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Found 30 results

  1. BigBrook ID help needed

    Good evening. Another morning spent in Big Brook. Did ok with the shark teeth. 3 questions: 1) 15/16th inches I think is a sawfish rostal. 2). 3/8 inch piece of jawbone with 2 teeth which I think is fossil fish but have no idea which, and 3) a 1 1/8 inch piece of bone I guess to be modern. Can you identify the animal? Thank you for sharing your knowledge.
  2. IMG_9835.JPG

    From the album Huge Big Brook Fossil Collection

    Spearhead, Crow shark teeth, goblin shark teeth, xiphactinus teeth, mososaur, enchodus, arrowhead, pyctnodontis plates, crab claws, ray tooth, sawfish teeth, semi-modern incisor, semi-modern unknown tooth, bone, jaw fragment with enchodus tooth, toe bone, fossil scute
  3. Fish teeth?

    Hello all found at big brook 4 looks like a sawfish tooth 3 maybe also sawfish with no rostrum 1 & 2 I have no idea and hope you can help sorry for the lousy photos
  4. Sawfish vertebra

    From the album Post Oak Creek

    I erroneously identified this as a shark centrum, however it doesn't have any foramina on the lateral surface, so it must be a sawfish.
  5. Shark teeth (and sawfish)

    From the album North Sulphur River

    Shark teeth (at least in my experience) are really hard to find at NSR. The best method would probably be to sift for them in gravel, but I've yet to do that. The odd looking one is actually the base of sawfish rostral tooth.
  6. sawfish rostral teeth

    From the album Post Oak Creek

    These are usually found broken - as is for pretty much everything from post oak.
  7. I hit a new spot in Northeast Texas. This area is a mix or cretaceous and pleistocene. The rooted mosasaur tooth and my first croc tooth made my day. Both are super rare for this area. I also found the largest Enchodus jaw I've found since I started hunting four years ago.
  8. Northeast Texas Hunt!

    Fun hunt yesterday. I found some huge broken sawfish teeth, shark teeth, enchodus jaw and teeth, mosasaur verts, big heart clam which I've never found in the Sulphur river area and a killer petrified wood Gary point. It got hot around 2PM so I got out early.
  9. Several NJ Cretaceous Non-Shark pathologies

