Results 21 to 30 of about 1,292 (190)

Correlation between Hox code and vertebral morphology in the mouse: towards a universal model for Synapsida [PDF]

open access: yesZoological Letters, 2017
Background The importance of the cervical vertebrae as part of the skull–neck system in facilitating the success and diversity of tetrapods is clear. The reconstruction of its evolution, however, is problematic because of the variation in the number of ...
Christine Böhmer
doaj   +2 more sources

Endothiodon cf. bathystoma (Synapsida: Dicynodontia) bony labyrinth anatomy, variation and body mass estimates.

open access: yesPLoS ONE, 2018
The semicircular canal (SC) system of the inner ear detects head angular accelerations and is essential for navigation and spatial awareness in vertebrates.
Ricardo Araújo   +7 more
doaj   +6 more sources

Synapsids and sensitivity: Broad survey of tetrapod trigeminal canal morphology supports an evolutionary trend of increasing facial tactile specialization in the mammal lineage. [PDF]

open access: yesAnat Rec (Hoboken)
Abstract The trigeminus nerve (cranial nerve V) is a large and significant conduit of sensory information from the face to the brain, with its three branches extending over the head to innervate a wide variety of integumentary sensory receptors, primarily tactile.
Miyamae JA   +4 more
europepmc   +2 more sources

Complementary approaches to tooth wear analysis in Tritylodontidae (Synapsida, Mammaliamorpha) reveal a generalist diet.

open access: yesPLoS ONE, 2019
Stereoscopic microwear and 3D surface texture analyses on the cheek teeth of ten Upper Triassic to Lower Cretaceous tritylodontid (Mammaliamorpha) taxa of small/medium to large body size suggest that all were generalist feeders and none was a dietary ...
Daniela C Kalthoff   +5 more
doaj   +7 more sources

Possible eucynodont (Synapsida: Cynodontia) tracks from a lacustrine facies in the Lower Jurassic Moenave Formation of southwestern Utah [PDF]

open access: yesPeerJ
Eight fossil tetrapod footprints from lake-shore deposits in the Lower Jurassic Moenave Formation at the St. George Dinosaur Discovery Site (SGDS) in southwestern Utah cannot be assigned to the prevalent dinosaurian (Anomoepus, Eubrontes, Gigandipus ...
Holly Hurtado   +2 more
doaj   +3 more sources

Bone histology of the graviportal dinocephalian therapsid Jonkeria from the middle Permian Tapinocephalus Assemblage Zone of the Karoo Basin of South Africa [PDF]

open access: yesActa Palaeontologica Polonica, 2021
Here we examine the bone histology of multiple skeletal elements of three individuals of Jonkeria from the middle Permian Tapinocephalus Assemblage Zone of the Karoo Basin of South Africa.
MOHD SHAFI BHAT   +2 more
doaj   +1 more source

Hypercanines: Not just for sabertooths. [PDF]

open access: yesAnat Rec (Hoboken)
Abstract Hypercanines are here defined as hypertrophied caniniform teeth, that is, canine teeth that are elongated to serve specific functions in different clades of mammals and their synapsid ancestors. This article presents an overview of the occurrence of hypercanines, their growth, and their function across a broad range of clades.
Werdelin L.
europepmc   +2 more sources

Pinopsin Regulates Melatonin Production and Daily Locomotor Activity: Functional Insights From Gene-Edited Xenopus Tadpoles. [PDF]

open access: yesJ Pineal Res
ABSTRACT Circadian rhythm alignment depends on environmental light detection via opsins. Pinopsin, originally identified in the pineal organ of birds and later in amphibian pineal complex and eyes, may play a role in this process, though its function has not been genetically tested.
Heshami N   +4 more
europepmc   +2 more sources

Whole-body endothermy: ancient, homologous and widespread among the ancestors of mammals, birds and crocodylians. [PDF]

open access: yesBiol Rev Camb Philos Soc, 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.
Grigg G   +5 more
europepmc   +2 more sources

Evolution and identity of synapsid carpal bones [PDF]

open access: yesActa Palaeontologica Polonica, 2020
To date there is little information on carpal bone homology in late Palaeozoic and Mesozoic Synapsida. Crucial to the understanding of homology in synapsid carpal elements is the fact that different nomenclatures are used for the carpals of non ...
Susanna Kümmell   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy