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Showing results for tags 'Triassic'.
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Taxonomy from Fossilworks.org. Etymology: From Luoping County (Yunnan Province, South China), where the new fossiliferous site yielding these specimens is located; dedicated to Lev Semenovich Berg (1876—1950), a famous geographer and biologist, member of the Academy of Sciences of the USSR, for his great contributions to the study of fossil fishes. Diagnosis for the genus from Sun et al. 2009, p. 462: “Fusiform to deep fusiform polzbergid. Preopercular sickle-shaped, with a short infraorbital process, a vertically oriented dorsal region and an expanded, anteriorly curved, ventral one. Premaxillary, extending antero-dorsally to the maxillary for at least 2/3 of its length; thin procumbent anterior teeth. No field of modified scales at the base of anal fin. Caudal fin with four or five epaxial rays." Diagnosis for the species from Sun et al. 2009, p. 462: "Medium-sized Luopingichthys, with a fusiform body. Six teeth borne by premaxillary, three or four by maxillary and six by dentary. Coronoid(s) present; skull bones heavily ornamented with tubercles, short ridges and small patches of ganoine randomly arranged. Ornamentation on scales reduced to faint longitudinal ridges giving rise to a posterior serration; mid-dorsal ridge scales well differentiated. Stout fringing fulcra on dorsal and anal fins. Caudal fin with rudimentary lepidotrichia and four or five epaxial rays." Drawing of the skull from Sun et al. 2009 (scale bar equals 5mm): References: Z. Sun, A. Tintori, D. Jiang, C. Lombardo, M. Rusconi, W. Hao, and Y. Sun. 2009. A New Perleidiform (Actinopterygii, Osteichthyes) from the Middle Anisian (Middle Triassic) of Yunnan, South China. Acta Geologica Sinica 83(3):460-470.
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Ichthyosaur Origin Might Predate Permian-Triassic Extinction Event
Oxytropidoceras posted a topic in Fossil News
Oldest 'fish-lizard' fossils ever found suggests these sea monsters survived the 'Great Dying' By Harry Baker, LIveScience, March 18, 2023 The fossilized remains of an ichthyosaur dating back to shortly after the Permian mass extinction suggest that the ancient sea monsters emerged before the catastrophic event Oldest sea reptile from Age of Dinosaurs found on Arctic island Uppsla University, March 13, 2023 The paper is: Kear, B.P., Engelschiøn, V.S., Hammer, Ø., Roberts, A.J. & Hurum, J.H., 2023: Earliest Triassic ichthyosaur fossils push back oceanic reptile origins. Current Biology 33(5), R1-R2 Yours, Paul H.-
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I've been bothered for quite some time about determining the age of petrified wood. The area I collect from has wood with no growth rings indicating a climate with little to no change during the year. At the same time, I find other pieces in the same area With many growth rings indicating seasonal weather changes. This area is the in shinarump portion of the triassic. So, what I am thinking, wood grew in the shinarump, was covered by volcanic eruptions (chinle) and petrified. The Volcanics (chinle) eroded away and more trees grew later on the exposed shinarump and in turn, were petrified by more volcanic eruptions. These volcanics have now eroded away exposing wood with and without growth rings. Sound plausible? Note; The San Francisco peaks near Flagstaff have been erupting off and on for the last 6 million years and could be covering the whole SW from time to time. If this theory holds up, this might mean the petrified wood in Petrified National park might not be triassic age? And if not, how would you determine the correct age? Another random thought-- The wood I find is all in the shinarump which is below the chinle. The wood in Petrified Nat Park seems to be lying on top of the chinle indicating it probably grew on a formation above the chinle. I say this because the chinle in this area (southern Utah) doesn't support any plant life. Think of the painted desert! No forest there! Another thought--- there are stumps in situ here on the shinarump! Thoughts?