    Hello TFF, I got a couple items from the Late Cretaceous of NJ that seem to be pathological. The first one, an Anomoeodus phaseolus tooth, seems to be very wrinkly and so I deemed it a patho. That is more of a verification as I haven’t seen a pathological one before. The second is an Ischyrhiza mira rostral blade that has a third carina on one of its faces and a slight flattening (flattening better seen in person). This is also a verification as I just didn’t expect to see a patho rostral. The third one is a bit strange. It is definitely a fish tooth. There are prominent growth cracks on the surface & no striations, which supports Xiphactinus. However, the base doesn’t look exactly elliptical (Xiphactinus) or bulging like in Enchodus. But it does look more like X-fish than Enchodus; it just seems as if one side of the base got flattened out, leading me to think that it could be a pathological Xiphactinus. The base also seems to be somewhat hollow (other than the matrix infill). @non-remanié Thanks guys! Anomoeodus phaseolus:
  10. Finally managed to get out for a few hours when I visited Florida earlier this month. Walked in to a Peace river tributary where I got to spend a few hours shifting gravel while keeping an eye on the local wildlife. Was interesting how different the finds were when compared to the previous site which was about 25 miles further north. Nothing overly special, but was a pleasant way to spend an afternoon. Found a lot of bone fragments this trip, but no dugong which surprised me after my first experience. There were also fewer shark teeth this time around. Not sure what the big bone chunk in the upper left is from as there is very little of the surface left, but the fragment is 4 x 5 x 2.5 inches
  11. I had a fun hike at the North Sulphur River Texas yesterday. I figured it would be picked over but I found a pretty remote spot with my 4x4. The one sawfish tooth I found in a small creek a few days before. Everything else is from yesterday. It was a great day for Cretaceous coprolite (Poo). @GeschWhat The one coprolite is full of fish verts, bones and fins.
  12. A post by @ynot on STH teeth a while back peaked my interest in extant sawfish rostral teeth. The two extant sawfish genera are Pristis and Anoxypristis. There is only a single extant Anoxypristis species, Anoxypristis cuspidata (Knifetooth or Narrow Sawfish). There are 4 extant species of Pristis, Pristis clavata (Dwarf Sawfish), Pristis pectinata (Smalltooth Sawfish), Pristis pristis (Largetooth Sawfish), and Pristis zijsron (Green Sawfish) Last 2016. I borrowed a Pristis pectinata (Smalltooth Sawfish) rostrum from a friend so I could take pictures of it. This rostrum is from a sawfish caught off of the West coast of South Florida many years ago. If you would also like to see pictures of an Anoxypristis cuspidata rostrum check out my previous TFF post at the link below: http://www.thefossilforum.com/index.php?/topic/83865-extant-anoxypristis-cuspidata-knifetooth-or-narrow-sawfish-rostrum/&tab=comments#comment-895466 A Pristis pectinata rostrum is 21-30 % of total sawfish length. Pristis pectinata reach a total length of at least 554 cm with reports of 760 cm total length likely exaggerations. Last 2016. This rostrum is 10” long so it is from a juvenile sawfish. Pristis pectinata rostrums have 20-30 rostral teeth per side. This rostrum has 25/27 rostral teeth (Note some are damaged and/or missing) and is shown below in dorsal and ventral views: The basal view of the rostrum (20 mm by 5 mm) shows placoid scales and a thin layer of skin on the dorsal side and on the ventral side above the cartilage of the rostrum. Dorsal side, placoid scales covering the rostrum surface: Ventral Side, placoid scales covering the rostrum surface: Edit: Note I should have stated that these rostral teeth are smooth without a posterior groove. That is a rostral tooth trait of young Pristis pectinata sawfish. I didn't notice this until I just looked at the rostral teeth again after reading that young Pristis pectinata sawfish rostral teeth don't have the posterior groove in Last, White, de Carvalho, Seret, Stehmann, Naylor 2016 Rays of the World. The below picture shows a first anterior rostral tooth (10 mm) that is smooth without a posterior groove. Below are pictures of 8 different rostral teeth (5 mm to 12 mm vertical height) 6 rostral teeth dorsal views: 2 rostral teeth ventral views: Fossil Pristis cf lathami rostral tooth (2.25”) from the Eocene of Virginia for comparison to the extant Pristis teeth: Unfortunately now Pristis pectinata is a critically endangered species. Over fishing has not only drastically reduced their numbers but it has also drastically reduced the size of the largest members of the species. Populations are now fragmented and this species is considered to be extinct through most of its original range. Marco Sr.
  13. A post by YNOT @ynot on STH teeth peaked my interest in extant sawfish rostral teeth. The two extant sawfish genera are Pristis and Anoxypristis. There is only a single extant Anoxypristis species, Anoxypristis cuspidata (Knifetooth or Narrow Sawfish). There are 4 extant species of Pristis, Pristis clavata (Dwarf Sawfish), Pristis pectinata (Smalltooth Sawfish), Pristis pristis (Largetooth Sawfish), and Pristis zijsron (Green Sawfish) Last 2016. I borrowed an Anoxypristis cuspidata rostrum from a friend so I could take pictures of it. The rostrum is 18” long and is shown below in dorsal and ventral views: The basal view of the rostrum (35 mm by 13 mm) shows a thin layer of grey skin on the dorsal side and a thin layer of yellow skin on the ventral side above the white cartilage of the rostrum. Below are pictures of 8 different rostral teeth (6 mm to 14 mm vertical height) 6 teeth dorsal views: 2 teeth ventral views: Continued in next reply Marco Sr.
  14. Sawfish teeth?

