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Last one and I swear I’ll stop asking questions. This is the track in question about it being lightly stained and what you thought about staining. Is this a real trace fossil that you can tell of? If so is this light staining acceptable?

Hi All, I have a question for those of you out there who know more about dinosaurs than I do. I recently picked up a grallator track that's about 5" long from Massachusetts. I'm thinking it would be cool to display this along with a tooth or two from a similar dinosaur. Obviously we don't know what species of dinosaur made the track, but does anyone know roughly what type/size of tooth I should try to find that would be a reasonable match for the type of dinosaur that likely would have made the track? While we're at it, I'd also be curious to know what size gastroliths this dinosaur might have had inside of it, if anyone knows. Thinking it could be fun to piece together a little set of parts roughly related to this track. For reference, here's the thread where I showed a picture of the track in question. Thank you!!

Hello! I have seen this. The seller assures that it is completely natural and is not polished. What do you think? Is it a good piece? Thank you very much

Hi All, I have the opportunity to acquire this specimen.... just curious to know everyone's thoughts? Anything I should be wary about? As far as quality is concerned, where do you think this rates on a scale of 1-10 (10 being museum quality/exceptional track, etc., and 1 being an entirely genuine/original track but a very poor example). I'm still learning about dino tracks.... Thank you so much!

Hello, I have had a long interest in fossils and have acquired a small but very nice quality (at least in my opinion) collection over the years. I've recently become interested in dinosaur tracks/footprints and would like to add one to my collection. The thing is, I can't seem to find any anywhere that don't have staining/coloring applied to them. I understand that this makes them "easier to see" but to me it's kind of strange and detracts from the fossil. If the imprint can't be seen on its own, I don't really want it... The painting just looks a bit silly to me. I've only come across one so far that doesn't have staining on it, and it's this one here (I've included a picture below - the track itself is apparently a bit over 6 inches). But I don't know what to think about this one since the matrix seems cracked and repaired very heavily and the price is still seemingly very expensive (at least to me). I would be very interested to know anyone's thoughts on how you approach dinosaur tracks. And if you have thoughts on this specific example, I'd certainly be open to hearing that too. Thanks a lot!!

I got this from an expo today, it was collected in Gill MA and supposed to be Anomoepus. The rock is about 6 inches by 4 inches. I'm not remotely familiar with tracks so hoping someone here can verify it. Pictures are with and without flash, let me know if you need other angles or anything to ID. Thank you!

I found this near the 476 turnpike where they tore up all the ground and exposed the New Brunswick Formation. This formation is triassic. I went to a dump site where the construction company took all the rock. Is this possibly some sort of trace fossil from a lizard or sphenodontid? (If you neer to see it better flip your phone or device upside down)

from Brazos River west of Houston Texas in a sandstone cast? I am not holding my breath on this one could this be a partial track?

Real or fake

The Green River Formation is one of the most well-known fossil sites in the world, occupying present-day Colorado, Utah and Wyoming. This Lagerstätte has been noted for its well-preserved fish fossils, as well as numerous invertebrates, plants, and sometimes even reptiles and birds. Green River fossils are Eocene-aged, at 53.5 to 48.5 million years old. Thankfully, not only are Green River fossils attractive, they also remain affordable to the casual collector. Allow me to present my humble collection. Crocodile tooth Borealosuchus sp. Southwest Wyoming Water bird tracks (possibly sandpipers or plovers) Presbyorniformipes feduccii Vernal, Utah Bird feather Aves indet. Southwest Wyoming Crane flies & Mosquitoes Pronophlebia rediviva & Culex sp. Parachute Creek Member; Douglas Pass, Colorado

I found this in Austin Texas near a gravel bar. Any thoughts?

Hi! My friend went to a museum and sent me a picture of this fossilized footprint. He said that they don't know what it is from. Does anyone have an idea?

Hello, this is a part 2 of my last thread with some of my other finds that I've found this at a site in new jersey where some footprints have been found from the Late Triassic/Early Jurassic, I am unsure about if these are footprints of sorts, any help will be appreciated thank you!

Hello, I've found this at a site in new jersey where some footprints have been found from the Late Triassic/Early Jurassic, I am unsure about if this is a footprint of sorts, any help will be appreciated thank you!

Hi It is horseshoe crab track fossil?

I stumbled across this today on a hike in SE Colorado. At first I wrote this off as just a neat natural shape in the rock but after closer inspection it has my curiosity peaked. the darker yellow area around it is also raised about 1/4 in. What do you all think?

Hi I was wondering if this footprint looks legit to everyone. It's allegedly a imprint and outprint of a Anchisauripus. I won it in a auction but I don't have it in hand yet so these are the best photos I have at the moment. Does it look like the real deal or should I be concerned? Thanks for any help

Hi, Last month I was browsing an estate auction, saw this footprint and without knowing anymore, since the price seemed reasonable I bought it.... I mean, never seen a "dino track" available. At least something new in the collection. The old man i bought it from, told me that if he remember well, he geot it from "someplace in the northeast" (a 80 something year old kid who was downsizing all his home), that´s all. If someone has an idea of where it could come from and what it could be I´ll appreciate it. Luis

Hello Please could you tell me what made these tracks? They are imprinted in the rock and on close inspection the track is a continuous line with horizontal lines rather like a worm has on its body. The imprinted trail meanders randomly across one square metre of rock. You can see the width of it compared with my finger in the image. It is on the Northumberland coast in England on a beach that has remains of petrified trees from prehistory. If the tracks were made by a type of prehistoric worm - what is the name of it, when would it have lived and what would its environment have been like? Thank you very much.

