The identification of living crocodilians

Brazaitis, Peter

doi:10.5962/p.184719

Cited by 36 publications

(23 citation statements)

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“…no banhado de Campo Bom. Usou-se o nome da subespécie nominal por ter-se aceito C. latirostr' is chacoensisFreiberg & Carvalho, 1965. Brazaitis (1973, em sua revisão dos crocodilianos, não indica o Estado do Rio Grande do Sul na área de distribuição da figura 12, o que deve ser um lapso, pois a subespécie nominal é muito comum em certas áreas do Estado do Rio Grande do Sul, principalmente no lado or~ental entre a Lagoa dos Patos e a Serra do Sudoeste, bem como no banhado grande da Estação Ecológica do Taim e no Uruguai.…”

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Fauna reptiliana do norte da grande Porto Alegre, Rio Grande do Sul, Brasil

1983

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This paper reports the preliminary results of two years of herpetogeographic studies in the region called «Grande Porto Alegre» at its northern portion. The physiognomy shows, at North, slopes of the Brazilian Southern Plateau, more or less forested in a general view; these elevations graãuálly decrease to the South until the levei of the sea to Atlantic littoral by the eastern border, and to Rio Grande do Sul savanah, which extends to Uruguay and Argentina. The biota is transitional from the highland prairies and forests of the plateau to lowland prairies of the pampas. Three faunistic Provinces are included: Guarani, Pampean, and Tupi. The most conspicuous dispersion is shown by the taxa proceeding from the plateau to savanah (Dispersion Centre Guarani); the pampean species occur in low percentage (Dispersion Centre Uruguay), and an inappreciable account of Tupi fauna (Dispersion Centre of «Serra do Mar»). The new records are: presence of Chironius pyrrhopogon, Hydrodynastes gigas, Bothrops neuwiedi para-naensis, Micrurus corallinus; intergradation zone of Guarani and Pampean geographic roces; and new taxa of snakes, which will be described brieflly. The systematic composition presents: Chelonia, 4 (3 Chelidae, 1 Testudinidae); Sauria, 10 (1 Gekkonidae, 2 Iguanidae, 1 Anguidae, 3 Teiidae, 3 Amphisbaenidae); Serpentes, 45 (35 Colubridae, 4 Elapidae, 6 Viperidae); Crocodylia (1 Crocodylidae)

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Fauna reptiliana do norte da grande Porto Alegre, Rio Grande do Sul, Brasil

1983

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“…TL was measured to the nearest 1 cm for each individual (Table 1). The sex of each specimen was determined through probing of the cloaca manually (Brazaitis, 1968). The animals' axial regions, spanning from the sacral through proximal caudal regions, were removed and placed in covered pits, where they were partially buried in sand.…”

Section: Methodsmentioning

confidence: 99%

Androgynous rex – The utility of chevrons for determining the sex of crocodilians and non-avian dinosaurs

Erickson

Lappin

Larson

2005

Zoology

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“…C. latirostris is a medium‐sized crocodile, with adult individuals that reach an average size of between 1.5 and 2.5 m in total length. Although females do not usually exceed 1.7–1.8 m, males can reach 2.3 m, and as much as 3.1 m in total length (Brazaitis, 1973; Coutinho et al, 2013; Micucci & Waller, 1995; Siroski et al, 2020; Verdade et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Ontogenetic and interelemental study of appendicular bones of Caiman latirostris Daudin, 1802 sheds light on osteohistological variability in crocodylians

Pereyra,

Bona,

Siroski

et al. 2024

Journal of Morphology

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The osteohistology of vertebrates provides a reliable source to deduce biological information, particularly regarding growth and development. Although osteohistological studies in Neosuchia (Crocodyliformes, Mesoeucrocodylia) are relatively numerous, the number of species studied within the group is still small. Extant crocodilians are known to exhibit intraspecific variability linked to environmental conditions, habitat, feeding, and other intrapopulation factors. Here, we analyzed the osteohistology of the living South American Caiman latirostris throughout posthatching ontogeny. The histology of several appendicular bones of 13 different‐sized captive and wild individuals were examined. Although some thin sections revealed the classic lamellar, parallel‐fibered, or woven bone matrices, others showed a variation and a mix between the organization of the bone tissue. These histological differences are likely related to variability in the growth dynamics of caimans. In some bones of the juveniles studied, remnants of embryonic bone were observed. Osteohistological variation related to prevailing environmental conditions is documented. Furthermore, our results show ontogenetic variation in the type of bone tissues deposited throughout the development of C. latirostris. This study offers a broad framework for life history interpretations for C. latirostris and provides insight into the evolutionary history and ontogenetic growth of extinct crocodylian lineages.

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The identification of living crocodilians

Cited by 36 publications

References 0 publications

Fauna reptiliana do norte da grande Porto Alegre, Rio Grande do Sul, Brasil

Fauna reptiliana do norte da grande Porto Alegre, Rio Grande do Sul, Brasil

Androgynous rex – The utility of chevrons for determining the sex of crocodilians and non-avian dinosaurs

Ontogenetic and interelemental study of appendicular bones of Caiman latirostris Daudin, 1802 sheds light on osteohistological variability in crocodylians

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