    Was going thru another bag of old stuff and found this tooth and was thinking it had different features than the last sawfish tooth I found, maybe its something else. Here's two sets of views of the newer find. It appears to have very tiny serrations and somewhat stockier and is not oval in cross section but appears more tear drop shaped. Is it a sawfish and is it the same as the earlier one I found? Are either of them Pristis or Anoxypristis? Here's a set of 3 views of the one I had found earlier. Sorry for the varying scales and orientations and angles...I need a permanent setup to make photos more standard and a process..... Regards, Chris .
  15. Sawfish teeth or Reptile teeth?

    I found this teeth in a marine sedimentary sandstone (Cretaceous.Palaeocene) and I don't know what is it.
  16. Sawshark Rostrral Tooth

    A rostral tooth of I. mirs. These are not uncommon, but always a pleasure to find. This one is nicely colored.
  17. big brook nj id please

    I'm assuming worn saw fish? thanks
  18. Cretaceous Sawfish

    This little I. mira oral tooth is a very uncommon find. It was found by fine sifting marl from the bottom of the formation. The rostral teeth of these Cretaceous saw sharks (fish) are common and verts are also occasionally found.
  19. Ramanessin 2-18-17

    Took advantage of the mid-60's sunny forecast Saturday for a drive down to Ramanessin Brook in NJ. Nothing special, seemed to be mostly fragments and there were lots of footprints along the banks, but it was still enjoyable to be outside enjoying the winter reprieve. Tiny sawfish (Ischyrhiza mira) rostral tooth, front looks good, but back is busted up (scale = quarter inch squares) Tiny ammo fragment (front & back)
  20. todays help from big brook nj

    Well today was nice up in the snow at the brook and even running into frank and shane forum members there..and then another couple as my wife and I were leaving.....among some decent shark teeth always find some other interesting things, I'm assuming that the first pic is a sawfish rostral tooth and with talking to shane and frank at the brook possibly coral on the next pics? anyone with info on it and time period.
  21. Onchopristis tooth