These are a few of the pdf files (and a few Microsoft Word documents) that I've accumulated in my web browsing. MOST of these are hyperlinked to their source. If you want one that is not hyperlinked or if the link isn't working, e-mail me at joegallo1954@gmail.com and I'll be happy to send it to you. Please note that this list will be updated continuously as I find more available resources. All of these files are freely available on the Internet so there should be no copyright issues. Articles with author names in RED are new additions since June 9, 2018. Tracks and Trackways Precambrian Chen, Z., et al. (2018). Late Ediacaran trackways produced by bilateran animals with paired appendages. Science Advances, 4:eaao6691. (Thanks to Oxytropidoceras for finding this one!) Liu, A.G., D. Mcllroy and M.D. Brasier (2010). First evidence for locomotion in the Ediacaran biota from the 565 Ma Mistaken Point Formation, Newfoundland. Geology, Vol.38, Number 2. Cambrian Alpert, S.P. (1976). Trilobite and Star-Like Trace Fossils from the White-Inyo Mountains, California. Journal of Paleontology, Vol.50, Number 2. Boyd, D.W. (2010). Morphology and taphonomy of an exceptional trackway from the Flathead Sandstone (Middle Cambrian) of Wyoming. Rocky Mountain Geology, Vol.45, Number 1. Burton-Kelly, M.E. (2005). An Analysis of Multiple Trackways of Protichnites Owen, 1852, from the Potsdam Sandstone (Late Cambrian), St. Lawrence Valley, NY. Bachelors Thesis - St. Lawrence University. Burton-Kelly, M.E. and J.M. Erickson (2010). A New Occurrence of Protichnites Owen, 1852, in the Late Cambrian Potsdam Sandstone of the St. Lawrence Lowlands. The Open Paleontology Journal, 3. Getty, P.R. (2007). Paleobiology of the Climactichnites Trackmaker: An Enigmatic Late Cambrian Animal Known Only from Trace Fossils. Masters Thesis - University of Massachusetts Amherst. Hagadorn, J.W. and A. Seilacher (2009). Hermit arthropods 500 million years ago? Geology. Hoxie, C.T. (2005). Late Cambrian Arthropod Trackways in Subaerially Exposed Environments. Incentives to Simplify a Problematic Ichnogenus. B.A. Honors Thesis - Amherst College. Minter, N.J., M.G. Mángano and J.-B. Caron (2012). Skimming the surface with Burgess Shale arthropod locomotion. Proc.R.Soc. B, 279. Radwanski, A. and P. Roniewicz (1972). A long trilobite-trackway, Cruziana semplicata Salter, from the Upper Cambrian of the Holy Cross Mts. Acta Geologica Polonica, Vol.22, Number 3. Silurian Gouramanis, C. and S. McLoughlin (2016). Siluro-Devonian trace fossils from the Mereenie Sandstone, Kings Canyon, Watarrka National Park, Amadeus Basin, Northern Territory, Australia. Alcheringa, 40. Hanken, N.-M. and L. Størmer (1975). The trail of a large Silurian eurypterid. Fossils and Strata, Number 4. Knaust, D. and N.J. Minter (2018). The fish swimming trace Undichna unisulca from the Silurian of Sweden: probably the oldest vertebrate locomotion trace fossil. Lethaia. Metz, R. (2013). An Exceptional Occurrence of the Trace Fossil Cruziana on a Bedding Surface of a Core of the Bloomsburg Red Beds (Silurian), Northwestern New Jersey. Northeastern Geoscience, Vol.31, Number 1. Wright, J.L., et al. (1995). A subaerial arthropod trackway from the Upper Silurian Clam Bank Formation of Newfoundland. Can.J. Earth Sci., 32. Devonian Braddy, S.J. and A.R.C. Milner (1998). A large arthropod trackway from the Gaspé Sandstone Group (Middle Devonian) of eastern Canada. Can.J. Earth Sci., 35. Draganitis, E., S.J. Braddy and D.E.G. Briggs (2001). A Gondwanan Coastal Arthropod Ichnofauna from the Muth Formation (Lower Devonian, Northern India): Paleoenvironment and Tracemaker Behavior. Palaios, Vol.16. Draganitis, E., B. Grasemann and S.J. Braddy (1998). Discovery of abundant arthropod trackways in the ?Lower Devonian Muth Quartzite (Spiti, India): implications for the depositional environment. Journal of Asian Earth Science, Vol.16, Numbers 2-3. Lucas, S.G. (2015). Thinopus and a Critical Review of Devonian Tetrapod Footprints. Ichnos, 22. Niedzwiedzki, G., et al. (2010). Tetrapod trackways from the early Middle Devonian period of Poland. Nature, Vol.463/7. Stossel, I., E.A. Williams and K.T. Higgs (2016). Ichnology and depositional environment of the Middle Devonian Valentia Island tetrapod trackways, south-west Ireland. Palaeogeography, Palaeoclimatology, Palaeoecology, 462. Wisshak, M., E. Volohonsky and D. Blomeier (2004). Acanthodian fish trace fossils from the Early Devonian of Spitsbergen. Acta Palaeontologica Polonica, 49(4). Carboniferous Carboniferous Tracks and Trackways - Africa/Middle East Lagnaoui, A., et al. (2018). Late Carboniferous Tetrapod Footprints from the Souss Basin, Western High Atlas Mountains, Morocco. Ichnos, Vol.25, Numbers 2-3. Carboniferous Tracks and Trackways - Europe (including Greenland and Siberia) Higgs, R. (1988). Fish Trails in the Upper Carboniferous of South-West England. Palaeontology, Vol.31, Part 2. Pollard, J., P. Seldon and S. Watts (2008). Trace fossils of the arthropod Camptophyllia from the Westphalian (Carboniferous) rocks of Lancashire, UK and their palaeoenvironmental context. Palaeogeography, Palaeoclimatology, Palaeoecology, 270. Voigt, S. and M. Ganzelewski (2010). Toward the origin of amniotes: Diadectomorph and synapsid footprints from the early Late Carboniferous of Germany. Acta Palaeontologica Polonica, 55(1). Carboniferous Tracks and Trackways - North America Buta, R.J., et al. (2005). Atlas of Union Chapel Mine Invertebrate Trackways and other Traces. In: Pennsylvanian Footprints in the Black Warrior Basin of Alabama. Buta, R.J., A.K. Rindsberg, and D.C. Kopaska-Merkel (eds.), Alabama Paleontological Society Monograph Number 1. Calder, J.H., D. Baird and E.B. Urdang (2004). On the discovery of tetrapod trackways from Permo-Carboniferous redbeds of Prince Edward Island and their biostratigraphic significance. Atlantic Geology, 40. Falcon-Lang, H.J., et al. (2010). Diverse tetrapod trackways in the Lower Pennsylvanian Tynemouth Creek Formation, near St. Martins, southern New Brunswick, Canada. Palaeogeography, Palaeoclimatology, Palaeoecology, In Press. Haubold, H., et al. (2005). Atlas of Union Chapel Mine Vertebrate Trackways and Swimming Traces. In: Pennsylvanian Footprints in the Black Warrior Basin of Alabama. Buta, R.J., A.K. Rindsberg, and D.C. Kopaska-Merkel (eds.), Alabama