Results 31 to 40 of about 833 (186)
Peculiar macrophagous adaptations in a new Cretaceous pliosaurid [PDF]
Royal Society Open Science, 2015 During the Middle and Late Jurassic, pliosaurid plesiosaurs evolved gigantic body size and a series of craniodental adaptations that have been linked to the occupation of an apex predator niche. Cretaceous pliosaurids (i.e.
Valentin Fischer +5 more
doaj +1 more source
Energy Science &Engineering, Volume 11, Issue 8, Page 2725-2741, August 2023., 2023 We suggested a dual flapping hydrofoil turbine system that mimics the leg structure and swimming scheme of ancient marine dinosaurs or turtles. To design it, a numerical parametric study was carried out to determine the separation distance and phase difference between the front and rear hydrofoils. Through this study, the case of 70° pitch angle of (4c,
Dasom Jeong +2 more
wiley +1 more source
Deep‐time invention and hydrodynamic convergences through amniote flipper evolution
The Anatomical Record, Volume 306, Issue 6, Page 1323-1355, June 2023., 2023 Abstract The diapsid plesiosaurs were pelagic and inhabited the oceans from the Triassic to the Cretaceous. A key evolutionary character of plesiosaurs is the four wing‐like flippers. While it is mostly accepted that plesiosaurs were underwater fliers like marine turtles, penguins, and maybe whales, other swimming styles have been suggested in the past.
Anna Krahl, Ingmar Werneburg
wiley +1 more source
The oldest plesiosaur (Reptilia, Sauropterygia) from Antarctica [PDF]
Polar Research, 2011 Antarctic plesiosaurs are known from the Upper Cretaceous López de Bertodano and Snow Hill Island formations (Campanian to upper Maastrichtian), which crop out within the James Ross Basin region of the Antarctic Peninsula.
Alexander Wilhelm Armin Kellner +10 more
doaj +1 more source
Osteology of a perinatal aristonectine (Plesiosauria; Elasmosauridae) [PDF]
Antarctic Science, 2016 AbstractPerinatal specimens give valuable information about the first stages of vertebrate ontogeny. Here, the morphology and palaeohistology of an aristonectine perinatal specimen from Seymour Island (Isla Marambio), López de Bertodano Formation are analysed.
O'gorman, Jose Patricio +2 more
openaire +2 more sources
The locomotor ecomorphology of Mesozoic marine reptiles
Palaeontology, Volume 66, Issue 2, March/April 2023., 2023 Abstract The aftermath of the end‐Permian mass extinction provided ecological opportunities for many groups of reptiles, marking the beginning of reptile dominance of the Mesozoic oceans. Clades such as ichthyosaurs, thalattosuchians, sauropterygians, mosasaurs and turtles evolved a remarkable diversity of ecological niches and became important ...
Susana Gutarra +5 more
wiley +1 more source
Biological Reviews, Volume 97, Issue 2, Page 766-801, April 2022., 2022 ABSTRACT The whole‐body (tachymetabolic) endothermy seen in modern birds and mammals is long held to have evolved independently in each group, a reasonable assumption when it was believed that its earliest appearances in birds and mammals arose many millions of years apart.
Gordon Grigg +5 more
wiley +1 more source
ELASMOSÁURIDOS (PLESIOSAURIA) DEL CRETÁCICOTÁRDIO DEL NORTE DE PATAGONIA
Spanish Journal of Palaeontology, 2021 Se describe nuevo material de plesiosaurios del Cretácico Tardío del noroeste de Patagonia. Algunos caracteres (cresta lateral en las cervicales, y la barra pelvica) indican que corresponden a Elasmosauridae, un grupo de plesiosauroideos cuyos miembros derivados eran cosmopolitas en el Cretacico Tardío.
Zulma Nélida Gasparini +1 more
openaire +2 more sources
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
Foramina in plesiosaur cervical centra indicate a specialized vascular system [PDF]
Fossil Record, 2017 The sauropterygian clade Plesiosauria arose in the Late Triassic and survived to the very end of the Cretaceous. A long, flexible neck with over 35 cervicals (the highest number of cervicals in any tetrapod clade) is a synapomorphy of Pistosauroidea ...
T. Wintrich, M. Scaal, P. M. Sander
doaj +1 more source