    Tooth of a sawfish.
  22. Onchopristis tooth

    Tooth of a sawfish.
  23. 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 May 25, 2018. Class Chondrichthyes - The Cartilaginous Fishes Subclass Elasmobranchii Infraclass Euselachii (Sharks and Rays) Division Neoselachii Superorder Batoidea - Rays, Skates and Sawfishes Order Myliobatiformes - Rays Myliobatiformes - Africa/Middle East Cappetta, H. (1984). Discovery of the Genus Gymnura (Batomorphii, Myliobatiformes) in the Thanetian of the Ouled Abdoun, Morocco. Observations on the Dentition of some Modern Species. Geobios, 17. (Plates not included) Claeson, K.M., C.J. Underwood and D.J. Ward (2013). Ɨ Tingitanius tenuimandibulus, a New Platyrhinid Batoid from the Turonian (Cretaceous) of Morocco and the Cretaceous Radiation of the Platyrhinidae. Journal of Vertebrate Paleontology, 33(5). Claeson, K.M., et al. (2010). First Mesozoic record of the stingray Myliobatis wurnoensis from the late Cretaceous of Mali and a phylogenetic study of Myliobatidae (Batoidea) incorporating dental characters. Acta Palaeontologica Polonica, 55(4). Myliobatiformes - Asia/Malaysia/Pacific Islands Adnet, S., et al. (2008). First myliobatiform teeth (Elasmobranchii, Neoselachii) from the Pondaung Formation (late middle Eocene) of Central Myanmar. N.Jb.Geol.Palaont. Abh., Vol.247/3. Hatai, K. M. Murata and K. Masuda (1965). 485. Sting Ray and Eagle Ray from the Tatsunokuchi Formation (Pliocene) in Sendai City, Miyagi Prefecture, Japan. Trans.Proc.Palaeont.Soc. Japan, N.S., Number 57. Marrama, G., et al. (2018). Anatomy, relationships and palaeobiogeographic implications of the first Neogene holomorphic stingray (Myliobatiformes: Dasyatidae) from the early Miocene of Sulawesi, Indonesia, SE Asia. Zoological Journal of the Linnean Society, xx. Mishra, V.P. (1980). A New Species of Myliobatis and Some Shark Teeth from the Middle Eocene of Kutch, Western India. Journal of the Palaeontological Society of India, Vols. 23 & 24. Myliobatiformes - Australia/New Zealand Myliobatiformes - Europe (including Greenland and Siberia) Antunes, M.T. and A.C. Balbino (2006). Latest Miocene Myliobatids (Batoidea, Selachii) from the Alvalade Basin, Portugal. Cainozoic Research, 4(1-2). Bor, T.J. (1990). A New Species of Mobulid Ray (Elasmobranchii, Mobulidae) from the Oligocene of Belgium. Contr. Tert. Quatern. Geol., 27(2-3). Hovestadt, D. and M. Hovestadt-Euler (2010). Urobatis molleni Nov.Sp. (Chondrichthyes, Myliobatiformes, Urolophidae) in the Eocene of Belgium. Geominpal Belgica, 1(3). Myliobatiformes - North America Cicimurri, D.J. (2010). On the dentition of Meridiana convexa Case (Myliobatoidea), an extinct Early Eocene ray from the United States. Cainozoic Research, 7(1-2). Cicimurri, D.J. and J.A. Ebersole (2015). Two new species of Pseudaetobatus Capetta, 1986 (Batoidei, Myliobatidae) from the southeastern United States. Palaeontologia Electronica, 18.1.15A. Cook, T.D., et al. (2014). A New Genus and Species of Freshwater Stingray (Myliobatiformes, Dasyatoidea) from the Latest Middle Eocene of Utah, U.S.A. Journal of Paleontology, 88(3). De Carvalho, M.R., J.G. Maisey and L. Grande (2004). Freshwater Stingrays of the Green River Formation of Wyoming (Early Eocene), With the Description of a New Genus and Species and an Analysis of Its Phylogenetic Relationships (Chondrichthyes: Myliobatiformes). Bulletin of the American Museum of Natural History, Number 284. de Santana, F.R., D.J. Cicimurri and J.A. Barbosa (2011). New Material of Apocopodon sericeus Cope, 1886 (Myliobatiformes, Myliobatidae) from the Paraiba Basin (Northeastern Brazil) and South Carolina (USA) With a Reanalysis of the Species. PalArch's Journal of Vertebrate Palaeontology, 8(6). McNulty, C.L. (1964). Hypolophid Teeth from the Woodbine Formation, Tarrant County, Texas. Eclogae Geologicae Helvetiae, 57(2). Myliobatiformes - South America/Central America/Caribbean Adnet, S., R.S. Gismondi and P.