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I saw this potential fossil in the Jurassic age Navajo Sandstone in Zion National Park in Utah. I'm sorry that there is only one picture with no scale. I was hurrying down the precarious Angel's Landing trail with a long line of people behind me, so I only had time for a quick picture. The feature is probably about ~12 inches long, and I believe that it is situated on the plane of a cross-bed in a dune structure (example of the cross-bedded sandstone is also pictured). This feature might just be some sort of iron precipitation, but it looked so similar to an invertebrate trace fossil that I am not sure. Any thoughts on what it could be?
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From the album: Fossildude's Purchased/Gift Fossils
Dactylioceras tenuicostatum. Jurassic A gift from my good friend and fossil hunting partner, Jeffrey P. Thank you, @Jeffrey P ! It looks great in my display case.© 2021 Tim Jones
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These are from the Cretaceous Greensands of Shanklin and Jurassic of Gilbert's Grave in the UK. I'm told that the first is a lamellibranch and the second is a rhyonachellid...the rest are Brachiopods. Perhaps @Tidgy's Dad will comment? Thanks Greg
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- cretaceous
- gilberts grave
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Hi guys, I have two ammonites here which I can’t identify, I was wondering if anyone could help thanks 1. This ones from Burton bradstock, oolite, bajocian 2. These are from france, I don’t know the geological setting so a species ID is probably impossible, but if anyone knew a family I would still greatly appreciate it 3. this is toarcian, from Whitby, but it isn’t the typical dactylocerous commune, the ribbing is more fineand its thicker, I know it isn’t one but it looks almost like a nodioloceras, what do you think ?
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Hello everyone ! I would like to have some opinions on this tooth of Camarasaurus. It measures 2.6 inches and comes from the Morrison Formation.
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- camarasaurus
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Montana State Museum of the Rockies - July 2021
AlexSciChannel posted a topic in A Trip to the Museum
So over the past few days I was visiting Bozeman from Raleigh North Carolina as I was visiting the MSU campus because I've been accepted to start as a freshman in autumn 2021. And I hope you know what I am trying to major in. I mean you know what forum we're on I don't have to spell it out. Anyway, in that time I managed to spend all day visiting the Museum of the Rockies which is considered one of the Mecca halls for paleontology. Our crazy old boi Jack used to be Prof and curator there before... well you know. My home museum, the NC Museum of Natural Sciences are taxonomic lumpers when it comes to paleontology but they are passive lumpers. They are nothing compared to what the MOR has going on holy snarge I was surprised. I like going to different museums like this because it shows different perspectives based on findings that vary by institution. While I don't agree with a lot of it, it's healthy to expose oneself to different ideas and conclusions. Also I just couldn't help but feel giddy in the midst of all these dinosaurs. I'll update this post with pictures in a few moments... I will also post what the info cards on the exhibits state about each specimen. Here is Big Mike. A metal replica of MOR 555 commonly known as the Wankel although now more known as the Nation's T. rex since the og skeleton's move to the Smithsonian. I spent at least 30 minutes admiring the sculpt of this beautiful beast alone. Our first is a tibia of a Hadrosaur indet. found in 80 mya rock in Chotaeu, Montana so likely the Two Medicine Formation however this is unique because this is from it's lower strata which we don't know much about that's why it isn't identified as Maiasaura, as that dinosaur lived later. Here are some nice trace fossils and geology stuff, Here's the Precambrian globe Here's how sediments move through time. There's dioramas too. Starting with the Cambrian of course with Anomalocaris and working our way up. Here we're getting some Ordivician and Silurian description, Devonian like creatures. Although Coelocanths first evolved 400 mya they live all the way up to the present day. Stethocanthus below Next we start going in depth into the dinosaurs more updates coming stay tuned...
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Somerset fossil hunters 'need to be better informed' BBC News, July 27, 2021 United Kingdom Fossil Network Yours, Paul H.
