Results 31 to 40 of about 5,415 (214)

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

The velar chord and dynamic integration of the gular valve in crocodylians. [PDF]

Anat Rec (Hoboken)
Crocodilians have a unique gular valve that forms a seal between the oral cavity and the pharynx. The gular valve has traditionally been treated as two parts: a mobile ventral flap associated with the tongue and a fixed dorsal velum palatini. This work describes a connective tissue band, the velar chord, which functionally integrates the two parts of ...
Young BA, Cramberg M, Young OG.
europepmc   +2 more sources

Winter survivorship of hatchling broad-snouted caimans (Caiman latirostris) in Argentina

Ethnobiology and Conservation, 2022
The first life stage of crocodilians is considered the most critical in terms of survival, particularly in regions that have well-defined cold seasons. To estimate this parameter for hatchling broad-snouted caimans, Class I (CI = snout-vent length < 25 cm), we released 36 caimans (18 in 2018, and 18 in 2019) born in captivity that were equipped ...
Evangelina V. Viotto, Melina S. Simoncini, Luciano M. Verdade, Joaquín L. Navarro, Carlos I. Piña   +4 more
semanticscholar   +3 more sources

Tear meniscometry test in wild animals [PDF]

Ciência Rural, 2019
: This study aimed to describe strip meniscometry test values for Amazona aestiva (turquoise-fronted amazon), Ara ararauna (blue-and-yellow macaw) and Caiman latirostris (broad-snouted caiman).
Arianne Pontes Oriá, Ana Cláudia Santos Raposo, Vinícius José da Silva Cardoso de Brito, Nayone Lima Lantyer Cordeiro de Araújo, Maria Madalena Souza Oliveira, Isaac Manoel Barros Albuquerque   +5 more
doaj   +1 more source

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

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

First record of predation on Rhinella diptycha (Anura, Bufonidae) by Caiman latirostris (Crocodylia, Alligatoridae)

Actualidades Biológicas, 2020
Caimans of the species Caiman latirostris, which are widely distributed in South America, are opportunistic predators. They show ontogenetic variation in diet, with young individuals initially feeding on invertebrates and then gradually adding ...
Rodney Murillo Peixoto-Couto, Maiara Cabrera-Miguel, Zaida Ortega   +2 more
doaj   +1 more source

Widespread latitudinal asymmetry in the performance of marginal populations: A meta‐analysis

Global Ecology and Biogeography, Volume 32, Issue 6, Page 842-854, June 2023., 2023
Abstract Aim Range shifts are expected to occur when populations at one range margin perform better than those at the other margin, yet no global trend in population performances at range margins has been demonstrated empirically across a wide range of taxa and biomes.
Fernando Pulido, Bastien Castagneyrol, Francisco Rodríguez‐Sánchez, Yónatan Cáceres, Adara Pardo, Eva Moracho, Johannes Kollmann, Fernando Valladares, Johan Ehrlén, Alistair S. Jump, Jens‐Christian Svenning, Arndt Hampe   +11 more
wiley   +1 more source

Distribution of populations of broad-snouted caiman (Caiman latirostris, Daudin 1802, Alligatoridae) in the São Francisco River basin, Brazil Distribuição das populações de jacaré-do-papo-amarelo (Caiman latirostris, Daudin 1802, Alligatoridae) na bacia do Rio São Francisco, Brasil

Brazilian Journal of Biology, 2010
We surveyed populations of the broad-snouted caiman, Caiman latirostris, throughout the São Francisco River basin, from Três Marias reservoir, State of Minas Gerais, to the river delta, at the boarder of Sergipe and Alagoas states.
R. Filogonio, VB. Assis, LF. Passos, ME. Coutinho   +3 more
doaj   +1 more source

Disruption of the developmental programming of the gonad of the broad snouted caiman (Caiman latirostris) after in ovo exposure to atrazine

Environmental science and pollution research international, 2023
Environmental exposure to agrochemicals during early stages of development can induce subtle alterations that could permanently affect normal physiology. Previously, we reported that in ovo exposure to atrazine (ATZ) disrupts testicular histoarchitecture
G. Canesini, G. Galoppo, Y. Tavalieri, G. P. Lazzarino, C. Stoker, E. H. Luque, J. G. Ramos, M. Muñoz-de-Toro   +7 more
semanticscholar   +1 more source