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Some finds from the Triassic basin of Durham, NC. Not sure if they're anything, but thought I'd bring them home, just in case. Would love to hear what you guys think they are
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What was the largest Theropod Dinosaur of the Triassic period
Joseph Fossil posted a topic in Questions & Answers
The Triassic period (252-201 Million Years ago), the era when the first dinosaurs evolved, isn't exactly known for large dinosaurs (except for the first large sauropods from the Latest Triassic). The largest terrestrial creatures at the time were a few dicynodonts such as Lisowicia and other archosaurs like the rauisuchidae (like Postasuchus). Only a few known large theropod dinosaurs from the Triassic are currently known including Gojirasaurus (Coelophysoid - New Mexico US, Western North America) (Late Triassic (210-201.3 Million Years ago)), growing up to 5.5 meters (18 feet) in length. But it may have competition. For one example, There is a Herrerasaurus specimen (PVSJ 53) that apparently grew up to 6 meters (20 feet) in length. There is also an unnamed Herrerasaurid (UFSM 11330) from the Santa Maria Formation (Late Triassic (233.23 Million Years ago)) from the southern most state of Brazil. Image credit: https://www.researchgate.net/publication/349926161_Taxonomic_and_phylogenetic_reassessment_of_a_large-bodied_dinosaur_from_the_earliest_dinosaur-bearing_beds_Carnian_Upper_Triassic_from_southern_Brazil Maurício S. Garcia, Rodrigo T. Müller, Flávio A. Pretto, Átila A. S. Da-Rosa & Sérgio Dias-Da-Silva (2021) Taxonomic and phylogenetic reassessment of a large-bodied dinosaur from the earliest dinosaur-bearing beds (Carnian, Upper Triassic) from southern Brazil, Journal of Systematic Palaeontology, 19:1, 1-37, DOI: 10.1080/14772019.2021.1873433 https://www.researchgate.net/publication/349926161_Taxonomic_and_phylogenetic_reassessment_of_a_large-bodied_dinosaur_from_the_earliest_dinosaur-bearing_beds_Carnian_Upper_Triassic_from_southern_Brazil Recently described only in 2021, the Herrerasaurid apperently reached lengths between 4.5-5 meters (14-16 feet) in length. I truly believe this species could grow up to 5.5 meters (18 feet). There is probably more other theropod dinosaur species from the Triassic, but I do think these two species could be good contenders for being the Largest Theropod Dinosaurs from the Triassic period. What do you guys think?
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Hello, I just bought a nice Keich at Tucson for a good deal, but I am curious, how much is composited or restored? If it is completely fake I will be taking it back as I have the contact information of the dealer. I know surely part of it is painted, which I don't mind for display purposes and I was happy with the price, but I am hoping at least the majority is real. I put an alcohol wipe over part of it and some paint came off on the left arm beside the white stripe, but throughout the center there was no paint. They told me there were a few repairs, but I am hoping that is all that it is... Teeth and left arm are the areas I am suspect of. On the back, there are two raised slabs that they said were to keep the cracks together.
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I received these very strange Triassic nodules from Madagascar,an opinion about the ID? Half nodule,i think it's not a fish skin on it,Pehaps a claw?
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Is there anything odd about this Saurichthys?
quam_fossilium posted a topic in Is It Real? How to Recognize Fossil Fabrications
Is this correctly identified as a Saurichthys? Does it at all seem augmented/modified? Anyone have an idea of the typical value of a fossil like this (without using the sold price as a reference)? -
I collected a number of these as a kid some 50 years ago. Only one is like this. I just thought I should try and identify it. I had always assumed it was a small tree trunk. Seems to match pictures of a calamite trunks (a new thing to me) with the distinctive ties at regular intervals. It comes from the old mining town of Brownhills UK. Coal, sand and clay were mined there. This came from the edges of an open pit clay mine. I went back to the site a few years ago but it's reclaimed now. You could still dig small holes and find fragments. So my kids found some. You just needed a bucket of water to wash the rocks off to see if they had anything because of the clay. This piece has a diameter of 4".
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I find skulls one of the most interesting pieces of fossil you can ever own. So here I'd love to see all of your fossil skulls, or parts of one. Here is my Pleistocene era skull of a Ursus arctos. An ice age brown bear. Very very uncommon find.