Paleontological Society Monograph Number 1. Haubold, H., et al. (2005). Interpretation of the Tetrapod Footprints from the Early Pennsylvanian of Alabama. In: Pennsylvanian Footprints in the Black Warrior Basin of Alabama. Buta, R.J., A.K. Rindsberg, and D.C. Kopaska-Merkel (eds.), Alabama Paleontological Society Monograph Number 1. Lucas, S.G. and A.J. Lerner (2005). Lower Pennsylvanian Invertebrate Ichnofossils from the Union Chapel Mine, Alabama: A Preliminary Assessment. In: Pennsylvanian Footprints in the Black Warrior Basin of Alabama. Buta, R.J., A.K. Rindsberg, and D.C. Kopaska-Merkel (eds.), Alabama Paleontological Society Monograph Number 1. Lucas, S.G., et al. (2005). Trackway of a Giant Arthropleura from the Upper Pennsylvanian of El Cobre Canyon, New Mexico. New Mexico Geological Society, 56th Field Conference Guidebook, Geology of the Chama Basin. Martino, R.L. (1991). Limnopus Trackways from the Conemaugh Group (Late Pennsylvanian), Southern West Virginia. J.Paleont., 65(6). Mitchell, R.H. (1931). Fossil Footprints from the Pennsylvanian of Ohio. The Ohio Journal of Science, Vol.XXXI, Number 6. Mossman, D.J. and R.G. Grantham (1999). Vertebrate trackways in the Parrsboro Formation (upper Carboniferous) at Rams Head, Cumberland County, Nova Scotia. Atlantic Geology, Vol.35, Number 3. Sundberg, F.A., et al. (1990). Upper Carboniferous (Namurian) amphibian trackways from the Bluefield Formation, West Virginia, USA. Ichnos, Vol.1. Tanner, L.H. (2013). A Pennsylvanian Tetrapod Trackway from Joggins, Nova Scotia: The Size Continuum of Batrachichnus salamandroides. In: The Carboniferous-Permian Transition. Lucas, S.G., et al. (eds.), New Mexico Museum of Natural History and Science, Bulletin 60. Vrazo, M.B., M.J. Benton and E.B. Daeschler (2007). Tetrapod tracks from the Mauch Chunk Formation (middle to upper Mississippian) of Pennsylvania, U.S.A. Proceedings of the Academy of Natural Sciences of Philadelphia, 156. Carboniferous Tracks and Trackways - South America/Central America/Caribbean Bell, C.M. and M.J. Boyd (1986). A Tetrapod Trackway from the Carboniferous of Northern Chile. Palaeontology, Vol.29, Part 3. General Carboniferous Tracks and Trackways Falcon-Lang, H.J., M.J. Benton and M. Stimson (2007). Ecology of earliest reptiles inferred from basal Pennsylvanian trackways. Journal of the Geological Society, London, Vol.164. Romano, M. and P. Citton (2014). Reliability of digit length impression as a character of tetrapod ichnotaxobase: reconsiderations from the Carboniferous-Permian ichnogenus Ichniotherium. Geological Journal, 50(5). Permian Brand, L.R. (1979). Field and Laboratory Studies on the Coconino Sandstone (Permian) Vertebrate Footprints and their Paleoecological Implications. Palaeogeography, Palaeoclimatology, Palaeoecology, 28. Brand, L.R. and J. Kramer (1996). Underprints of vertebrate and invertebrate trackways in the Permian Coconino Sandstone in Arizona. Ichnos, Vol.4. Brand, L.R. and T. Tang (1991). Fossil vertebrate footprints in the Coconino Sandstone (Permian) of northern Arizona: Evidence for underwater origin. Geology, Vol.19. Briggs, D.E.G., et al. (2010). Permo-Triassic arthropod trace fossils from the Beardmore Glacier area, central Transantarctic Mountains, Antarctica. Antarctic Science, 22(2). Chakraborty, A., and H.N. Bhattacharya (2012). Fossil Permian Xiphosurid Trackways from India. Journal Geological Society of India, Vol.80. Citton, P., et al. (2016). Unveiling trampling history through trackway interferences and track preservational features: a case study from the Bletterbach gorge (Redagno, Western Dolomites, Italy). Palaeontologia Electronica, 19.2.20A. da Silva, R.C., F.A. Sedor and A.C.S. Fernandes (2009). Ichnotaxonomy, functional morphology and paleoenvironmental context of Mesosauridae tracks from Permian of Brazil. Revista Brasileira de Geociencias, 39(4). de Klerk, W.J. (2002). A Dicynodont Trackway from the Cistecephalus Assemblage Zone in the Karoo, East of Graaf-Reinet, South Africa. Palaeont.afr., 38. Kubo, T. and M.J. Benton (2009). Tetrapod Postural Shift Estimated from Permian and Triassic Trackways. Palaeontology, Vol.52, Part 5. Lucas, S.G., A.P. Hunt and N. Hotton (1994). The Paleozoic Trackways Scientific Study Report. (246 pages) Mancuso, A.C., et al. (2016). Tetrapod Tracks Taphonomy in Eolian Facies from the Permian of Argentina. Palaios, Vol.31. Marchetti, L., et al. (2015). Revision of a classic site for Permian tetrapod ichnology (Collio Formation, Trompia and Caffaro valleys, N. Italy), new evidences for the radiation of captorhinomorph footprints. Palaeogeography, Palaeoclimatology, Palaeoecology, 433. Tverdokhlebov, V.P., et al. (1997). First Record of Footprints of Terrestrial Vertebrates from the Upper Permian of the Cis-Urals, Russia. Palaeontology, Vol.40, part 1. Triassic Triassic Tracks and Trackways - Africa/Middle East Klein, H., et al. (2011). First occurrence of a Middle Triassic tetrapod ichnofauna from the Argana Basin (Western High Atlas, Morocco). Palaeogeography, Palaeoclimatology, Palaeoecology, 307. Lagnaoui, A., et al. (2016). New discoveries of archosaur and other tetrapod footprints from the Timezgadiouine Formation (Irohalene Member, Upper Triassic) of the Argana Basin, western High Atlas, Morocco - Ichnotaxonomic implications. Palaeogeography, Palaeoclimatology, Palaeoecology, 453. Lagnaoui, A., et al. (2012). Late Triassic Tetrapod-Dominated Ichnoassemblages from the Argana Basin (Western High Atlas, Morocco). Ichnos, 19. Triassic Tracks and Trackways - Asia/Malaysia/Pacific Islands Lu, Z.