Triassic

Just out | Ademosynidae (Insecta: Coleoptera): A new concept for a coleopteran key taxon and its phylogenetic affinities to the extant suborders @ Palaeontologia Electronica

Just out @ Palaeontologia Electronica Ademosynidae (Insecta: Coleoptera): A new concept for a coleopteran key taxon and its phylogenetic affinities to the extant suborders Author(s) Evgeny V. Yan, Rolf G. Beutel, and Alexander G. Ponomarenko Abstract: †Ademosynidae is a controversial extinct family of Coleoptera, first discovered in Australian Upper-Triassic deposits. The last known representative is known from the Early Jurassic of Kirghizstan. Type material from the collection of Moscow Paleontological Institute

Just out | Origin and relationships of the Ictidosauria to non-mammalian cynodonts and mammals @ Historical Biology

Just out @ Historical Biology Origin and relationships of the Ictidosauria to non-mammalian cynodonts and mammals Author(s) José F. Bonaparte & A. W. Crompton Abstract: Ictidosaurian genera are allocated to two families, Tritheledontidae and Therioherpetidae. This paper provides a diagnosis for Ictidosauria. The previously named family Brasilodontidae is shown to be a junior synonym of a family, Therioherpetidae. It is concluded that Ictidosauria originated from Late Permian procynosuchid non-mammalian cynodonts rather than from

Just out | Skull and postcranium of the bystrowianid Bystrowiella schumanni from the Middle Triassic of Germany, and the position of chroniosuchians within Tetrapoda @ Journal of Systematic Palaeontology

Just out @ Journal of Systematic Palaeontology Skull and postcranium of the bystrowianid Bystrowiella schumanni from the Middle Triassic of Germany, and the position of chroniosuchians within Tetrapoda Author(s) Florian Witzmann & Rainer R. Schoch Abstract: Chroniosuchians form a mainly terrestrial or semi-terrestrial clade of Permian and Triassic crocodile- or varanid-like tetrapods, usually considered stem amniotes, but with disputed affinities within that grade. Two groups can be distinguished, the chroniosuchids and bystrowianids. Whereas the chroniosuchid

Just out | Stem caecilian from the Triassic of Colorado sheds light on the origins of Lissamphibia @ PNAS

Just out @ PNAS Stem caecilian from the Triassic of Colorado sheds light on the origins of Lissamphibia Author(s) Jason D. Pardo, Bryan J. Small, and Adam K. Huttenlocker Abstract: The origin of the limbless caecilians remains a lasting question in vertebrate evolution. Molecular phylogenies and morphology support that caecilians are the sister taxon of batrachians (frogs and salamanders), from which they diverged no later than the early Permian. Although recent efforts have

Just out | Mercury evidence for pulsed volcanism during the end-Triassic mass extinction @ PNAS

Just out @ PNAS Mercury evidence for pulsed volcanism during the end-Triassic mass extinction Author(s) Lawrence M. E. Percival, Micha Ruhl, Stephen P. Hesselbo, Hugh C. Jenkyns, Tamsin A. Mather, and Jessica H. Whiteside Abstract: The Central Atlantic Magmatic Province (CAMP) has long been proposed as having a causal relationship with the end-Triassic extinction event (∼201.5 Ma). In North America and northern Africa, CAMP is preserved as multiple basaltic units interbedded with uppermost Triassic to

Just out | Facies stacking and extinctions across the Triassic–Jurassic boundary in a peritidal succession from western Sicily @ Facies

Just out @ Facies Facies stacking and extinctions across the Triassic–Jurassic boundary in a peritidal succession from western Sicily Author(s) S. Todaro, P. Di Stefano, G. Zarcone, V. Randazzo Abstract: An uppermost Triassic–lowermost Jurassic carbonate platform succession, which is 430 m thick, in northwestern Sicily is described with the aim to provide new data on the sedimentological and biological variations across the Triassic–Jurassic boundary in peritidal environments. The studied succession belonged to the rimmed carbonate shelf

Just out | New Triassic Asteroidea (Echinodermata) specimens and their evolutionary significance @ Rivista Italiana di Paleontologia e Stratigrafia

Just out @ Rivista Italiana di Paleontologia e Stratigrafia New Triassic Asteroidea (Echinodermata) specimens and their evolutionary significance Author(s) Daniel B. Blake, Andrea Tintori, Tea Kolar-Jurkovsek Abstract: The Paleozoic-Mesozoic transition saw the disappearance of asteroid stem groups and the ascent of the crown group, but late Paleozoic and Triassic asteroids are rare and transition events are poorly documented. Three new Middle and Late Triassic specimens augment existing data; included are

Just out | Testing hypotheses of element loss and instability in the apparatus composition of complex conodonts: articulated skeletons of Hindeodus @ Palaeontology

Just out @ Palaeontology Testing hypotheses of element loss and instability in the apparatus composition of complex conodonts: articulated skeletons of Hindeodus Author(s) Muhui Zhang, Haishui Jiang, Mark A. Purnell, Xulong Lai Abstract: Knowledge of the conodont skeleton, in terms of the morphology of the elements and the positions they occupy, provides the foundation for understanding of homology, taxonomy and evolutionary relationships in conodonts. This knowledge also underpins analyses of conodont

Just out | New archosauromorph fragments from the Dockum Group of Texas and assessment of the earliest dinosaurs in North America @ Historical Biology

Just out @ Historical Biology New archosauromorph fragments from the Dockum Group of Texas and assessment of the earliest dinosaurs in North America Author(s) Volkan Sarıgül Abstract: Three small and gracile jaw fragments are recovered from the Boren Quarry, one of the lowest fossil quarries of the Upper Triassic Dockum Group of Texas. The specimens are referred to archosauromorphs, where the morphology of the dentary and teeth of two specimens resemble

Just out | A new gomphodont cynodont (Traversodontidae) from the Middle–Late Triassic Dinodontosaurus Assemblage Zone of the Santa Maria Supersequence, Brazil @ Palaeontology

Just out @ Palaeontology A new gomphodont cynodont (Traversodontidae) from the Middle–Late Triassic Dinodontosaurus Assemblage Zone of the Santa Maria Supersequence, Brazil Author(s) Tomaz P. Melo, Agustín G. Martinelli, Marina B. Soares Abstract: The tetrapod faunas from the terrestrial Middle–Late Triassic basins of Africa and South America are among the richest in the world, especially in non-mammalian cynodonts. Despite the great abundance of cynodont specimens found in these basins, there are few