Redescriptions of Birgeria acuminata (Agassiz, 1835) and Saurichthys sp. (Actinopterygii) fossils from the British Rhaetian, and redundancy of the genus Severnichthys Storrs, 1994

The latest Triassic Rhaetian Westbury Formation of the Penarth Group in Britain, with several highly fossiliferous bone beds, has been of interest to vertebrate researchers for two centuries. The b...

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Jeanerpeton mazonensis, gen. et sp. nov.: a new, exceptionally preserved, late Carboniferous amphibamiform from the Mazon Creek Lagerstätte, Illinois

The Mazon Creek fossil assemblage has provided the earliest fossil records of several important early tetrapod lineages, including the oldest dissorophoid temnospondyl, Amphibamus grandiceps. Recen...

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A new taxon of hybodontiform (Chondrichthyes, Elasmobranchii, Hybodontiformes) from the Late Triassic of Arizona, U.S.A., and its biostratigraphic importance within the Chinle Formation

Elasmobranchs are excellent candidates for biostratigraphy, with distinctive dentitions and wide distributions over a long period of time. However, the high variation in tooth shapes present within...

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New genera and species of lungfish (Sarcopterygii, Dipnoi) from the Upper Jurassic of western Gondwana, in the Jatobá basin, northeastern Brazil

The present study describes three new species and two new genera of lungfish from the Upper Jurassic (Tithonian) of the Aliança Formation (Jatobá Basin), in the state of Pernambuco, northeastern Br...

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Craniomandibular osteology of Dinodontosaurus isiyavamanda sp. nov. (Therapsida: Anomodontia) from the Manda Beds of Tanzania and new support for a younger age for the alleged oldest dinosaurs

Fossils from the Manda Beds of Tanzania have greatly informed on the diversity and evolution of Triassic tetrapods, including on what might be the oldest dinosaurs. Here, a new dicynodont taxon fro...

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Intercontinental evidence of the iconic genus Diplodocus Marsh, 1878 (Dinosauria, Sauropoda)

The sauropod Diplodocus is one of the most iconic dinosaurs, with fossils traditionally known from the Morrison Formation (U.S.A.; Kimmeridgian–Tithonian). Here, we describe a new diplodocid specim...

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A large tridactyl trackway from the Upper Cretaceous Hell Creek Formation of North Dakota, likely attributable to an adult Tyrannosaurus rex

Large theropod tracks are uncommon within the Hell Creek Formation with trackways being exceedingly rare. Until recently the tracks and trackways that have been associated with non-Tyrannosaurus ty...

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A new species of Urmiatherium (Bovidae, Mammalia) from the Late Miocene of China and its implications for cranial evolution in ovibovin-like bovids

Late Miocene ovibovin-like bovids are characterized by specialized cranial morphology associated with reinforced cranio-cervical articulations. Among them, Urmiatherium is one of the most derived g...

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Postcranial osteology of the giant oviraptorosaur Gigantoraptor erlianensis

Gigantoraptor erlianensis is an unexpectedly large-bodied oviraptorosaurian dinosaur from the Late Cretaceous of Inner Mongolia, China. Exhibiting a bizarre body plan, G. erlianensis is key to reve...

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New pectoral fin material from the Late Devonian of Ellesmere Island, Nunavut, Canada and diversity of the radius in finned tetrapodomorphs

The paired fins of stem tetrapods (tetrapodomorphs) have been studied extensively to understand both the phylogenetic framework of early tetrapods and the functional context of the fin-to-limb tran...

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New alligatorid, Mandrasuchus milleri, from the Early Paleocene (Danian) of the Denver Basin supports earliest Paleocene North American alligatorid radiation

The North American eusuchian fossil record through the Cretaceous–Paleogene (K–Pg) mass extinction shows a remarkable increase in diversity across the K–Pg boundary through the early Eocene. This i...

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Third species of Eusthenodon (Tetrapodomorpha, Tristichopteridae) from the Upper Devonian (Famennian) Catskill Formation of Pennsylvania, U.S.A., and an inventory of additional tristichopterid fossils...

We describe a new species of tristichopterid from a roadcut exposure of the Upper Devonian (Famennian) Catskill Formation at the Cogan House Exit Ramp locality in Lycoming County, Pennsylvania, U.S...

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A new species of Miophyseter (Cetacea, Odontoceti, Physeteroidea) from the Miocene of Japan

Three fossil physeteroids have been recovered from the Lower to Middle Miocene of Japan. Here, we describe and diagnose these specimens as a new species of the genus Miophyseter, M. gunmaensis, sp....

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A new articulated forelimb of Hamipterus tianshanensis from the Lower Cretaceous of Xinjiang, China

Hamipterus tianshanensis, a major component of the Early Cretaceous Hami Pterosaur fauna in northwestern China, is represented by numerous three-dimensionally preserved bones, eggs, and embryos. Al...