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On Friday I made a visit to an Atlanta area gem/mineral/fossil show. Generally I have poor luck at these shows, in large part because there are only a couple of dealers with fossils. This trip was different. One of the dealers was selling some items from an old collection. Most of what I bought was exciting to me because they are species I have wanted for a long time, for one reason or another. First up is a nice (to me at least) New Jersey Tiassic coelocanth, Diplurus newarki (I think the genus might have changed but Diplurus is OK for now). The dealer thought it was just a skull so it was very cheap, as the rock is very black and it was hard to see the skeleton in the room lighting. I used the flashlight on my phone to give oblique light and was very happy at what I saw! He also had some ammonites I was excited to see. Two are Triassic, a Ceratites nodosus and an Acanthoceratites spinosum from Germany. I collected a Ceratites when I was a kid (about 10) living in Germany, but it broke and all I have left is a piece. I've wanted a better specimen for roughly the last 50 years! I started to clean out the inner whorls on the Acanthoceratites but that will take quite a while. There was a third ammonite that was labeled as another Triassic species, but when I got home I recognized that it is actually a Placenticeras, a Late Cretaceous genus. I am not sure of the species and the preservation is different from the North American sites I know about, so I suspect it might be from a European source. I'll post more photos in the Fossil ID thread to see if anyone recognizes it. I also scored a trilobite I've wanted forever, an Elliposocephalus hoffi. Not because it is especially pretty, but because it is representative of the Chechosolakian Cambrian that is so important in trilobite lore. I also grabbed a nice Calymene celebra. Last up for now is an OK shrimp from Lebanon. The body is all authentic, but I'm not 100% sure about the appendages. It's pretty nice though so I like it. There are a few other little things but the above is enough for now. When I got home a box of New Mexico ammonites from the Christmas auction was waiting for me, which made a good day even better! Don
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From the album: Fossildude's Late Triassic Lockatong Formation Fossils
Scales of an actinopterygian or paleoniscoid fish. Late Triassic Lockatong Formation Newark Supergroup North Bergen, NJ.© © 2015 Tim Jones
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Triassic Tooth from Redonda Formation, labelled as possibly Postosuchus
DarasFossils posted a topic in Fossil ID
Hello, I bought this tooth from a popular fossil selling website where it was labelled as 'Postosuchus?' but the description says it is from the Redonda Formation which has not had a Postosuchus formally described from it. I'm aware there a few other species from this formation that are also pseudosuchians and could have a similar type of tooth, which I do not mind if it is one of them. Although, I absolutely love Postosuchus as a creature and I hoping that is what it is, though I know it's definitely unlikely. From my research, I assume it's Redondasaurus but this particular site has several other teeth from this formation specifically labelled as Redondasaurus so I assume there is a reason why they labelled this one and a few others differently. I've seen small teeth like this labelled as Coelophysis but I know that's extremely unlikely because it's not recurved but if it was that would be super cool! I don't have the greatest lighting equipment in my house to take pictures of it, but I can provide some shotty ones if that would be helpful! The tooth is 0.74 inches long, so quite small. The picture below is from the website I bought it from and it shows the detail much better than a photo I could take. Please don't be afraid to disappoint me! I just want to know what this tooth is!
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Yesterday I set out to a site that exposed the Gettysburg formation up in Maryland in hopes of finding some Triassic footprints. What I came back with was mostly some trace fossils and burrows, but some of these looked suspiciously like tracks, so I wanted to post them on ID and see if someone with a little more experience could help me out. I’ll also probably send some emails out in hopes of getting someone who’s more experienced with the Triassic formations around PA and Maryland. Anyways here are the potential trackways I really hope to get some light shed on these and learn more about this era around Maryland because I’ve been doing a lot of research on these. Some really cool burrows: I collected the Triassic burrows in case my potential footprints turned out to be duds so that I wouldn’t come back completely empty handed. These are really cool I’ve come to believe that the small holes are where bugs or Beatles must have lived inside them. Someone with a little more expertise could chime in though. Now here’s the potential trackways. As always, these are some of my favorite fossils to collect so I REALLY want them to be trackways. But if they turn out not to be, then I will keep searching. I’ve got more leads further away in Pennsylvania but it’d just be nice to find them in Maryland where they’re so few and far between to find up there. These look fairly suspicious so I’ll see what y’all think of these. This one looks like a small theropod print, the way the traces are done. potential trackway circled. This one is also suspicious. There’s no discernible trackway to spot here, as this could just be geologic and be an inclusion in the rock, however, it could very well also be a trackway. Whether these are dinosaur trackways, or just fossil blobs that are getting me excited, I can’t help but be in awe at this site. Anytime I go to any potential trackway site, I just imagine all the small dinosaurs, early mammals, and large amphibians dominating this once river plain, leaving behind their footprints in the mud to be found. Were they running towards some unsuspecting prey item? Were they running away from something? Or just having a leisurely stroll during this time period? I don’t know what fascinates me so much about trackways but I always feel they have a story to tell about them.