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I went also into a quarry with nice Bajocian fossils
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A very nice week holidays in soutwest France this week one of my biggest find and a nice mortality plate
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Amateur fossil hunters get record haul of Jurassic starfish and crinoids in Cotswolds, United Kingdom
Oxytropidoceras posted a topic in Fossil News
Largest find of Jurassic starfish and relatives ever discovered in the UK excavated by Natural History Museum British Natural History Museum Part-time adventurers’: amateur fossil hunters get record haul in Cotswolds More than 1,000 scientifically significant specimens taken from former quarry after discovery. Miranda Bryant, The Guardian, July 20, 2021 Yours, Paul H.- 9 replies
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Trying to identify Jurassic or Triassic fossil from Somerset UKSomerset
Martin_the_paeleo posted a topic in Fossil ID
Hi all, I am trying to identify this fossil from a photo taken at Blue Anchor, Somerset. It shod be Triassic or Jurassic. At first I thought it might be a marine creature but it, doesn't look like a skeleton, so I thought possibly a large plant? It is perhaps 0.5 to 0.75 metres across. Many thanks.
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There are additional unidentified conchostraca (clam shrimps, arthropods) on the slab. The age of the Daohugou strata has been notoriously difficult to determine, and a number of studies have produced conflicting results. Gao and Shubin, 2001 reported an Argon-argon dating age of 164 ±4 million years ago (Middle to Late Jurassic, Bathonian to Oxfordian); this opinion is now widely accepted. Taxonomy according to Fossilworks.org. Diagnosis for the family OSMYLIDAE Leach, 1815 according to Winterton et al., 2019 p. 13. “Adult head with dorsal tentorial arms weakly developed; ocelli usually present, medial ocellus sometimes reduced (e.g., Paryphosmylus) or all ocelli completely absent (e.g., Gumillinae); palpimaculae absent; antennae filiform; wings with basal subcostal veinlet simple in costal area, sometimes forked but never recurrent; single basal crossvein (sc-r) between Sc and R, rarely more than one (e.g., Porismus, Archaeosmylidia); Sc and RA fused apically and joining costal margin before wing apex in both wings; single branch of RP, subsequently pectinately branched (5 or more branches); FW radial branches frequently curved posteriorly in apical half of wing, sometimes sinuous; FW medial vein fork variably placed along wing, HW medial vein fork near wing base; FW CuP pectinately (rarely dichotomously) branched; cubital field relatively large in both wings; nygmata typically present; trichosors present in both wings (rarely reduced to apical margin); end twigging along wing margin present, sometimes extensive and multi-layered; jugal lobe present; female gonocoxite 9 (gx 9) (i.e., gonopophysis lateralis) elongate and with terminal stylus; female with a pair of sclerotised spermathecae; male genitalia with well-developed arched gonarcus with paired entoprocesses fused laterally; mediuncus curved; parameres present or absent, sometimes fused into single arched sclerite; larva (Fig. 1) with straight, highly elongate jaws; gular-like sclerite absent; seven Malphigian tubules, of which five arge incorporated into the cryptonephridium; eversible claws present on paired prolegs on last abdominal segment.” Identified by Alex Khramov (Borissiak Paleontological Institute of the Russian Academy of Sciences, Moscow, Russia): “Osmylidae, but definitely not Ponomarenkius or any other Kempyninae. Which genus or subfamily I cannot tell you - too fragmentary preservation and, moreover, there are many undescribed osmylids in Daohugou, so probably your specimen is one of them.” References: Gao K Q, Shubin N. (2001): Late Jurassic salamanders from Northern China. Nature, 410: 574–577. Winterton, Shaun L., Martins, Caleb C., Makarkin, V., Camacho, Adrian A., & Wang, Yongjie (2019): Lance lacewings of the world (Neuroptera: Archeosmylidae, Osmylidae, Saucrosmylidae): review of living and fossil genera. Zootaxa 4581 (1): 001–099. https://doi.org/10.11646/zootaxa.4581.1.1 .