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A new deep bodied ray-finned fish (Osteichthyes/Actinopterygii) from the Permian Pedra do Fogo Formation (Northeastern Brazil) and its phylogenetic and paleogeographic affinities

A deep bodied ray-finned fish is reported from Cisuralian lacustrine deposits of the Parnaíba Basin. Its ecological niche and systematic affinities are discussed, considering the paleogeographic di...

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A new Late Devonian dipnoan from the Ketleri Formation of Latvia

Dipnoans (lungfishes) reached their peak of taxonomic diversity and morphological disparity during the Devonian Period, followed by a pronounced decline in both thereafter. The Late Devonian (Famen...

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Re-evaluating the Plagne (Tithonian) theropod trackway: quantitative analyses provide evidence on the presence of Megalosauripus transjuranicus in the French Jura

The Upper Jurassic (Oxfordian–Tithonian) carbonate platforms of the Jura region (France and Switzerland) are key to understanding dinosaur ichnology. This record is notable for both the abundance a...

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New large species of Cryptoprocta (Carnivora, Eupleridae) and new specimens of C. Spelea from the Holocene of Tsimanampesotse National Park, southwest Madagascar

Among the extant endemic carnivorans of Madagascar (family Eupleridae), the largest species is the fosa, Cryptoprocta ferox. A larger species, Cryptoprocta spelea, survived into the Late Holocene. ...

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Computed tomography datasets and 3D models of California Quaternary tar seep faunas for education and research

The Rancho La Brea and McKittrick asphalt seeps of California have produced exceptionally rich Cenozoic fossil assemblages, preserving late Pleistocene to Holocene fauna from distinct environmental...

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A new extinct Pleistocene species of spadefoot toad and comments on the paleoecology and paleobiogeography of anurans from Rancho La Brea, California

Fossil amphibians hold great promise for paleoecological, paleoclimatological, and biogeographic studies because of their extreme sensitivity to environmental conditions. However, the study of foss...

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Early Paleocene (earliest Torrejonian) mammals from the Tullock Member of the Fort Union Formation, northeastern Montana, U.S.A.

The Hell Creek Formation and overlying Tullock Member of the Fort Union Formation in northeastern Montana are well known for preserving an exceptional fossil record of mammals leading up to and acr...

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First observed cranial pathology in the early Permian synapsid Dimetrodon limbatus

Dimetrodon is an early non-mammalian synapsid from the early Permian of Europe and North America best known for its elongated neural spines, which in life formed an interconnected sail, and an earl...

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A revision of Nematheriinae sloths (Mammalia, Xenarthra, Scelidotheriidae) from the Early–Middle Miocene Santa Cruz Formation, southern Patagonia

Geological and paleontological surveys in the Santa Cruz Formation (SCF; Early–Middle Miocene; Southern Argentine Patagonia), begun in the 19th century, have uncovered a rich extinct fauna that has...

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New insights into the extinction and recovery of marine vertebrates across the Permian–Triassic mass extinction event in the Dolomites, Southern Alps, Italy

The impact of the Permian–Triassic mass extinction on marine vertebrates is incompletely understood due to their scarce fossil record. To better understand marine vertebrate extinction and recovery...

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Comparative osteology and adaptations of the extinct spectacled cormorant (Urile perspicillatus)

The spectacled cormorant (Urile perspicillatus) is a recently extinct species of Phalacrocoracidae that survived into historical times only on the Commander Islands in the Northern Pacific. The spe...

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A new diminutive Jurassic neosauropod from the Kaladongar Formation (Khadir Uplift) of the Kachchh Basin, western India

In this study, we report a partial skeleton of a small (ca. 7 m) sauropod dinosaur from the ?upper Lower Jurassic (Pliensbachian) to Bajocian strata of the Kaladongar Formation (Khadir Uplift), Kac...

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Re-evaluating body size in the Middle Jurassic pliosaur Liopleurodon ferox Sauvage, 1873

Liopleurodon ferox is a macropredatory pliosaurid plesiosaur from the Callovian (Middle Jurassic) of Europe. Several near-complete skeletons are known from the Peterborough Member of the Oxford Cla...

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A new species of Enchodus from the Western Interior Seaway of North America and a taxonomic revision of Enchodus dirus, Leidy, 1857

Enchodus is a diverse and widespread genus of teleost fish known from the Late Cretaceous. Many North American species of Enchodus were erected based on isolated remains, including Enchodus dirus L...

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A case of mistaken identity: a reassessment of puma (Puma concolor) and the North American cheetah-like cat (Miracinonyx trumani) occurrences in the fossil record of Upper Pleistocene North America

The North American cheetah-like cat (Miracinonyx trumani) is a Late Pleistocene felid currently known from a handful of sites in North America. Its close relative, the mountain lion (Puma concolor)...

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