Results 41 to 50 of about 665 (187)

Revisiting the choristodere and stem-lepidosaur specimens of the Guimarota Beds (Kimmeridgian, Portugal): taxonomic implications [PDF]

Acta Palaeontologica Polonica
The Guimarota beds (Kimmeridgian, Portugal) constitute one of the richest microvertebrate assemblages for the Upper Jurassic, which include a diverse fauna of small reptiles.
ALEXANDRE R.D. GUILLAUME, EDUARDO PUÉRTOLAS-PASCUAL, MIGUEL MORENO-AZANZA   +2 more
doaj   +1 more source

Morphology of the temporal skull region in tetrapods: research history, functional explanations, and a new comprehensive classification scheme

Biological Reviews, Volume 96, Issue 5, Page 2229-2257, October 2021., 2021
ABSTRACT The morphology of the temporal region in the tetrapod skull traditionally has been a widely discussed feature of vertebrate anatomy. The evolution of different temporal openings in Amniota (mammals, birds, and reptiles), Lissamphibia (frogs, salamanders, and caecilians), and several extinct tetrapod groups has sparked debates on the ...
Pascal Abel, Ingmar Werneburg
wiley   +1 more source

A new rhynchocephalian from the late jurassic of Germany with a dentition that is unique amongst tetrapods. [PDF]

, 2012
Rhynchocephalians, the sister group of squamates (lizards and snakes), are only represented by the single genus Sphenodon today. This taxon is often considered to represent a very conservative lineage.
Adriana López-Arbarello (123259), Heyng, Alexander M., Heyng Alexander M., Hecker, Andreas, Rauhut, Oliver W. M., Alexander M. Heyng (123257), Andreas Hecker (123262), Oliver W. M. Rauhut, Oliver W M Rauhut, Alexander M Heyng, Oliver W. M. Rauhut (123254), Rauhut Oliver W. M., López-Arbarello Adriana, Hecker Andreas, Andreas Hecker, Alexander M. Heyng, López-Arbarello, Adriana, Adriana López-Arbarello   +17 more
core   +1 more source

Tanystropheid archosauromorphs in the Lower Triassic of Gondwana [PDF]

Acta Palaeontologica Polonica, 2018
Tanystropheidae is a clade of early archosauromorphs with a reported distribution ranging from the Early to the Late Triassic of Asia, Europe, and North America.
Tiane Macedo De Oliveira, Daniel Oliveira, Cesar L. Schultz, Leonardo Kerber, Felipe L. Pinheiro   +4 more
doaj   +1 more source

Description and etiology of paleopathological lesions in the type specimen of Parasaurolophus walkeri (Dinosauria: Hadrosauridae), with proposed reconstructions of the nuchal ligament

Journal of Anatomy, Volume 238, Issue 5, Page 1055-1069, May 2021., 2021
The fossilized lesions in Parasaurolophus walkeri comprise periodontal disease, fractured ribs, and myositis ossificans traumatica in a number of vertebral dorsal spines and in the ilium. The injuries appear to have been caused by one or more non‐threatening events. The discoidal overgrowth on the dorsal spines m ight represent a pathological correlate
Filippo Bertozzo, Fabio Manucci, Matthew Dempsey, Darren H. Tanke, David C. Evans, Alastair Ruffell, Eileen Murphy   +6 more
wiley   +1 more source

First records of diapsid Palacrodon from the Norian, Late Triassic Chinle Formation of Arizona, and their biogeographic implications [PDF]

Acta Palaeontologica Polonica, 2018
Vertebrates from the Triassic Period have broadly disparate tooth shapes and dentition patterns, the result of intense morphospace experimentation following the Permo-Triassic extinction.
Ben T. Kligman, Adam D. Marsh, William G. Parker   +2 more
doaj   +1 more source

FIRST SKELETAL REMAINS OF HELVETICOSAURUS FROM THE MIDDLE TRIASSIC ITALIAN OUTCROPS OF THE SOUTHERN ALPS, WITH REMARKS ON AN ISOLATED TOOTH

Rivista Italiana di Paleontologia e Stratigrafia, 2022
The enigmatic marine reptile Helveticosaurus zollingeri, from the Middle Triassic Besano Formation of Monte San Giorgio, is known from three specimens found in Swiss territory. This paper describes the first skeletal remains of this taxon recovered from
Gabriele Bindellini, CRISTIANO DAL SASSO
doaj   +1 more source

Rhynchocephalians (Diapsida: Lepidosauria) from the Jurassic Kota Formation of India [PDF]

Zoological Journal of the Linnean Society, 2001
Despite their rarity today, rhynchocephalians formed a diverse Early Mesozoic clade with a comparatively good fossil record. They had a Pangaean distribution in the Late Triassic and Early Jurassic, although the Gondwanan record remains more limited than the Laurasian one. We report here on new sphenodontian material from the Jurassic Kota Formation of
S. E. EVANS, G. V. R. PRASAD, B. K. MANHAS   +2 more
openaire   +2 more sources

Dimorfismo sexual en la proporción entre el segundo y cuarto digito (2D/4D) de Gonatodes albogularis (Gekkonidae) en Colombia

Papéis Avulsos de Zoologia, 2011
La proporción entre el segundo y cuarto dígito (2D/4D) ha sido bien estudiada como un dimorfismo sexual que puede resultar de los efectos androgénicos prenatales sobre la expresión de los genes homeobox.
Mauricio Peñuela
doaj   +1 more source

Osteohistology of hyperodapedontine rhynchosaurs from the Upper Triassic of Southern Brazil [PDF]

Acta Palaeontologica Polonica, 2015
The first osteohistological study focused exclusively on rhynchosaurs (non-archosauriform archosauromorphs), based on the hyperodapedontines Teyumbaita sulcognathus and Hyperodapedon sp., from the Upper Triassic of Southern Brazil, indicates a relatively
Fábio Hiratsuka Veiga, Marina Bento Soares, Juliana Manso Sayão   +2 more
doaj   +1 more source