Results 51 to 60 of about 833 (186)

On the Structure of the Plesiosauria Skull [PDF]

open access: yesQuarterly Journal of the Geological Society of London, 1896
The structure of the skull of the Liassic Plesiosauria has been discussed by many writers, but the various accounts that have been given of it are incomplete, and often differ one from the other in important particulars, doubtless owing to the fact that in most cases the specimens examined are much crushed, and are embedded in the matrix ...
openaire   +1 more source

Youngest occurrences of rhomaleosaurid plesiosaurs indicate survival of an archaic marine reptile clade at high palaeolatitudes [PDF]

open access: yesActa Palaeontologica Polonica, 2015
Rhomaleosaurid plesiosaurians were a common and ecologically significant component of Early Jurassic marine faunas, primarily as large-bodied predators. They declined in abundance and made their last fossil appearance in the Middle Jurassic. However, the
Roger B.J. Benson   +2 more
doaj   +1 more source

Cranial anatomy and taxonomy of Dolichorhynchops bonneri new combination, a polycotylid (Sauropterygia: Plesiosauria) from the Pierre Shale of Wyoming and South Dakota [PDF]

open access: yes, 2008
The taxonomic identity of two well-preserved polycotylid plesiosaur skeletons from the Pierre Shale of far northern Wyoming and southern South Dakota has been controversial since their discovery.
O’Keefe, F. Robin
core   +3 more sources

Kimmeridgian pliosaurids (Sauropterygia, Plesiosauria) from Tlaxiaco, Oaxaca, southern Mexico

open access: yesRevista Mexicana de Ciencias Geológicas, 2018
Fossil remains of two specimens of the family Pliosauridae are described in the present manuscript. These fossils are from the Kimmeridgian shallow marine strata belonging to the informally known Sabinal formation deposited in the Tlaxiaco Basin, which ...
Jair Israel Barrientos-Lara   +2 more
doaj   +1 more source

New freshwater plesiosaurian materials from the Middle Jurassic Xintiangou Formation of the Sichuan Basin, southwestern China

open access: yesJournal of Palaeogeography, 2020
Sichuan Basin is very famous for the Mesozoic reptiles, especially the Jurassic dinosaurs. Here, we report some isolated plesiosaurian teeth and vertebrae newly excavated from the Middle Jurassic Xintiangou Formation in Yunyang county, Chongqing City ...
Feng Zhang   +5 more
doaj   +1 more source

On the cranial anatomy of the polycotylid plesiosaurs, including new material of Polycotylus latipinnis, Cope, from Alabama [PDF]

open access: yes, 2004
The cranial anatomy of plesiosaurs in the family Polycotylidae (Reptilia: Sauropterygia) has received renewed attention recently because various skull characters are thought to indicate plesiosauroid, rather than pliosauroid, affinities for this family ...
O’Keefe, F. Robin
core   +2 more sources

Skeletal completeness of the non‐avian theropod dinosaur fossil record

open access: yesPalaeontology, Volume 62, Issue 6, Page 951-981, November 2019., 2019
Abstract Non‐avian theropods were a highly successful clade of bipedal, predominantly carnivorous, dinosaurs. Their diversity and macroevolutionary patterns have been the subject of many studies. Changes in fossil specimen completeness through time and space can bias our understanding of macroevolution.
Daniel D. Cashmore   +2 more
wiley   +1 more source

Evidence of pachyostosis in the cryptocleidoid plesiosaur Tatenectes laramiensis from the Sundance Formation of Wyoming [PDF]

open access: yes, 2010
In this paper we present evidence for pachyostosis in the cryptocleidoid plesiosaur Tatenectes laramiensis Knight, 1900 (O\u27Keefe and Wahl, 2003a).
O’Keefe, F. Robin, Street, Hallie P.
core   +2 more sources

Reassessment of 'Plesiosaurus' megacephalus (Sauropterygia: Plesiosauria) from the Triassic-Jurassic boundary, UK [PDF]

open access: yesPalaeontologia Electronica, 2015
Smith, AS (2015): Reassessment of 'Plesiosaurus' megacephalus (Sauropterygia: Plesiosauria) from the Triassic-Jurassic boundary, UK.
openaire   +2 more sources

Redécouverte des « crocodiles fossiles des environs du Mans » de Georges Cuvier après deux siècles d’oubli [PDF]

open access: yesBSGF - Earth Sciences Bulletin, 2016
En 1808 puis en 1824, Georges Cuvier signala dans la région du Mans la présence de restes de crocodiles fossiles à partir desquels fut créée l’espèce Crocodilus maunyi GRAY, 1831.
Brignon Arnaud
doaj   +1 more source

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