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What caused the decline of the Eugeneodontids - (Buzz saw sharks)
Joseph Fossil posted a topic in Questions & Answers
I've been fascinated with the Eugeneodontids (the buzz-saw chondrichthyans) and how they managed to practically become the apex predators of most oceanic environments from the Carboniferous to the Permian with famous members like Edestus and Helicoprion. Two genus of this extraordinary group even survived the Permian-Triassic Extinction 252 Million Years ago - Fadenia and Caseodus! http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=34456 http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=34451 But by the Olenekian stage of the Triassic, the group disappeared. I can understand why the more specialized members of the group like Helicoprion went extinct (ecological specialists and top predators don't do well in events like the Permian-Traissic Extinction event), but what caused the extinction of Fadenia and Caseodus? What occurred in the Triassic that ended the reign of the Eugeneodontids? -
Loc: https://www.geopark-thueringen.de/entdecken-erleben/nationale-geotope/standard-titel Age: Triassic, Keuper For wchich Archosaur, this tooth belongs? I know that it's hard to say, but maybe somebody can do this
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I went on a recent fossil hunt in North Carolina looking for the cow branch formation. I found some fossils. It was a very quick stop, about an hour before I had to leave. I found what I believe is to be a footprint it reminds me of a tremnospondyl but it’s from the cow branch I believe. I also found some shells there, plant material, and pieces of what looked to be good footprint material but I wasn’t there long enough to fully examine. So here’s the finds from yesterday: Total haul: footprint in question: outline of footprint: What species was this footprint from? It’s late Triassic and I’m pretty happy to be finding footprints again these might be my new favorite fossils.
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From the album: Triassic
Revueltosaurus was a Pseudosuchian, on the branch of the Archosaurs more closely related to the Crocodilians than the Dinosaurs. Despite the serrated teeth, it is thought to have been herbivorous.-
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From the album: Triassic
Lungfish are an ancient group of fish, with swim bladders that evolution co-opted as a kind of "lung," allowing them to breathe air. This may have proven invaluable in a seasonally dry climate in Pangea.-
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From the album: Triassic
From the "dawn" of the Dinosaurs, this small tooth represents an early theropod. Unlike the other serrated archosauriform teeth present in the formation, this tooth is ziphodont - thin and labio-lingually compresed - the archetypical tooth form that most theropods adhered to since their beginnings.-
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I've found this vertebra in a Middle Triassic marine formation in the middle east. it's 29mm long. a friend of mine suggested that it's a reptilian vertebra but I want to know more. I'll appreciate any help you can offer.
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Is the fossil site at Union Wash worth going to? I've read that the site's been depleted of fossils. Is that true?
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Scottish fossil revealed to be pterodactyl ancestor BBC News, October 6, 2022 Elgin Reptiles - Wikipedia Clark, N.D.L. (2008) The Elgin Marvels. Deposits, 13 . pp. 36-39. ISSN 1744-9588 Yours, Paul H.
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I visted Aust Cliff on the River Severn, Gloucestershire UK back in Feburary and managed to find a large block of the 'Rhaetic Bone Bed' . Lots of bone fragments, fish teeth, even a shark fin spine! But my best finds are a paddle bone and large tooth. (Still got plenty more rock pieces to break open and search for more, so a long term project...) However i would like to I.D this Ichthyosaur in particular. Does anyone know about the early ichthyosaurs from the late Triassic? Age: 208 - 201mya (Late Triassic: Rhaetian) - Aust Cliff Paddle bone - humerus? Tooth (broken off tip sadly):
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Hello, I've had a bit of difficulty getting a possibility of what this bone could have come from. It seems far too large to be from Pachystropheus rhaeticus so could Plesiosaur or Ichthyosaur be a possibility? The bone is broken off around the back. There's quite a lot of other things aside from the bone, which I think some of include a small tooth from Birgeria acuminatus as well as one from Lissodus minimus and a scale which looks like those of Gyrolepis albertii. Thank you
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