-s., et al. (2004). Genetic interpretation of fish swimming trails and calculation of fish-body length in Late Triassic Hengshan, Shaanxi Province, China. Science in China, Ser.D Earth Sciences, Vol.47, Number 3. Xing, L.D., et al. (2014). An unusual trackway of a possibly bipedal archosaur from the Late Triassic of the Sichuan Basin, China. Acta Palaeontologica Polonica, 59(4). Xing, L.D., et al. (2013). Chirotherium Trackways from the Middle Triassic of Guizhou, China. Ichnos, 20. Xing, L.D., et al. (2013). Earliest records of theropod and mammal-like tetrapod footprints in the Upper Triassic of Sichuan Basin, China. Vertebrata PalAsiatica, 51(3). Zhang, Q., et al. (2014). Nothosaur foraging tracks from the Middle Triassic of southwestern China. Nature Communications, 5: 3973. Triassic Tracks and Trackways - Australia/New Zealand Pepperell, J. and G. Grigg (1973). A Labyrinthodont Trackway from the Mid-Triassic Near Sydney, New South Wales. Proceedings of the Linnean Society of New South Wales, Vol.99, Part 1. Retallack, G.J. (1996). Early Triassic therapsid footprints from the Sydney Basin, Australia. Alcheringa, 20. Triassic Tracks and Trackways - Europe (including Greenland and Siberia) D'Orazi-Porchetti, S., et al. (2008). Atreipus-like footprints and their co-occurrence with Evazoum from the Upper Carnian (Tuvalian) of the Trentino-Alto Adige. Studi Trent.Sci.Nat., Acta Geol., 83. Dalla Vecchia, F.M. (1996). Archosaurian Trackways in the Upper Carnian of Dogna Valley (Udine, Friuli, NE Italy). Natura Nascosta, Number 20. Fichter, J. and R. Kunz (2013). "Dinosauromorph" tracks from the Middle Buntsandstein (Early Triassic: Olenekian) of Wolfhagen, northern Hesse, Germany. Comunicaoes Geologicas, 100,1. Fuglewicz, R., T. Ptaszynski and K. Rdzanek (1990). Lower Triassic Footprints from the Swietokrzyskie (Holy Cross) Mountains, Poland. Acta Palaeontologica Polonica, 35(3-4). Lallensack, J.N., et al. (2017). Sauropodomorph dinosaur trackways from the Fleming Fjord Formation of East Greenland: Evidence for Late Triassic sauropods. Acta Palaeontologica Polonica, 62(X). Milan, J. and G. Gierlinski (2004). A probable thyreophoran (Dinosauria, Ornithischia) footprint from the Upper Triassic of southern Sweden. Bulletin of the Geological Society of Denmark, Vol.51. Milan, J., L.B. Clemmensen and N. Bonde (2004). Vertical sections through dinosaur tracks (Late Triassic lake deposits, East Greenland) - undertracks and other subsurface deformation structures revealed. Lethaia, Vol.37. Mujal, E., et al. (2017). An archosauromorph dominated ichnoassemblage in fluvial settings from the late Early Triassic of the Catalan Pyrenees (NE Iberian Peninsula). PLoS ONE, 12(4). Reolid, M., et al. (2018). Ichnological evidence of semi-aquatic locomotion in early turtles from eastern Iberia during the Carnian Humid Episode (Late Triassic). Palaeogeography, Palaeoclimatology, Palaeoecology, 490. Schulp, A.S., et al. (2017). A tetrapod swimming traceway from the Triassic of Winterswijk, the Netherlands. Netherlands Journal of Geosciences. Triassic Tracks and Trackways - North America Fraser, N.C. and P.E. Olsen (1996). A New Dinosauromorph Ichnogenus from the Triassic of Virginia. Jeffersoniana, Number 7. Gay, R.J., X.A. Jenkins and T. Lepore (2017). The oldest vertebrate trace fossils from Comb Ridge (Bears Ears National Monument, southeastern Utah). PeerJ Preprints. (not peer reviewed) Hunt, A.P. and S.G. Lucas (2007). Late Triassic Tetrapod Tracks of Western North America. In: Triassic of the American West. Lucas, S.G. and J.A. Spielmann (eds.), New Mexico Museum of Natural History and Science, Bulletin 40. Lockley, M.G. and G.D. Gierlinski (2009). A Grallator-dominated tracksite from the Chinle Group (Late Triassic), Moab, Utah. Geological Quarterly, 53(4). Sullivan, R.M., K. Randall and M. Hendricks (1994). The Graterford Dinosaurs: Tracking Triassic Travelers. Pennsylvania Geology, Vol.25, Number 4. Triassic Tracks and Trackways - South America/Central America/Caribbean da Silva, R.C., et al. (2012). Footprints of large theropod dinosaurs and implications on the age of Triassic biotas from Southern Brazil. Journal of South American Earth Sciences, 39. da Silva, R.C., et al. (2008). Lacertoid footprints from the Upper Triassic (Santa Maria Formation) of Southern Brazil. Palaeogeography, Palaeoclimatology, Palaeoecology, 262. Genise, J.F., et al. (2009). Application of neoichnological studies to behavioural and taphonomic interpretation of fossil bird-like tracks from lacustrine settings: The Late Triassic-Early Jurassic? Santo Domingo Formation, Argentina. Palaeogeography, Palaeoclimatology, Palaeoecology, 272. Marsicano, C.A. and S.P. Barredo (2004). A Triassic tetrapod footprint assemblage from Southern South America: palaeobiogeographical and evolutionary implications. Palaeogeography, Palaeoclimatology, Palaeoecology, 203. General Triassic Tracks and Trackways Brusatte, S.L., G. Niedzwiedzki and R.J. Butler (2011). Footprints pull origin and diversification of dinosaur stem lineage deep into Early Triassic. Proc.R.Soc. B, 278. Hunt, A.P. and S.G. Lucas (2007). The Triassic Tetrapod Track Record: Ichnofaunas, Ichnofacies and Biochronology. In: The Global Triassic. Lucas, S.G. and J.A. Spielmann (eds.), New Mexico Museum of Natural History and Science, Bulletin 41. Klein, H. and S.G. Lucas (2010). Tetrapod footprints - their use in biostratigraphy and biochronology of the Triassic. In: The Triassic Timescale. Lucas, S.G. (ed.), Geological Society, London, Special Publications 334. Kubo, T. and M.J. Benton (2009). Tetrapod Postural Shift Estimated from Permian and Triassic Trackways. Palaeontology, Vol.52, Part 5. Milan, J., et al. (2006). Theropod Foot Movement Recorded By Late Triassic, Early Jurassic and Late Jurassic Fossil Footprints. In: The Triassic-Jurassic Terrestrial Transition. Harris, et al. (eds.), New Mexico Museum of Natural History and Science, Bulletin 37. Olsen, P.E. and D. Baird (1986). 6. The Ichnogenus Atreipus and its significance for Triassic biostratigraphy. In: The Beginning of the Age of Dinosaurs: Faunal Change Across the Triassic-Jurassic Boundary. Padian, K. (ed.), Cambridge University Press, New York. (Thanks to Troodon for pointing this one out!) Jurassic Jurassic Tracks and Trackways - Africa/Middle East Hadri, M., et al. (2015). Crocodyliform footprints from "les couches rouges" of the Middle Jurassic of Msemrir, High Atlas, Morocco. Geogaceta, 58. Klein, H., et al. (2018). Crocodylomorph, turtle and mammal tracks in dinosaur-dominated Middle-?Upper Jurassic and mid-Cretaceous ichnoassemblages of Morocco. Palaeogeography, Palaeoclimatology, Palaeoecology, 498. Masrour, M. and F. Perez-Lorente (2014). Otozoum trackway in Issil-n-Ait Arbi (Lower Jurassic, Central High Atlas, Morocco). Geogaceta, 56. Mudroch, A., et al. (2011). Didactyl Tracks of Paravian Theropods (Maniraptora) from the ?Middle Jurassic of Africa. PLoS ONE, 6(2). (Read on-line or download a copy.) Schulp, A.S., M. Al-Wosabi and N.J. Stevens (2008). First Dinosaur Tracks from the Arabian Peninsula. PLoS ONE, 3(5). (Read on-line or download a copy.) Sciscio, L., et al. (2017). The first megatheropod tracks from the Lower Jurassic upper Elliot Formation, Karoo Basin, Lesotho. PLoS ONE, 12(10). Wilson, J.A., C.A. Marsicano and R.M.H. Smith (2009). Dynamic Locomotor Capabilities Revealed by Early Dinosaur Trackmakers from Southern Africa. PLoS ONE, 4(10). (read on-line or download from site) Jurassic Tracks and Trackways - Asia/Malaysia/Pacific Islands Gao, Y.