Results 1 to 10 of about 256 (122)

New Mitogenomic Resources for the Caiman yacare (Daudin, 1802) From Bolivia [PDF]

Ecology and Evolution
This study addresses the evolutionary state of a newly discovered population of Caiman yacare outside the western edge of its range in Bolivia by providing new mitochondrial genomic resources.
Guido Miranda, Ninón Ríos, Nicolas Hubert   +2 more
doaj   +3 more sources

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

PeerJ, 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, Guillermo Hernán Cassini, Paula Bona   +2 more
doaj   +3 more sources

Unexpected morphological variability in the eggshells of the South American caimans Caiman latirostris and Caiman yacare [PDF]

Scientific Reports, 2023
Eggshell morphology is a valuable indicator of the local conditions within the nests of modern crocodilians and birds. In contrast to these latter, the anatomical structure of the eggshells of most crocodilian species is practically unknown.
E. Martín Hechenleitner, María V. Fernandez Blanco, Segundo R. Núñez-Campero, Lucas E. Fiorelli, Paula Bona   +4 more
doaj   +2 more sources

Roars, Rumbles, and Resonance: A Systematic Review and Meta-Analysis of Crocodylian Acoustic Signals. [PDF]

Ecol Evol
Crocodylians are highly vocal reptiles, possessing a complex acoustic signalling system including vocal and non‐vocal signals used for courtship, mating, mediating conflict, and providing maternal care. Despite this, research on crocodylian acoustic signalling remains infrequent, with methodologies and terminology varying widely across studies.
Flores SA, Dwyer RG, Parsons S, Potvin DA.   +3 more
europepmc   +2 more sources

Size, not phylogeny, explains the morphology of the endosseous labyrinth in the crown clade Crocodylia. [PDF]

J Anat
Here, we present the most complete dataset to date on the endosseous labyrinths of extant crocodylians. Using 3D geometric morphometrics, we show that allometry constitutes a major contributor of the shape variation of the crocodylian endosseous labyrinths and that the development of this structure is likely linked to the braincase conformation, in all
Pochat-Cottilloux Y, Perrichon G, Hautier L, Rinder N, Amiot R, Raselli I, Adrien J, Lachambre J, Fernandez V, Martin JE.   +9 more
europepmc   +2 more sources

Low temperatures reduce skin healing in the Jacaré do Pantanal (Caiman yacare, Daudin 1802) [PDF]

Biology Open, 2013
Summary Studies of skin wound healing in crocodilians are necessary given the frequent occurrence of cannibalism in intensive farming systems. Air temperature affects tissue recovery because crocodilians are ectothermic.
Leandro Nogueira Pressinotti, Ricardo Moraes Borges, Angela Paula Alves De Lima, Victor Manuel Aleixo, Renata Stecca Iunes, João Carlos Shimada Borges, Bruno Cogliati, José Roberto Machado Cunha Da Silva   +7 more
doaj   +2 more sources

Clustering crocodylian dental morphology: Insights into functional adaptations, diet, and ontogeny. [PDF]

J Anat
Extant crocodylians may be divided into five clusters based on the residuals of four linear dental measurements (y‐axes) and their variation along the jaw (x‐axes). These clusters correlate to snout shape, prey preference, and feeding ecology, particularly prey size and the degree of processing necessary. Multiple families and subfamilies were found in
Testin JJ, D'Amore DC.
europepmc   +2 more sources

Evolution of growth strategy in alligators and caimans informed by osteohistology of the late Eocene early-diverging alligatoroid crocodylian Diplocynodon hantoniensis. [PDF]

J Anat
Living alligatoroids (alligators and caimans) share osteohistological features and display similar overall growth rates. However, it is unclear if these shared patterns are the result of convergent responses or reflect an ancestral condition. In this study, we histologically sampled nine femora of the fossil alligatoroid Diplocynodon hantoniensis to ...
Hoffman DK, Goldsmith ER, Houssaye A, Maidment SCR, Felice RN, Mannion PD.   +5 more
europepmc   +2 more sources

Trifold origin of the reptilian ear ossicle and its relation to the evolutionary modification of the temporal skull region. [PDF]

J Anat
The columella‐complex in reptile middle ears involves the footplate, columella shaft, and extracolumella. The latter is partly of quadrate developmental origin, whereas the footplate derives from the mesodermal otic capsule, the shaft and another part of the extracolumella from the hyoid arch.
Werneburg I, Bronzati M.
europepmc   +2 more sources

Analyzing the Life History of Caimans: The Growth Dynamics of Caiman latirostris From an Osteohistological Approach. [PDF]

J Morphol
This research offers insights into the life history and growth dynamics of Caiman latirostris, highlighting their growth patterns, aging, and attainment of sexual maturity, and how environmental conditions impact their development. This study has direct implications for understanding the life histories of extinct archosaurs and other sauropsids ...
Pereyra ME, Bona P, Siroski P, Chinsamy A.   +3 more
europepmc   +2 more sources