Results 11 to 20 of about 665 (187)

Correction: A New Archosauriform (Reptilia: Diapsida) from the Manda Beds (Middle Triassic) of Southwestern Tanzania [PDF]

open access: yesPLoS ONE, 2014
Correction: A New Archosauriform (Reptilia: Diapsida) from the Manda Beds (Middle Triassic) of Southwestern ...
PLOS ONE (2189197)
doaj   +5 more sources

Rapid neck elongation in Sauropterygia (Reptilia: Diapsida) revealed by a new basal pachypleurosaur from the Lower Triassic of China [PDF]

open access: yesBMC Ecology and Evolution, 2023
Neck elongation has appeared independently in several tetrapod groups, including giraffes and sauropod dinosaurs on land, birds and pterosaurs in the air, and sauropterygians (plesiosaurs and relatives) in the oceans.
Qi-Ling Liu   +6 more
doaj   +2 more sources

The evolution of muscle spindles. [PDF]

open access: yesExp Physiol
Abstract Muscle spindles are stretch‐sensitive mechanoreceptors found in the skeletal muscles of most four‐limbed vertebrates. They are unique amongst sensory receptors in the ability to regulate their sensitivity by contraction of the intrafusal muscle fibres on which the sensory endings lie.
Banks RW, Proske U.
europepmc   +2 more sources

An injured pachypleurosaur (Diapsida: Sauropterygia) from the Middle Triassic Luoping Biota indicating predation pressure in the Mesozoic [PDF]

open access: yesScientific Reports, 2021
The Middle Triassic Luoping Biota in south-west China represents the inception of modern marine ecosystems, with abundant and diverse arthropods, fishes and marine reptiles, indicating recovery from the Permian–Triassic mass extinction.
Qiling Liu   +7 more
doaj   +2 more sources

New insights into pterosaur cranial anatomy: X-ray imaging reveals palatal structure and evolutionary trends [PDF]

open access: yesCommunications Biology
Among the least studied portion of the pterosaur skeleton is the palate, which tends to be poorly preserved and commonly only visible from one side (the ventral portion).
He Chen   +3 more
doaj   +2 more sources

The oldest record of Saurosphargiformes (Diapsida) from South China could fill an ecological gap in the Early Triassic biotic recovery [PDF]

open access: yesPeerJ, 2022
Diversification following the end-Permian mass extinction marks the initiation of Mesozoic reptile dominance and of modern marine ecosystems, yet major clades are best known from the Middle Triassic suggesting delayed recovery, while Early Triassic ...
Long Cheng   +6 more
doaj   +3 more sources

The pseudosuchian record in paleohistology: A small review. [PDF]

open access: yesAnat Rec (Hoboken)
Abstract Archosauria originated around the Earth's largest biotic crisis that severely affected all ecosystems globally, the Permotriassic Mass extinction event, and comprises two crown‐group lineages: the bird‐lineage and the crocodylian lineage. The bird lineage includes the iconic pterosaurs, as well as dinosaurs and birds, whereas the crocodylian ...
Scheyer TM.
europepmc   +2 more sources

Almost billfish: convergent longirostry, micro-dentition, and possible glandular sinuses in a large teleost fish from the Upper Cretaceous of Northern Italy. [PDF]

open access: yesJ Anat
A fossil rostrum fragment of a large teleost fish from the Upper Cretaceous of Northern Italy reveals remarkable anatomical convergences with Cenozoic and Recent billfishes (marlins, swordfishes, and akin). The extinct group Plethodidae independently acquired a long snout, micro‐teeth, and oil‐gland sinuses well before the evolution of true billfishes.
Serafini G   +5 more
europepmc   +2 more sources

Pseudosuchian thermometabolism: A review of the past two decades. [PDF]

open access: yesAnat Rec (Hoboken)
Abstract Pseudosuchia, one of the two main clades of Archosauria, is today only represented by some 20 extant species, the crocodilians, representing only a fraction of its extinct diversity. Extant crocodilians are ectotherms but present morphological and anatomical features usually associated with endothermy.
Faure-Brac MG.
europepmc   +2 more sources

Molecular anatomy of emerging Xenopus left-right organizer at successive developmental stages. [PDF]

open access: yesDev Dyn
Abstract Background Vertebrate left–right symmetry breaking is preceded by formation of left–right organizer. In Amphibian, this structure is formed by gastrocoel roof plate, which emerges from superficial suprablastoporal cells. GRP is subdivided into medial area, which generates leftward flow by rotating monocilia and lateral Nodal1 expressing areas,
Petri N   +3 more
europepmc   +2 more sources

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