-H. (2007). New Dinosaur Footprints from Lower Jurassic of Weiyuan, Sichuan. Vertebrata PalAsiatica, 45(4). Pienkowski, G., et al. (2015). Dinosaur footprints from the Thaiat ridge, and their palaeoenvironmental background, Jaisalmer Basin, Rajastan, India. Volumina Jurassica, XIII(1). Sullivan, C., et al. (2009). A New Occurrence of Small Theropod Tracks in the Houcheng (Tuchengzi) Formation of Hebei Province, China. Vertebrata PalAsiatica, 47(1). Xing, L.-D., J.D. Harris and P.J. Currie (2011). First record of dinosaur trackway from Tibet, China. Geological Bulletin of China, Vol.30, Number 1. Xing, L.-D., J.D. Harris and G.D. Gierlinski (2011). Therangospodus and Megalosauripus Track Assemblage from the Upper Jurassic - Lower Cretaceous Tuchengzi Formation of Chicheng County, Hebei Province, China, and Their Paleoecological Implications. Vertebrata PalAsiatica, Vol. 49(4). Xing, L.-D., et al. (2017). Theropod tracks from the Lower Jurassic of Gulin area, Sichuan Province, China. Palaeoworld, 26. Xing, L.-D., et al. (2016). The first record of Anomoepus tracks from the Middle Jurassic of Henan Province, Central China. Historical Biology, 2016. Xing, L.-D., et al. (2016). New Middle Jurassic dinosaur track record from northeastern Sichuan Province, China. Swiss J.Paleontol., published on-line. Xing, L.-D., et al. (2015). Hints of the Early Jehol Biota: Important Dinosaur Footprint Assemblages from the Jurassic-Cretaceous Boundary Tuchengzi Formation in Beijing, China. PLoS ONE, 10(4). Xing, L.-D., et al. (2014). Sauropod and Small Theropod Tracks from the Lower Jurassic Ziliujing Formation of Zigong City, Sichuan, China, with an Overview of Triassic-Jurassic Dinosaur Fossils and Footprints of the Sichuan Basin. Ichnos, 21. Xing, L.-D., et al. (2013). Two theropod track assemblages from the Jurassic of Congqing, China, and the Jurassic Stratigraphy of Sichuan Basin. Vertebrata PalAsiatica, 51(2). Jurassic Tracks and Trackways - Europe (including Greenland and Siberia) Avanzini, M., L. Pinuela and J.C. Garcia-Ramos (2010). First report of a Late Jurassic lizard-like footprint (Asturias, Spain). Journal of Iberian Geology, 36(2). Avanzini, M., L. Pinuela and J.C. Garcia-Ramos (2008). Theropod Palaeopathology inferred from a Late Jurassic trackway, Asturias (N.Spain). Oryctos, Vol.8. Belvedere, M., et al. (2017). Dinosaur footprints from the top of Mt. Pelmo: new data for Early Jurassic palaeogeography of the Dolomites (NE Italy). Bollettino della Societa Paleontologica Italiana, 56(2). Clark, N.D.L. and J.L. Barco Rodriguez (1998). The First Dinosaur Trackway from the Valtos Sandstone Formation (Bathonian, Jurassic) of the Isle of Skye, Scotland, UK. Geogaceta, Vol.24, Article 20. Conti, M.A., et al. (2005). Jurassic Dinosaur Footprints from Southern Italy: Footprints as Indicators of Constraints in Paleogeographic Interpretation. Palaios, Vol.20. Gaillard, C., et al. (2005). Isopod Trackways from the Crayssac Lagerstätte, Upper Jurassic, France. Palaeontology, Vol.48, Part 5. Gierlinski, G.D. (1999). Tracks of a large thyreophoran dinosaur from the Early Jurassic of Poland. Acta Palaeontologica Polonica, Vol.44, Number 2. Gierlinski, G.D. (1996). Avialan Theropod Tracks from the Early Jurassic Strata of Poland. Zubia, 14. Gierlinski, G.D., G. Niedzwiedzki and P. Nowacki (2009). Small theropod and ornithopod footprints in the Late Jurassic of Poland. Acta Geologica Polonica, Vol.59, Number 2. Lomax, D.R. and C.A. Racay (2012). A Long Mortichnial Trackway of Mesolimulus walchi from the Upper Jurassic Solnhofen Lithographic Limestone near Wintershof, Germany. Ichnos, 19. Manni, R., U. Nicosia and G. Nobili (1999). An Unusual Tetrapod Trackway from Lower Jurassic Marine Sediments of Central Italy: Accordiichnus natans N. Ichnogen, N. Ichnosp. Geologica Romana, 35. Mateus, O. and J. Milàn (2008). Ichnological evidence for giant ornithopod dinosaurs in the Upper Jurassic Lourinhã Formation, Portugal. Oryctos, Vol.8. Mateus, O., et al. (2011). New finds of stegosaur tracks from the Upper Jurassic Lourinha Formation, Portugal. Acta Palaeontologica Polonica, 56(3). Milan, J. (2011). New theropod, thyreophoran and small sauropod tracks from the Middle Jurassic Baga Formation, Bornholm, Denmark. Bulletin of the Geological Society of Denmark, Vol.59. Moreau, J.-D., et al. (2012). Biometric and morphometric approaches on Lower Hettangian dinosaur footprints from the Rodez Strait (Aveyron, France). C.R. Palevol, 11. Jurassic Tracks and Trackways - North America Dalman, S.G. and R.E. Weems (2013). A New Look at Morphological Variation in the Ichnogenus Anomoepus, With Special Reference to Material from the Lower Jurassic Newark Supergroup: Implications for Ichnotaxonomy and Ichnodiversity. Bulletin of the Peabody Museum of Natural History, 54(1). Getty, P.R. (2005). Excavated and In Situ Dinosaur Footprints from the Murray Quarry (Early Jurassic East Berlin Formation), Holyoke, Massachusetts, USA. Ichnos, 12. Getty, P.R. and N. Fox (2015). An Isolated Eubrontes giganteus Trackway from Gary Gaulin Dinosaur Track Site (Early Jurassic, East Berlin Formation), Holyoke, Massachusetts. Northeastern Geoscience, Vol.33. Harris, J.D. and K.J. Lacovara (2004). Enigmatic Fossil Footprints from the Sundance Formation (Upper Jurassic) of Bighorn Canyon National Recreation Area, Wyoming. Ichnos, 11. Lockley, M.G., R.T. McCrea and L.G. Buckley (2015). A review of dinosaur track occurrences from the Morrison Formation in the type area around Dinosaur Ridge. Palaeogeography, Palaeoclimatology, Palaeoecology, 433. Lockley, M.G., G.D. Gierlinski and S.G. Lucas (2011). Kayentapus Revisited: Notes on the Type Material and the Importance of This Theropod Footprint Ichnogenus. In: Fossil Record 3. Sullivan, et al. (eds.), New Mexico Museum of Natural History and Science, Bulletin 53. Lockley, M.G., et al. (2017). New dinosaur track occurrences from the