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Looking for info on Temnodontosaurus eurycephalus
pachy-pleuro-whatnot-odon posted a topic in Questions & Answers
Probably one of the most enigmatic species of Temnodontosaurus is Temnodontosaurus eurycephalus, owing to only one skull ever having been found. This particular species is often described as a snub-nosed temnodontosaur with massive teeth and heavy jaw muscles that it probably used to hunt other ichthyosaurs (and other marine reptiles). Its holotype is currently held by the Natural History Museum in London, with the below being some images of it, taken off of Wikipedia: My interest with it, at present, lies with its dentition, with the morphology of its teeth. For I've seen some truly massive teeth and equally massive roots come out of Lyme Regis that I currently consider to belong to T. platyodon based on specimens labelled as such in the NHM collections (see images below for illustration, but please note that Ichthyosaurus platyodon is an old synonym for T. platyodon). And while these teeth seem morphologically similar to the teeth of Mary, Tony Gill's T. platyodon specimen (image below; source), I find myself wondering how these teeth compare to those of T. eurycephalus. Unfortunately, however, I've been able to find very little information or quality photographs on this particular species. I'd therefore like to ask if anybody here has any photographs - in particular crisp/detailed ones of the dentition - or articles (regrettably, I can't access pay-walled) that they'd be willing to share. Thanks in advance!
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Had a great day today at Saltwick Bay, after a little while scratching around picking up Dactys, I split a couple of nice big Hildoceras, one of which I’ve left with the shop in town to get tidied up. While looking around to try to beat my finds, my daughter found a little piece of gyrosteus bone. After stopping to do a bit of splitting (including a nice little pyrite Dactylioceras) we headed back and daughter was really pleased to find a slightly worn little ichthyosaur vertebra. That refocused the eyes and I spotted a partial ichthy skull in the shale, once we’d got over the excitement we scoured the area for more. The only other thing we found that looked like bone was this (top six pictures), could it be bone or is it something else or nothing? Thank you for looking.
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Hi all! This is another report from Oxfordian quarries in the vicinity of Moscow. Previous 1 (Peski) Previous 2 (Timonino) Peski again. If you read my fossil sites overview, you know that Peski quarry is a unique site where you could find lots of Carboniferous fossils, Middle Jurassic dinosaurs, calcitic Callovian ammonites and very good Oxfordian gastropods. The latter are the most numerous and easier to search for. My trip took place in April and was mostly a success with a good variety of finds
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- cyclocrinus
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Hi all, I visited Aust Cliff in South Gloucestershire, UK for a couple of hours last week. I wasn't expecting much as I know how heavily collected it is, but got a few bits of interest which I was happy with under the circumstances. I'd be interested in educated takes on a couple of bits of bone bed I found there at least, especially this first piece that contains what I believe to be multiple bone fragments as well as coprolite pieces and lots of small black fragments - not sure if scales, teeth or what. Here's a view showing what I imagine is one end of a reptile limb bone - could this be Pachystropheus? And on the other side are a couple of embedded chunks that have the honeycomb texture of bone but without the outer coating (not sure of the technical terms here!) No chance of identifying such things I presume, beyond 'yes it's bone'?
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Tomas Holtz published this paper that looks at theropod assemblages in most of the faunas during the Jurassic and Cretaceous period. You an take whatever you like from this document but what I found interesting was his presentation of the dinosaur communities (shown by sizes and which ones not present) in the different faunas (starts at line 1178) Examples below: https://tspace.library.utoronto.ca/handle/1807/106039 I understand why he excluded Nanotyrannus but not sure why Troodon was not included in the HC and Lance. He also excluded Zapsalis from the HC, JR and LC. good move since its not really valid. Paronychodon or Richardoestesia isosceles were not listed, kind of understand because of the uncertainty around these taxons.
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Hi all! You know I visit my favorite Volga river site (Ulyanovsk Oblast) more or less often, but this time I decided to give a try to another well-known Jurassic-Cretaceous site on the Volga river, located in the nearby Samara Oblast (city of Syzran). It's famous for its iridescent ammonites as well as marine reptile finds. I hoped to discover a real alternative to the Ulyanovsk site particularly as the conditions are very similar: surface collecting on river bank. Here the Ulyanovsk site is to the north, Syzran to the south. The latter is home to two distinct locations: in the city itself (Oxfordian-Volgian, 2km) and by the Kashpir village (to the south): Volgian to Barremian, 4 km.
