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A stem batrachian from the Early Permian of Texas and the origin of frogs and salamanders
TLDR
The discovery of an amphibamid temnospondyl from the Early Permian of Texas that bridges the gap between other Palaeozoic amphibians and the earliest known salientians and caudatans from the Mesozoic is reported.
IRRITATOR CHALLENGERI, A SPINOSAURID (DINOSAURIA: THEROPODA) FROM THE LOWER CRETACEOUS OF BRAZIL
Abstract The holotype of Irritator challengeri Martill et al., 1996 from the Romualdo Member of the Santana Formation (Lower Cretaceous) in northeastern Brazil represents the most complete skull of a
Owenetta kitchingorum, sp. nov., a small parareptile (Procolophonia: Owenettidae) from the Lower Triassic of South Africa
TLDR
The anatomy of a new species of Owenetta, O. kitchingorum, from the Early Triassic is described here on the basis of three nearly complete skeletons, and controversies surrounding parareptilian phylogeny are discussed as they relate to Owenetta.
Embryos of an Early Jurassic Prosauropod Dinosaur and Their Evolutionary Significance
TLDR
Embryonic body proportions and an absence of well-developed teeth suggest that hatchlings of this dinosaur may have required parental care and suggests that the quadrupedal gait of giant sauropods may have evolved by retardation of postnatal negative allometry of the forelimbs.
The cranial anatomy and relationships of Secodontosaurus, an unusual mammal-like reptile (Synapsida: Sphenacodontidae) from the early Permian of Texas
The cranial anatomy of the Early Permian sphenacodontid synapsid Secodontosaurus is redescribed. There is no evidence for recognition of more than one species of Secodontosaurus, and S. willistoni is
The anatomy and relationships of the Lower Permian reptile Araeoscelis
TLDR
A combination of primitive and derived characters shared by Araeooscelis and Petrolacosaurus justifies their inclusion in the suborder Araeoscelidia as members of separate families and indicates that they represent the earliest, most primitive known stage in the adaptive radiation of the diapsid reptiles.
A NEW CROCODYLOMORPH ARCHOSAUR FROM THE UPPER TRIASSIC OF NORTH CAROLINA
Abstract A new taxon of sphenosuchian crocodylomorph, Dromicosuchus grallator, is described on the basis of a well-preserved, largely articulated partial skeleton from Late Triassic strata in the
CRANIAL OSTEOLOGY OF HYPSOGNATHUS FENNERI, A LATEST TRIASSIC PROCOLOPHONID REPTILE FROM THE NEWARK SUPERGROUP OF EASTERN NORTH AMERICA
Abstract Based primarily on two previously undescribed skulls, this paper presents a detailed description of the skull and mandible of the latest Triassic procolophonid reptile Hypsognathus fenneri
The cranial anatomy and relationships of the synapsid Varanosaurus (Eupelycosauria: Ophiacodontidae) from the Early Permian of Texas and Oklahoma
The cranial anatomy of the Early Permian synapsid Varanosaurus is restudied on the basis of preYiously described specimens from Texas, most importantly the holotype of the type species V.
Early Permian bipedal reptile.
TLDR
A 290-million-year-old reptilian skeleton from the Lower Permian of Germany provides evidence of abilities for cursorial bipedal locomotion, employing a parasagittal digitigrade posture, and confirms the widespread distribution of Bolosauridae across Laurasia during this early stage of amniote evolution.
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