Results 21 to 30 of about 28,920 (202)

‘Ear stones’ in crocodylians: a cross-species comparative and ontogenetic survey of otolith structures

open access: yesRoyal Society Open Science, 2022
The vestibular system of the inner ear is a crucial sensory organ, involved in the sensation of balance and equilibrium. It consists of three semicircular canals that sense angular rotations of the head and the vestibule that detects linear acceleration ...
Julia A. Schwab   +7 more
doaj   +1 more source

Controlled feeding experiments with juvenile alligators reveal microscopic dental wear texture patterns associated with hard-object feeding

open access: yesFrontiers in Ecology and Evolution, 2022
Dental wear analyses are classically applied to mammals because they have evolved heterodont dentitions for sophisticated mastication. Recently, several studies have shown a correlation between pre-assigned and analytically inferred diet preferences in ...
Daniela E. Winkler   +8 more
doaj   +1 more source

Re-evaluation of the morphology and phylogeny of Diplocynodon levantinicum Huene & Nikoloff, 1963 and the stratigraphic age of the West Maritsa coal field (Upper Thrace Basin, Bulgaria) [PDF]

open access: yesPeerJ, 2022
Diplocynodon levantinicum Huene & Nikoloff, 1963 was described based on few bone fragments from the West-Maritsa lignite basin of Central Bulgaria.
Tobias Massonne, Madelaine Böhme
doaj   +2 more sources

An expanded combined evidence approach to the Gavialis problem using geometric morphometric data from crocodylian braincases and Eustachian systems. [PDF]

open access: yesPLoS ONE, 2014
The phylogenetic position of the Indian gharial (Gavialis gangeticus) is disputed--morphological characters place Gavialis as the sister to all other extant crocodylians, whereas molecular and combined analyses find Gavialis and the false gharial ...
Maria Eugenia Leone Gold   +2 more
doaj   +1 more source

A three-dimensional geometric morphometric analysis of the morphological transformation of Caiman lower jaw during post-hatching ontogeny [PDF]

open access: yesPeerJ, 2023
Shape ontogenetic changes of the lower jaw in crocodylians are poorly understood. In order to answer some questions related to the inter- and intraspecific morphological variation of the mandible of two extant Caiman species, we performed a three ...
María Victoria Fernandez Blanco   +2 more
doaj   +2 more sources

Selection and trans-species polymorphism of major histocompatibility complex class II genes in the order Crocodylia. [PDF]

open access: yesPLoS ONE, 2014
Major Histocompatibility Complex (MHC) class II genes encode for molecules that aid in the presentation of antigens to helper T cells. MHC characterisation within and between major vertebrate taxa has shed light on the evolutionary mechanisms shaping the
Weerachai Jaratlerdsiri   +4 more
doaj   +1 more source

Allodaposuchus palustris sp. nov. from the upper cretaceous of Fumanya (South-Eastern Pyrenees, Iberian Peninsula): systematics, palaeoecology and palaeobiogeography of the enigmatic allodaposuchian crocodylians. [PDF]

open access: yesPLoS ONE, 2014
The controversial European genus Allodaposuchus is currently composed of two species (A. precedens, A. subjuniperus) and it has been traditionally considered a basal eusuchian clade of crocodylomorphs. In the present work, the new species A. palustris is
Alejandro Blanco   +4 more
doaj   +1 more source

The evolution and role of the hyposphene-hypantrum articulation in Archosauria: phylogeny, size and/or mechanics? [PDF]

open access: yesRoyal Society Open Science, 2019
Living members of Archosauria, the reptile clade containing Crocodylia and Aves, have a wide range of skeletal morphologies, ecologies and body size.
Candice M. Stefanic   +1 more
doaj   +1 more source

Role of Chromosome Changes in Evolution and Diversity [PDF]

open access: yesGenomics & Informatics, 2015
The karyotypes of most species of crocodilians were studied using conventional and molecular cytogenetics. These provided an important contribution of chromosomal rearrangements for the evolutionary processes of Crocodylia and Sauropsida (birds and ...
Kornsorn Srikulnath   +2 more
doaj   +1 more source

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