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Paper by Phil Mannion et al. that supports the validity of the 24 recognized Sauropod species in the Morrison Formation. Some authors have suggested this number is well overestimated and represent growth series. https://royalsocietypublishing.org/doi/10.1098/rsos.210377
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- jurassic
- morrison formation
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There are additional unidentified conchostraca (clam shrimps, arthropods) on the slab. The age of the Daohugou strata has been notoriously difficult to determine, and a number of studies have produced conflicting results. Gao and Shubin, 2001 reported an Argon-argon dating age of 164 ±4 million years ago (Middle to Late Jurassic, Bathonian to Oxfordian); this opinion is now widely accepted. Taxonomy according to Fossilworks.org. Emended diagnosis for Choristopsychidae according to Qiao et al., 2013, p. 93: "Forewing broad oval or subtriangular, field between C and ScP comparatively broad; ScP well developed and forked twice, forming three long branches; RA unforked, one crossvein between ScP and RA and between RA and RP; RP and MA both with two branches; MP with five branches, and the MP4+5 forking basal to the MP2+3 forking; MP and CuA merged at the base; CuA strongly bent at its mid point; an oblique crossvein between CuA and CuP; a curved crossvein between the midpoint of CuA and MP5; CuP, 1A and 2A almost parallel. Hind wing, similar in shape to the forewing but slightly smaller, ScP short, forked twice, the second bifurcation coalesces with RA for a short distance; RP and MA both with two branches; MP with five branches, the stem of MP4+5 forked earlier than that of forewing, and with a crossvein to CuA; CuA almost straight. Head, oviform with big and oval compound eyes; antennae long and filiform; small chewing mouthpart. Thorax: prothorax smaller than mesothorax and metathorax. Legs: long and slender, all legs nearly of the same shape, but hind legs longer than fore legs and mid legs, and femora wider than tibia, and tibia longer than femora. Abdomen slender, tapering apically, about eleven segments and the female terminal segment with cercus." Choristopsyche asticta, line drawing of the holotype from Qiao et al., 2013, p. 100. Identified by Prof. A. Rasnitsyn (Russian Academy of Sciences) as Choristopsyche cf. asticta Qiao et al., 2013. Reference: Gao K Q, Shubin N. (2001): Late Jurassic salamanders from Northern China. Nature, 410: 574–577. Martynov, A. V. (1937): Liassic insects from Shurab and Kisyl-Kiya, Part I, Various orders except Blattodea and Coleoptera. Akademiya Nauk SSSR, Trudy Paleontologicheskogo Instituta 7: 1-178. Qiao, X., Shih, C. K., Petrulevičius, J. F., and Ren, D. (2013): Fossils from the Middle Jurassic of China shed light on morphology of Choristopsychidae (Insecta, Mecoptera). ZooKeys 318: 91-111. link
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Taxonomy according to fossilworks.org. Diagnosis for the genus according to Bartram, 1977 (p. 140, excerpts): "Large, elongate macrosemiid fishes; skull roof free from ganoine; supratemporals greatly reduced; cephalic division of main lateral line and supratemporal commisure exposed by fenestrae; vomers bearing a transverse row of stout pointed teeth and a pair of large blunt teeth; ventral parts of anterior three infraorbitals expanded and overlapping the maxilla; gape very small, the quadrate articulation lying in front of the orbit ... dorsal fin single, extending from the occiput to the base of caudal fin, with between 32 and 39 rays each bearing denticles, leading ray proceeded by two basal fulcra, fringing fulcra absent; region immediately on either side of dorsal fin devoid of scales; scales rhomboid, secondary transverse rows intervening between primary rows above the lateral line, scales below lateral line forming a pattern of rectangles." Line drawing from Bartram, 1977, p. 141. Identified by oilshale using Bartram, 1977. Macrosemius is easily recognized among the fishes of Solnhofen by the continuous dorsal fin. References: Agassiz, L. (1843): Recherches Sur Les Poissons Fossiles. Tome I (livr. 18). Imprimerie de Petitpierre, Neuchatel xxxii-188. Bartram, A. W. H. (1977): The Macrosemiidae, a Mesozoic family of holostean fishes. Bulletin of the British Museum (Natural History), Geology Series 29:137–234. Ebert, M., Lane, Jennifer A. & Kölbl-Ebert, Martina (2016): Palaeomacrosemius thiollieri, gen. et sp. nov., a new Macrosemiidae (Neopterygii) from the Upper Jurassic of the Solnhofen Archipelago (Germany) and Cerin (France), with a revision of the genus Macrosemius. Journal of Vertebrate Paleontology, DOI: 10.1080/02724634.2016.1196081.