-O. Antoine (2013). Comparisons of dental morphology in river stingrays (Chondrichthyes: Potamotrygonidae) with new fossils from the middle Eocene of Peruvian Amazonia rekindle debate on their evolution. Naturwissenschaften. Cione, A.L., M. Tejedor and F.J. Goin (2012). A new species of the rare batomorph genus Hypolophodon (? latest Cretaceous to earliest Paleocene, Argentina). N.Jb.Geol.Palaont. Abh., 267/1. de Santana, F.R., D.J. Cicimurri and J.A. Barbosa (2011). New Material of Apocopodon sericeus Cope, 1886 (Myliobatiformes, Myliobatidae) from the Paraiba Basin (Northeastern Brazil) and South Carolina (USA) With a Reanalysis of the Species. PalArch's Journal of Vertebrate Palaeontology, 8(6). General Myliobatiformes Adnet, S., et al. (2018). Teeth, fossil record and evolutionary history of the cowtail stingray Pastinachus Ruppell, 1829. Historical Biology, 2018. Adnet, S., et al. (2012). Evolutionary history of the devilrays (Chondrichthyes: Myliobatiformes) from fossil and morphological inference. Zoological Journal of the Linnean Society, 166. Bertozzi, T., M.S.Y. Lee and S.C. Donnellan (2016). Stingray diversification across the end-Cretaceous extinctions. Memoirs of Museum Victoria, 74. Order Rajiformes - Skates De Carvalho, M.R. (2004). A Late Cretaceous thornback ray from southern Italy, with a phylogenetic reappraisal of the Platyrhinidae (Chondrichthys: Batoidea).In: Mesozoic Fishes 3 - Systematics, Paleoenvironments and Biodiversity. Arratia, G. and A. Tintori, eds. Herman, J., et al. (1994). Part B: Batomorphii No.1A: Order Rajiformes - Suborder Rajoidei- Family: Rajidae. In: Contributions to the comparative morphology of teeth and other ichthyodorulites in living supra-specific taxa of Chondrichthyan fishes. Stehmann, M. (ed.), Bulletin De L'Institut Royal Des Sciences Naturelles de Belgique, Biologie 64. (Note: While this article deals with living types of rays, it contains excellent references to ray tooth morphology and has a large number of pictures of ray teeth for comparative purposes! Thanks to doushantuo for pointing this one out!) Long, D.J. (1994). Quaternary colonization of Paleogene persistence?: historical biogeography of skates (Chondrichthyes: Rajidae) in the Antarctic ichthyofauna. Paleobiology, 20(2). Siverson, M. and H. Cappetta (2001). A Skate in the Lowermost Maastrichtian of Southern Sweden. Palaeontology, Vol.44, Part 3. Vullo, R. and D. Néraudeau (2008). When the "primitive" shark Tribodus (Hybodontiformes) meets the "modern" ray Pseudohypolophus (Rajiformes): the unique co-occurrence of these two durophagous Cretaceous selachians in Charentes (SW France). Acta Geologica Polonica, Vol.58, Number 2. Order Rhinobatiformes - Guitarfishes Bor, T.J. (1983). A New Species of Rhinobatos (Elasmobranchii, Batomorphii) from the Upper Maastrichtian of the Netherlands and Belgium. Geologie en Mijnbouw. Brito, P.M., M.E.C. Leal and V. Gallo (2013). A New Lower Cretaceous Guitarfish (Chondrichthyes, Batoidea) from the Santana Formation, Northeastern Brazil. Boletim do Museo Nacional, Number 76. Claeson, K.M., D.J. Ward and C.J. Underwood (2010). 3-D digital imaging of a concretion-preserved batoid (Chondrichthyes, Elasmobranchii) from the Turonian (Upper Cretaceous) of Morocco. C.R. Palevol, 9. Everhart, M.J. (2007). New stratigraphic records (Albian-Campanian) of Rhinobatos sp. (Chondrichthyes; Rajiformes) from the Cretaceous of Kansas. Transactions of the Kansas Academy of Science, Vol.110, Numbers 3/4. Langston, W. (1970). A Fossil Ray, Possibly Myledaphus (Elasmobranchii: Batoidea) from the Late Cretaceous Oldman Formation of Western Canada. National Museums of Canada, Publications in Palaeontology, Number 6. Maisey, J.G. (1976). The Jurassic Selachian Fish Protospinax Woodward. Palaeontology, Vol.19, Part 4. Order Torpediniformes - Electric Rays Marrama, G., et al. (2018). Revision of Eocene electric rays (Torpediniformes, Batomorphii) from the Bolca Konservat-Lagerstätte, Italy, reveals the first fossil embryo in situ in marine batoids and provides new insights into the origin of trophic novelties in coral reef fishes. Journal of Systematic Palaeontology, Vol.16, Number 14. (Thanks to doushantuo for finding this one!) Ward, D.J. (1983). Additions to the fish fauna of the English Palaeogene. 