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Showing results for tags 'middle triassic'.
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Barracudasauroides panxianensis (Jiang, Schmitz, Hao & Sun) 2006
oilshale posted a gallery image in Member Collections
From the album: Vertebrates
Barracudasauroides panxianensis (Jiang, Schmitz, Hao & Sun) 2006 Middle Triassic Luoping Yunnan PRC Alternative name: Mixosaurus panxianensis Jiang, Schmitz, Hao & Sun, 2006.-
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From the album: Vertebrates
Kyphosichthys grandei Xu & Wu, 2012 Middle Triassic Pelsonian Luoping Yunnan PCR-
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From the album: My collection in progress
Ceratites laevigatus Philippi 1901 Location: Héming, Grand East, France Age: 242 - 237 Mya (Ladinian, Middle Triassic) Measurements: 11,4 cm (diameter) Kingdom: Animalia Phylum: Mollusca Subphylum: Conchifera Class: Cephalopoda Subclass: Ammonoidea Order: Ceratitida Family: Ceratitidae Are visible the peculiar smooth living chamber and the ceratitic suture pattern. -
Bicknell, R.D.C., Smith, P.M. 2021 The First Fossil Scorpion from Australia. Alcheringa (ahead-of-print publication) PDF LINK
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Early June, two years ago, I found this ichthyopterygian vertebra in a small nodule out of the northern French Middle Triassic, from the Upper Muschelkalk. Almost two years to the day later a friend of mine helped me complete its preparation this month. When done, one of the first things that struck me were the elongate, and slightly tilted rib attachment sites. As far as I know, such rib attachment sites do not occur in any parvipelvian ichthyosaur species, which, instead, have round, button-like, attachment sites, especially on dorsal vertebrae as my find is. Now I realise that ichthyosaur vertebrae typically hold very little diagnostic value, but I was wondering whether the peculiar rib attachments might be indicative of a super-family, family or even genus, so that I can label the vertebra more informatively than "indet. basal ichthyopterygia". Nothing is known of the species at the sites where I found this, though, based on size alone, Cymbospondylus sp. seems like a good candidate. Any other ideas? @Pemphix @sander @paulgdls @Welsh Wizard @Crazyhen Dimensions of the specimen: 41mm (diameter) x 21 (depth)
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A new paper is available online: Kammerer, Christian F.; Nesbitt, Sterling J.; Flynn, John J.; Ranivoharimanana, Lovasoa; Wyss, André R., 2020. A tiny ornithodiran archosaur from the Triassic of Madagascar and the role of miniaturization in dinosaur and pterosaur ancestry. Proceedings of the National Academy of Sciences doi:10.1073/pnas.1916631117. ISSN 0027-8424. Until now, the fossil record of Triassic diapsids from Madagascar was pretty poor, and after the putative 'prosauropod' from the Isalo II unit (later named Azendohsaurus madagaskarensis) was found to be a non-archosauriform archosauromorph (like the Azendohsaurus type species), avemetatarsalians remained absent from the published Isalo II diapsid fossil record, but Kongonaphon, along with an unnamed silesaurid and an unnamed basal avemetatarsalian (reported at the SVP 2019 meeting), demonstrates that early bird-line archosaurs were widespread in Gondwana during the Anisian-Ladinian.
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New specimen of Triassurus and the early evolution of salamanders
DD1991 posted a topic in Fossil News
A new exciting paper regarding early lissamphibian evolution is available online: Rainer R. Schoch; Ralf Werneburg; Sebastian Voigt (2020). A Triassic stem-salamander from Kyrgyzstan and the origin of salamanders. Proceedings of the National Academy of Sciences of the United States of America 117. doi:10.1073/pnas.2001424117. https://www.pnas.org/content/early/2020/05/05/2001424117 For a long time, a bonafide salamander from the Triassic remained elusive in the fossil record, although the recent description of Chinlestegophis has helped shed light on early caecilian evolution. Triassurus had been assigned to Caudata by Ivakhnenko (1978), but Estes (1981) questioned this placement and viewed it as a larval temnospondyl, while Milner (1994, 2000) noted that Triassurus has a suite of traits that distinguish it from Jurassic salamanders. Now, however, the paper by Schoch et al. confirms the initial placement of Triassurus as a member of Caudata, effectively making that genus the earliest bonafide salamander and filling another gap in the fossil record of early lissamphibians. Additionally, the new specimen of Triassurus happens to further confirm the temnospondyl origin of lissamphibians by sharing physical features with branchiosaurids and amphibamiforms.-
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From the album: MY FOSSIL Collection - Dpaul7
Keichousaurus Fossil Guizhou Xingyi China Middle Triassic (~210 million years ago) Keichousaurus is a genus of marine reptile in the pachypleurosaur family which went extinct at the close of the Triassic in the Triassic-Jurassic extinction event. The name derives from Kweichow (now Guizhou Province) in China where the first fossil specimen was discovered in 1957. They are among the most common sauropterygian fossils recovered and are often found as nearly complete, articulated skeletons, making them popular among collectors. Keichousaurus, and the pachypleurosaur family broadly, are sometimes classified within Nothosauroidea, but are otherwise listed as a separate, more primitive lineage within Sauropterygia. Keichousaurus, like all sauropterygians, was highly adapted to the aquatic environment. Individuals of this genus ranged up to 2.7 m in length, and had both long necks and long tails, with elongated, five-toed feet. The pointed head and sharp teeth in this genus also indicate that they were fish-eaters. Some recovered specimens feature an especially developed ulna suggesting they may have spent some time on land or in marshes. In addition fossil evidence suggest also a pair of fossilized pregnant marine reptiles called Keichousaurus hui, show they had a mobile pelvis to give birth to live young rather than laying eggs. Kingdom: Animalia Phylum: Chordata Class: Reptilia Superorder: †Sauropterygia Order: †Nothosauroidea Family: †Keichousauridae Genus: †Keichousaurus- 4 comments
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From the album: MY FOSSIL Collection - Dpaul7
Keichousaurus Fossil Guizhou Xingyi China Middle Triassic (~210 million years ago) Keichousaurus is a genus of marine reptile in the pachypleurosaur family which went extinct at the close of the Triassic in the Triassic-Jurassic extinction event. The name derives from Kweichow (now Guizhou Province) in China where the first fossil specimen was discovered in 1957. They are among the most common sauropterygian fossils recovered and are often found as nearly complete, articulated skeletons, making them popular among collectors. Keichousaurus, and the pachypleurosaur family broadly, are sometimes classified within Nothosauroidea, but are otherwise listed as a separate, more primitive lineage within Sauropterygia. Keichousaurus, like all sauropterygians, was highly adapted to the aquatic environment. Individuals of this genus ranged up to 2.7 m in length, and had both long necks and long tails, with elongated, five-toed feet. The pointed head and sharp teeth in this genus also indicate that they were fish-eaters. Some recovered specimens feature an especially developed ulna suggesting they may have spent some time on land or in marshes. In addition fossil evidence suggest also a pair of fossilized pregnant marine reptiles called Keichousaurus hui, show they had a mobile pelvis to give birth to live young rather than laying eggs. Kingdom: Animalia Phylum: Chordata Class: Reptilia Superorder: †Sauropterygia Order: †Nothosauroidea Family: †Keichousauridae Genus: †Keichousaurus-
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