Upper Jurassic Salt Wash Member (Morrison Formation) of southeastern Utah: Implications for thyreophoran trackmaker distribution and diversity. Palaogeography, Palaeoclimatology, Palaeoecology, 470. Milan, J., D.B. Loope and R.G. Bromley (2008). Crouching theropod and Navahopus sauropodomorph tracks from the Early Jurassic Navajo Sandstone of USA. Acta Palaeontolotica Polonica, 53(2). Milner, A.R.C., M.G. Lockley, and J.I. Kirkland (2006). A Large Collection of Well-Preserved Theropod Dinosaur Swim Tracks from the Lower Jurassic Moenave Formation, St. George, Utah. In: The Triassic-Jurassic Terrestrial Transition. Harris, et al. (eds.), New Mexico Museum of Natural History and Science Bulletin 37. Olsen, P.E., J.B. Smith and N.G. McDonald (1998). Type Material of the Type Species of the Classic Theropod Footprint Genera Eubrontes, Anchisauripus and Grallator (Early Jurassic, Hartford and Deerfield Basins, Connecticut and Massachusetts, USA). Journal of Vertebrate Paleontology, 18(3). Rainforth, E.C. (2005). Ichnotaxonomy of the Fossil Footprints of the Connecticut Valley (Early Jurassic, Newark Supergroup, Connecticut and Massachusetts). Ph.D. Dissertation - Columbia University. Jurassic Tracks and Trackways - South America/Central America/Caribbean Apesteguia, S. and P.A. Gallina (2011). Tunasniyoj, a dinosaur tracksite from the Jurassic-Cretaceous boundary of Bolivia. Annals of the Brazilian Academy of Sciences, 83(1). De Valais, S., R.N. Melchor and J.F. Genise (2003). Hexapodichnus casamiqueli isp.nov.: an insect trackway from the La Matilde Formation (Middle Jurassic), Santa Cruz, Argentina. Asociación Paleontológica Argentina, Special Publication 9. Dentzien-Dias, P.C., et al. (2007). The Trace Fossil Record from the Guará Formation (Upper Jurassic?), Southern Brazil. Arquivos do Museo Nacional, Rio de Janeiro, Vol.65, Number 4. Ferrusquía-Villafranca, I., V.M. Bravos-Cuevas and E. Jiménez-Hidalgo (2007). The Xochixtlapilco Dinosaur Ichnofauna, Middle Jurassic, of Oaxaca, Southeastern Mexico: Description and Paleontologic Significance. Contributions in Science, Number 515. Moreno, K. and M.J. Benton (2005). Occurrence of sauropod dinosaur tracks in the Upper Jurassic of Chile (Redescription of Iguanodonichnus frenki). Journal of South American Earth Sciences, 20. Rodriguez-de la Rosa, R.A., et al. (2018). Middle Jurassic ankylosaur tracks from Mexico. Boletin de la Sociedad Geologica Mexicana, Vol.70, Number 2. General Jurassic Tracks and Trackways Lockley, M.G., C.A. Meyer and J.J. Moratalla (1998). Therangospodus: Trackway Evidence for the Widespread Distribution of a Late Jurassic Theropod with Well-Padded Feet. Gaia, Number 15. Milan, J., et al. (2006). Theropod Foot Movement Recorded By Late Triassic, Early Jurassic and Late Jurassic Fossil Footprints. In: The Triassic-Jurassic Terrestrial Transition. Harris, et al. (eds.), New Mexico Museum of Natural History and Science, Bulletin 37. Milner, A.C., et al. (2009). Bird-Like Anatomy, Posture, and Behavior Revealed by an Early Jurassic Theropod Dinosaur Resting Trace. PLoS ONE, 4(3). (read on-line or download from site. Thanks to Nandomas for pointing this one out) Padian, K. and P.E. Olsen (1984). The Fossil Trackway Pteraichnus: Not Pterosaurian, But Crocodilian. Journal of Paleontology, Vol.58, Number 1. Weems, R.E. (2006). Locomotor Speeds and Patterns of Running Behavior in Non-Maniraptoriform Theropod Dinosaurs. In: The Triassic-Jurassic Terrestrial Transition. Harris, et al. (eds.), New Mexico Museum of Natural History and Science, Bulletin 37. Cretaceous Cretaceous Tracks and Trackways - Africa/Middle East Belvedere, M., et al. (2013). Vertebrate footprints from the Kem Kem Beds: A novel ichnological approach to faunal reconstruction. Palaeogeography, Palaeoclimatology, Palaeoecology, 383-384. Boudchiche, L., et al. (2017). Jarrate Lbel: New Upper Cretaceous continental site in Morocco. A probable ornithischian non-ornithopod trackway and three amble gait titanosauriform trackways. Geogaceta, 61. Ibrahim, N., et al. (2014). Dinosaur Footprints and Ichnofauna from the Cretaceous Kem Kem Beds of Morocco. PLoS ONE, 9(3). Klein, H., et al. (2018). Crocodylomorph, turtle and mammal tracks in dinosaur-dominated Middle-?Upper Jurassic and mid-Cretaceous ichnoassemblages of Morocco. Palaeogeography, Palaeoclimatology, Palaeoecology, 498. Mateus, O., et al. (2017). Angolan ichnosite in a diamond mine shows the presence of a large terrestrial mammaliamorph, a crocodylomorph and sauropod dinosaurs in the Early Cretaceous of Africa. Palaeogeography, Palaeoclimatology, Palaeoecology, 471. Porchetti, S.D. and A. Wagensommer (2015). A vertebrate trackway from the Twyfelfontein Formation (Lower Cretaceous), Damaraland, Namibia. Palaontol Z, published on-line. Cretaceous Tracks and Trackways - Asia/Malaysia/Pacific Islands Currie, P.J., D. Badamgarav and E.B. Koppelhus (2003). The First Late Cretaceous Footprints from the Nemegt Locality in the Gobi of Mongolia. Ichnos, 10. Falk, A.R., J.-D. Lim and S.T. Hasiotis (2014). A behavioral analysis of fossil bird tracks from the Haman Formation (Republic of Korea) shows a nearly modern avian ecosystem. Vertebrata PalAsiatica, 52(1). Ishigaki, S. (2010). Theropod trampled bedding plane with laboring trackways from the Upper Cretaceous Abdrant Nuru fossil site, Mongolia. Hayashibara Museum of Natural Science Research Bulletin, Vol.3. Kim, J.Y., et al. (2006). The oldest record of webbed bird and pterosaur tracks from South Korea (Cretaceous Haman Formation, Changseon and Sinsu Islands): More evidence of high avian diversity in East Asia. Cretaceous Research, 27. Kim, K.S., et al. (2018). First reports of a distinctive theropod track assemblage from the Jinju Formation (Late Cretaceous) of Korea provides strong correlations with China. Cretaceous Research, 81. Kim, K.S., et al. (2017). Korean trackway of a hopping, mammaliform trackmaker is first from the Cretaceous of Asia. Cretaceous Research, 74. Kim, K.S., et al. (2017). First report of lacertiform (lizard) tracks from the Cretaceous of Asia. Cretaceous Research, 69. Lee, Y-N. and J-J. Lee (2006). A Sauropod Trackway in Donghae-Myeon, Goseong County, South Gyeongsang Province, Korea and its Paleobiological Implications of Uhangri Manus-Only Sauropod Tracks. J.Paleont.Soc. Korea, Vol.22, Number 1. Li, D., et al. (2006). A Preliminary Report on Two New Vertebrate Track Sites Including Dinosaurs from the Early Cretaceous Hekou Group, Gansu Province, China. J.Paleont.Soc. Korea, Vol.22, Number 1. Lim, J.