4. A new batoid genus from the Bracklesham Group of Selsea, Sussex. Tertiary Research, 5(2). General Batoidea Ashliman, N.C., et al. (2012). Body plan convergence in the evolution of skates and rays (Chondrichthyes: Batoidea). Molecular Phylogenetics and Evolution, 63. Dean, M.N., J.J. Bizarro and A.P. Summers (2007). The evolution of cranial design, diet and feeding mechanisms in batoid fishes. Integrative and Comparative Biology, Vol.47, Number 1. Deynat, P.P. and P. Brito (1994). Revision of the Dermal Tubercles of Rays (Chondrichthyes: Batoidea) from the Parana Basin, Tertiary of South America. Annales de Paleontologie (Vert.-Invert.), 80(4). Guinot, G., et al. (2012). Batoids (Elasmobranchii: Batomorphii) from the British and French Late Cretaceous. Journal of Systematic Palaeontology, Vol.10, Issue 3. Hovestadt, D.C . and M. Hovestadt-Euler (1995). Additions to the fauna of the Boom Clay Formation of Belgium (Rupelian, Oligocene). Taxonomic adjustments on the Scyliorhinidae and Rajoidei, discovery of a dasyatid species (Pisces, Chondrichthyes) and of a cucrulionid species (Insecta, Coleoptera). Belgian Geological Survey, Professional Paper 278. Kachacha, G., et al. (2017). Revision of the fossil batomorphs from the Cretaceous of Lebanon, and their impact on our understanding of the early step of the evolution of the clade. Research & Knowledge, Vol.3, Number 2. Lowemark, L. (2015). Evidence for targeted elasmobranch predation on thalassinidean shrimp in the Miocene Taliao Formation, NE Taiwan. Lethaia, Vol.48. Sharma, K.M. and R. Patnaik (2013). Additional Fossil Batoids (Skates and Rays) from the Miocene Deposits of Baripada Beds, Mayurbhang District, Orissa, India. Earth Science India, Vol.6 (IV). Tiwari, R.P. and V.Z. Ralte (2012). Fossil batoid and teleost fish remains from Bhuban Formation (Lower to Middle Miocene), Surma Group, Aizawl, Mizoram. Current Science, Vol.103, Number 6. Underwood, C.J., M.A. Kolmann and D.J. Ward (2017). Paleogene Origin of Planktivory in the Batoidea. Journal of Vertebrate Paleontology, e1293068. Underwood, C.J., et al. (2015). Development and Evolution of Dentition Pattern and Tooth Order in the Skates and Rays (Batoidea: Chondrichthyes). PLoS ONE, 10(4). van Netten, H.H. and J.W.F. Reumer (2009). Bite marks on early Holocene Tursiops truncatus fossils from the North Sea indicate scavenging by rays (Chondrichthyes, Rajidae). Netherlands Journal of Geosciences, 88-3. Wing, E. (1966). Fossil Skates and Rays of Florida. The Plaster Jacket, Number 2. (Thanks to Nimravus for pointing me to this one!) Clade Pristiorajea - Rhinopristiformes (Sawfishes) and Sclerorhynchiformes Order Rhinopristiformes - Sawfishes Carrillo-Briceno, J.D., et al. (2015). Sawfishes and Other Elasmobranch Assemblages from the Mio-Pliocene of the South Caribbean (Urumaco Sequence, Northwestern Venezuela). PLoS ONE, 10(10). Collareta, A., S. Casati and A. Di Cencio (2017). A Pristid Sawfish from the Lower Pliocene of Lucciolabella (Radicofani Basin, Tuscany, Central Italy). Atti Soc.Tosc.Sci.Nat.Mus. Serie A, 124. Deynat, P.P. (2005). New data on the systematics and interrelationships of sawfishes (Elasmobranchii, Batoidea, Pristiformes). Journal of Fish Biology, 66. Farres, F. and H.L. Fierstine (2009). First record of the extinct sawfish Propristis schweinfurthi Dames, 1883 (Batoidea: Pristiformes: Pristidae) from the middle Eocene of Spain. Palaontologische Zeitschrift. Schaeffer, B. (1963). Cretaceous Fishes from Bolivia, with Comments on Pristid Evolution. American Museum Novitates, Number 2159. Order