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Part and counterpart of the same fossil. There are additional unidentified conchostraca (clam shrimps, arthropods) on the slabs. The age of the Daohugou strata has been notoriously difficult to determine, and a number of studies have produced conflicting results. Gao and Shubin 2012 reported an Argon-argon dating age of 164 ±4 million years ago (Middle to Late Jurassic, Bathonian to Oxfordian), this opinion is now widely accepted. Taxonomy according Fossilworks.org. Line drawing from Liang et al., 2009, p.20. Description according to Liang et al., 2009, p. 19: “Large Species (forewing length/width: 21.1–26.0mm/6.5–8.0mm; hind wing length/width: 21.0–24.0mm/7.0–8.3mm; head length/width: 3–4.6mm/2–2.5mm; pronotum length/width: 5–6.2mm/4.5mm–5.8mm), with body strongly sclerotised. Head base wide and coloured, eyes located basally, partially covered by pronotum; ocelli invisible. Pronotum vaulted, slightly elongate with dark coloration at center and at margins. Veins dark, intercalaries and cross-veins distinct. Forewing with expanded venation. Area between anterior wing margin and Sc very long and narrow, Sc branched; R with undifferentiated Rs, does not reach apex; CuP slightly curved. Anal veins with tertiary branches, the base of anal region colored. Diagonal fold present. Hind wing with simple Sc; R differentiated into R1 and well-developed Rs; M reduced to few, usually 2 branches. CuA basal most branches strong, CuP simple, straight; anal lobe with fan-like pleating, A1 simple. Reticulations present in CuA-CuP space, joined with intercalaries. Body wide. Abdominal segments long, with parallel margins. Cerci multi-segmented, the last three segments longest. Ovipositor outer valves internalized.“ Identified by oilshale using Liang et al., 2009. References: Liang, J. H., Vršanský, P., and Ren, D. (2009): A new Jurassic carnivorous cockroach (Insecta, Blattaria, Raphidiomimidae) from the Inner Mongolia in China. Zootaxa 1974:17-30. Gao, K. -Q. and Shubin, N. H. (2012): Late Jurassic salamandroid from western Liaoning, China. Proceedings of the National Academy of Sciences. 109 (15): 5767–72.
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I found this on the port mulgrave coast of yorkshire. It is Jurassic What could it be?? 19cm long and 2.5cm across Patrick
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Found this fossil while digging in the Delintment Lake are in Oregon, any help would be great.
Volksburgs posted a topic in Fossil ID
My wife found this fossil while we were digging for ammonites up by Delintment Lake in Oregon. I believe this area is from the Jurassic period. Thanks for any help. I will post other pictures of the ammonites we found. Also, maybe someone can tell me if there are ammonites under these raised round pieces that we brought home. Figured I would give it a shot at trying to uncover them.
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Agaleus + Other Jurassic Shark Teeth Wanted
Untitled posted a topic in Member-to-Member Fossil Trades
Hello, everyone! I am in search of Jurassic shark teeth. Primary species I am looking for is Agaleus dorsetensis, an Early Jurassic Galeomorph shark that has been found in Europe, most commonly at Lyme Regis, UK. I prefer teeth with no matrix, no repairs or restoration. Other Jurassic taxa I am looking for include: Palaeocarcharias stromeri Crassodontidanus Notidanoides Phorcynis catulina Palaeoscyllium formosum Corysodon cirinensis I can offer fossil shark teeth of different rarities, depending on which teeth of these you can offer. Some of the more desirable taxa can warrant teeth of high rarity in return. I have everything from deep-sea squaliform material, to many of the desirable Cretaceous lamniform species, and other scarce shark taxa. Please send me a PM if you have any of these teeth, and what species you may be looking for in return! Best Regards Ben
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