-D., et al. (2000). The oldest known tracks of web-footed birds from the Lower Cretaceous of South Korea. Naturwissenschaften, 87. Matsukawa, M. and I. Obata (1985). Discovery of Dinosaur Footprints from the Lower Cretaceous Sebayashi Formation, Japan. Proc. Japan Acad., Series B, Vol.61, Number 3. Matsukawa, M., et al. (1995). Dinosaur Footprints from the Lower Cretaceous of Eastern Manchuria, Northeastern China: Implications for the Recognition of an Ornothopod Ichnofacies in East Asia. Palaios, Vol.10, Number 1. Tsukiji, Y., et al. (2018). New ornithopod footprints from the Lower Cretaceous Kitadani Formation, Fukui, Japan: Ichnotaxonomical implications. Cretaceous Research, 84. Xing, L-D., et al. (2018). Multiple parallel deinonychosaurian trackways from a diverse dinosaur track assemblage of the Lower Cretaceous Dasheng Group of Shandong Province, China. Cretaceous Research, 90. Xing, L-D., et al. (2017). Lower Cretaceous avian tracks from Jiangsu Province, China: A first Chinese report for ichnogenus Goseongornipes (Ignotornidae). Cretaceous Research, 84. Xing, L.-D., et al. (2017). Mid-Cretaceous dinosaur track assemblage from the Tongfosi Formation of China: Comparison with the track assemblage of South Korea. Cretaceous Research, 74. Xing, L.-D., et al. (2017). Sauropod Trackway Reflecting an Unusual Walking Pattern from the Early Cretaceous of Shandong Province, China. Ichnos, Vol.24, Number 1. Xing, L.-D., et al. (2017). Late Cretaceous ornithopod-dominated theropod, and pterosaur track assemblages from the Nanxiong Basin, China: New discoveries, ichnotaxonomy , and paleoecology. Palaeogeography, Palaeocimatology, Palaeoecology, 466. Xing, L.-D., et al. (2016). Complex In-Substrate Dinosaur (Sauropoda, Ornithopoda) Foot Pathways Revealed by Deep Natural Track Casts from the Lower Cretaceous Xiagou and Zhonggou Formations, Gansu Province, China. Ichnos, Vol.0, Number 0. Xing, L.-D., et al. (2016). Digit-only sauropod pes trackways from China - evidence of swimming or a preservational phenomenon? Scientific Reports, 6:21138. Xing, L.-D., et al. (2016). A new Minisauripus site from the Lower Cretaceous of China: Tracks of small adults or juveniles? Palaeogeography, Palaeoclimatology, Palaeoecology, 462. Xing, L.-D., et al. (2015). The longest theropod trackway from East Asia, and a diverse sauropod-, theropod- and ornithopod-track assemblage from the Lower Cretaceous Jiaguan Formation, southwest China. Cretaceous Research, 56. Xing, L.-D., et al. (2015). An unusual sauropod turning trackway from the Early Cretaceous of Shandong Province, China. Palaeogeography, Palaeoclimatology, Palaeoecology, 437. Xing, L.-D., et al. (2015). Reanalysis of Wupus agilis (Early Cretaceous) of Chongqing, China as a Large Avian Trace: Differentiating between Large Bird and Small Non-Avian Theropod Tracks. PLoS ONE, 10(5). Xing, L.-D., et al. (2013). A new Early Cretaceous dinosaur track assemblage and the first definite non-avian theropod swim trackway from China. Chinese Science Bulletin, Vol.58, Number 19. Xing, L.-D., et al. (2013). Diverse dinosaur ichnoassemblages from the Lower Cretaceous Dasheng Group in the Yishu fault zone, Shandong Province, China. Cretaceous Research, 45. Xing, L.-D., et al. (2013). Pterosaur trackways from the Lower Cretaceous Jiaguan Formation (Barremian-Albian) of Qijiang, Southwest China. Palaeogeography, Palaeoclimatology, Palaeoecology, 392. Xing, L.-D., et al. (2012). Early Cretaceous pterosaur tracks from a "buried" dinosaur tracksite in Shandong Province, China. Palaeoworld, 21. Xing, L.-D., et al. (2009) Ornithopod (Dinosauria: Ornithischia) tracks from the Upper Cretaceous Zhutian Formation in the Nanxiong Basin, Guangdong, China, and general observations on large Chinese ornithopod footprints. Geological Bulletin of China, Vol.28, Number 7. Xing, L.-D., et al. (2009). Theropod (Dinosauria: Saurischia) tracks from Lower Cretaceous Yixian Formation at Sihetun Village, Liaoning Province, China and possible track makers. Geological Bulletin of China, Vol.28, Number 5. Yu, X.-Q., Y. Kobayashi and J.-C. Lu (1999). The Preliminary Study of the Dinosaur Footprints from Huangshan, Anhui Province. Vertebrata PalAsiatica, 37(4). Zhang, J., et al. (2006). Diverse dinosaur-, pterosaur-, and bird-track assemblages from the Hakou Formation, Lower Cretaceous of Gansu Province, northwest China. Cretaceous Research, 27. Cretaceous Tracks and Trackways - Australia/New Zealand Romilio, A., R.T. Tucker and S.W. Salisbury (2013). Reevaluation of the Lark Quarry Dinosaur Tracksite (Late Albian-Cenomanian Winton Formation, Central-Western Queensland, Australia): No Longer a Stampede? Journal of Vertebrate Paleontology, 33(1). Cretaceous Tracks and Trackways - Europe (including Greenland and Siberia) Citton, P., et al. (2017). The first dinosaur tracksite from Abruzzi (Monte Cagno, Central Apennines, Italy). Cretaceous Research, 73. Citton, P., et al. (2015). Elongated theropod tracks from the Cretaceous Apenninic Carbonate Platform of southern Latium (central Italy). Palaeontologia Electronica, 18.3.49A. Dalla Vecchia, F.M. (1998). Theropod Footprints in the Cretaceous Adriatic-Dinaric Carbonate Platform (Italy and Croatia). Gaia, Number 15. Dalla Vecchia, F.M. and S. Venturini (1995). A Theropod (Reptilia, Dinosauria) Footprint on a Block of Cretaceous Limestone at the Pier of Porto Corsini (Ravenna, Italy). Revista Italiana di Paleontologia y Stratigrafia, Vol.101, Number 1. Dalla Vecchia, F.M., A. Tarlao and G. Tunis (1993). Theropod (Reptilia, Dinosauria) footprints in the Albian (Lower Cretaceous) of the Quieto/Mirna river mouth (NW Istria, Croatia) and dinosaur population of the Istraian region during the Cretaceous. Mem.Sci.geol., Vol.45. Dalla Vecchia, F.M., et al. (2002). Late Barremian and late Albian (early Cretaceous) dinosaur track sites in the main Brioni/Brijun island (SW Istria, Croatia). Natura Nascosta, Number 25. Dalla Vecchia, F.M., et al. (2001). Dinosaur track sites in the upper Cenomanian (Late Cretaceous) of Istrian Peninsula (Croatia). Bollettino della Societa Paleontologica Italiana, 40(1). Lallensack, J.N., A.H. van