Sclerorhynchiformes Arambourg, C. (1940). The Group of the Ganopristines. Bulletin de la Societe Geologique de France, Ser.5, 10. (Plates not included.) Delgadillo-Escobar, A.A., et al. (2015). The first record of Onchosaurus (†Sclerorhynchidae) from the Late Cretaceous of northern Mexico. Boletín de la Sociedad Geológica Mexicana, Vol.67, Number 1. Keyes, I.W. (1977). Records of the Northern Hemisphere Cretaceous Sawfish Genus Onchopristis (Order Batoidea) from New Zealand. New Zealand Journal of Geology & Geophysics, Vol.20, Number 2. Kirkland, J.I. and M.C. Aguillon-Martinez (2002). Schizorhiza: a unique sawfish paradigm from the Difunta Group, Coahuila, Mexico. Revista Mexicana de Ciencias Geologicas, Vol.19, Number 1. Knight, J.L., D.J. Cicimurri, and R.W. Purdy (2007). New Western Hemisphere Occurrences of Schizorhiza Weiler, 1930 and Eotorpedo White, 1934 (Chondrichthyes, Batomorphii). Paludicola, 6(3). Kriwet, J. and S. Klug (2012). Presence of the extinct sawfish Onchosaurus (Neoselachii, Sclerorhynchiformes) in the Late Cretaceous of Peru with a review of the genus. Journal of South American Earth Sciences, 39. Kriwet, J. and K. Kussius (2001). Paleobiology and Paleobiogeography of Sclerorhynchid Sawfishes (Chondrichthyes, Batomorphi). Revista Española de Paleontología, no. extraordinario. Pereira, A.A. and M.A. Medeiros (2008). A New Sclerorhynchiform (Elasmobranchii) from the Middle Cretaceous of Brazil. Rev.bras.paleontol., 11(3). Smith, M.M., et al. (2015). Early development of rostrum saw-teeth in a fossil ray tests classical theories of the evolution of vertebrate dentitions. Proc.R.Soc. B, 282. Suárez, M.E. and H. Cappetta (2004). Sclerorhynchid teeth (Neoselachii, Sclerorhynchidae) from the Late Cretaceous of the Quiriquina Formation, central Chile. Andean Geology, Vol.31, Number 1. Underwood, C., M.M. Smith and Z. Johanson (2015). Sclerorhynchus atavus and the convergent evolution of rostrum-bearing chondrichthyans. In: Arthur Smith Woodward: His Life and Influence of Modern Vertebrate Palaeontology. Johanson, Z., et al. (eds.), Geological Society, London, Special Publications, 430. General Pristiorajea Welten, M., et al. (2015). Evolutionary origins and development of saw-teeth on the sawfish and sawshark rostrum (Elasmobranchii; Chondrichthyes). R.Soc.Open Sci., 12. Wueringer, B.E., L. Squire and S.P. Collin (2009). The biology of extinct and extant sawfish (Batoidea: Sclerorhynchidae and Pristidae). Rev. Fish Biol. Fisheries, 19. Superorder Selachimorpha Order Pristiophoriformes - Sawsharks (not Sawfish) Applegate, S. and T. Uyeno (1968). The First Discovery of a Fossil Tooth belonging to the Shark Genus Heptranchias, with a New Pristiophorus Spine, Both from the Oligocene of Japan. Bull.Nat.Sci.Mus. Tokyo, 11(2). Keyes, I.W. (1982). The Cenozoic sawshark Pristiophorus lanceolatus (Davis) (Order Selachii) of New Zealand and Australia, with a review of the phylogeny and distribution of world fossil and extant pristiophoridae. New Zealand Journal of Geology & Geophysics, Vol.25. Keyes, I.W. (1979). Ikamauius, a new genus of fossil sawshark (Order Selachii: Family Pristiophoridae) from the Cenozoic of New Zealand. New Zealand Journal of Geology & Geophysics, Vol.22, Number 1. Welten, M., et al. (2015). Evolutionary origins and development of saw-teeth on the sawfish and sawshark rostrum (Elasmobranchii; Chondrichthyes). R.Soc.Open Sci., 12.
  24. GMR Saw Fish Tooth (Ischyrhiza Mira)

    From the album GMR Finds

    Conservation Status: Extinct Scientific Classification: Family: Sclerorhynchidae Genus: Ischyrhiza Species: Mira Common Name: Saw Fish Fossil Period: Cretaceous Formation: Yorktown (within Greenville, NC) Formation Period: Late Miocene to Early Pliocene. Found: November of 2015 at GMR in Greenville, NC
  25. From the album Cretaceous

    Ischyrhiza mira (sawfish rostral spine) Upper Cretaceous Mount Laurel Formation Big Brook Colt's Neck, NJ.