Heteren and O. Wings (2016). Geometric morphometric analysis of intratrackway variability: a case study on theropod and ornithopod dinosaur trackways from Munchehagen (Lower Cretaceous, Germany). PeerJ, 4:e2059. Mateus, O. and M.T. Antunes (2003). A new dinosaur tracksite in the Lower Cretaceous of Portugal. Ciencias da Terra (UNL), Number 15. Moratalla, J.J. and J. Hernán (2009). Turtle and Pterosaur Tracks from the Los Cayos Dinosaur Tracksite, Cameros Basin (Cornago, La Rioja, Spain): Tracking the Lower Cretaceous Bio-Diversity. Revista Española de Paleontología, 24(1). Moratalla, J.J. and J. Hernán (2005). Field Trip Guide to the La Rioja Fossil Tracksites. International Symposium on Dinosaurs and Other Vertebrate Paleoichnology. Moratalla, J.J., et al. (2017). A new trackway possibly made by a trotting theropod at the Las Hoyas fossil site (Early Cretaceous, Cuenca Province, Spain): Identification, bio-dynamics, and palaeoenvironmental implications. Palaeontologia Electronica, 20.3.59A. Nicosia, U., et al. (1999). The Late Cretaceous Dinosaur Tracksite Near Altamura (Bari, Southern Italy). Geologica Romana, 35. (Thanks to Nandomas for pointing this one out.) Petti, F.M., et al. (2010). A new purported ankylosaur trackway in the Lower Cretaceous (Lower Aptian) shallow-marine carbonate deposits of Puglia, southern Italy. Cretaceous Research, 31. Sánchez-Hernández, B., A.G. Przewieslik and M.J. Benton (2009). A Reassessment of the Pteraichnus Ichnospecies from the Early Cretaceous of Soria Province, Spain. Journal of Vertebrate Paleontology, 29(2). Vila, B., et al. (2013). The Latest Succession of Dinosaur Tracksites in Europe: Hadrosaur Ichnology, Track Production and Palaeoenvironments. PLoS ONE, 8(9). Cretaceous Tracks and Trackways - North America Albritton, C.C. (1942). Dinosaur Tracks Near Comanche, Texas. Field & Laboratory, SMU, 10(2). Anfinson, O.A., et al. (2009). First report of the small bird track Koreanaornis from the Cretaceous of North America: implications for avian ichnotaxonomy and paleoecology. Cretaceous Research, 30. Currie, P.J. (1983). Hadrosaur Trackways from the Lower Cretaceous of Canada. Acta Palaeontologica Polonica, Vol.28, Numbers 1-2. Farlow, J.O., et al. Dinosaur Tracksites of the Paluxy River Valley (Glen Rose Formation, Lower Cretaceous), Dinosaur Valley State Park, Somervell County, Texas. (Figures not included). Fiorillo, A.R. (2005). Turtle Tracks in the Judith River Formation (Upper Cretaceous) of South-Central Montana. Palaeontologia Electronica, Vol.8, Issue 1. Fiorillo, A.R., S.T. Hasiotis and Y. Kobayashi (2014). Herd structure in Late Cretaceous polar dinosaurs: A remarkable new dinosaur tracksite, Denali National Park, Alaska, USA. Geology, Item 2014267. Harris, J.D., et al. (1996). Four-toed theropod footprints and a paleomagnetic age from the Whetstone Falls Member of the Harebell Formation (Upper Cretaceous: Maastrichtian), northwestern Wyoming. Cretaceous Research, 17. Kappus, E. and W.C. Cornell (2003). A New Cretaceous Dinosaur Tracksite in Southern New Mexico. Palaeontologia Electronica, 6(3). Lee, Y-N. (1997). Bird and dinosaur footprints in the Woodbine Formation (Cenomanian), Texas. Cretaceous Research, 18. Lockley, M.G. and C. Jennings (1987). Dinosaur Tracksites of Western Colorado and Eastern Utah - Late Cretaceous Coal Mine Tracks. In: Paleontology and Geology of the Dinosaur Triangle. Averett, W.R. (ed.), The Museum of Western Colorado. Lockley, M.G., et al. (2014). A Preliminary Report on a New Dinosaur Tracksite in the Cedar Mountain Formation (Cretaceous) of Eastern Utah. In: Fossil footprints of western North America . Lockley, M.G. and S.G. Lucas (eds.), New Mexico Museum of Natural History and Science Bulletin 62. Lucas, S.G., et al. (2011). Hadrosaur Footprints from the Upper Cretaceous Fruitland Formation, San Juan Basin, New Mexico, And the Ichnotaxonomy of Large Ornithopod Footprints. In: Fossil Record 3. Sullivan, R.M., et al. (eds.). New Mexico Museum of Natural History and Science, Bulletin 53. McCrea, R.T. (2003). Fossil tracks from Tumbler Ridge: a brief history of collaboration between amateurs and academics. Alberta Palaeontological Society, Seventh Annual Symposium. McCrea, R.T. and L.G. Buckley (2008). Fossil vertebrate tracks from the Gorman Creek Formation, northeastern B.C. Alberta Palaeontological Society, Twelfth Annual Symposium. McCrea, R.T., et al. (2014). A 'Terror of Tyrannosaurs': The First Trackways of Tyrannosaurids and Evidence of Gregariousness and Pathology in Tyrannosauridae. PLoS ONE, 9(7). Milner, A.R.C., et al. (2006). Dinosaur Tracks from the Upper Cretaceous Iron Springs Formation, Iron County, Utah. In: Late Cretaceous Vertebrates from the Western Interior. Lucas, S.G. and R.M. Sullivan (eds.), New Mexico Museum of Natural History and Science, Bulletin 35. Parker, L.R. and R.L. Rowley (1989). Dinosaur Footprints from a Coal Mine in East-Central Utah. Reprinted from: Dinosaur Tracks and Traces, Gillette, D.D. and M.G. Lockley (eds.), Cambridge University Press. Phillips, P.L., et al. (2007). Sequence stratigraphic controls on synsedimentary cementation and preservation of dinosaur tracks: Example from the lower Cretaceous (Upper Albian) Dakota Formation, Southeastern Nebraska, U.S.A. Papers in Earth and Atmospheric Sciences, Paper 297. Platt, B.F., et al. (2018). LIDAR-based characterization and conservation of the first theropod dinosaur trackways from Arkansas, USA. PLoS ONE, 13(1). (Thanks to Troodon for finding this one!) Shuler, E.W. (1937). Dinosaur Tracks at the Fourth Crossing of the Paluxy River Near Glen Rose, Texas. Field & Laboratory, SMU, 5(2). Smith, S.D., W.S. Persons and L. Xing (2016). A tyrannosaur trackway at Glenrock, Lance Formation (Maastrichtian), Wyoming. Cretaceous Research, 61. Therrien, F., et al. (2015). Dinosaur trackways from the Upper Cretaceous Oldman and Dinosaur Park formations (Belly River Group) of southern Alberta, Canada, reveal novel ichnofossil preservation style. Can.J. Earth Sci., 52. Wright, J., and M. Lockley (2001). Dinosaur and turtle tracks from the Laramie/Arapahoe formations (Upper Cretaceous), near Denver, Colorado, USA. Cretaceous Research, 22. Cretaceous Tracks and Trackways - South America/Central America/Caribbean Buck, P.V., et al. (2017). 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