Light microscopic and immunohistochemical study of the trachea of the broad-snouted caiman (Caiman latirostris)

Santos, Clarice Machado dos; Figueiredo, Marcelo Abidú; Teixeira, Monalisa Jales; Nascimento, Aparecida Alves do; Sales, Armando

doi:10.17221/1568-vetmed

Cited by 2 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, Santos et al. () studied adult specimens of C. latirostris and detected the same pattern as here. Supporting this idea, Di Pietro et al.…”

Section: Discussionsupporting

confidence: 84%

See 1 more Smart Citation

Development of the chondrocranium of two caiman species, Caiman latirostris and Caiman yacare

Blanco

2019

Journal of Anatomy

View full text Add to dashboard Cite

Little is known about the embryonic development and variation of the chondrocranium in Crocodylia and there are no works on any Caiman species. Due to the importance of cranial features in the systematics of this clade, investigating the development of the skull in embryonic stages is essential. In this study, we present for the first time the development of the cartilaginous skull of two extant Caiman species. Anatomical descriptions of the embryonic chondrocranium of Caiman latirostris and Caiman yacare were made, paying special attention to their inter‐ and intraspecific variation. For this purpose, pre‐hatching ontogenetic cranial series of these two caiman species were prepared with a double staining and diaphanization technique. The main differences with other crocodylian species were observed in the palatoquadrate, and interspecific variation within the genus was recorded in the hyobranchial apparatus and larynx. Some characters may be distinctive of Caiman (posterior and ventral surface of the otic process of the palatoquadrate articulated with the dorsal process of the columella auris, and otic process articulated with the lateral wall of the auditory capsule), Alligatoridae (presence of an epiphanial foramen) or C. latirostris and C. yacare (Corpus hyoidei with different number and position of foramina and different shapes of its anterior contour and anterior and posterior notch, different degrees of broadening of the distal end of the Cornu branchiale I, and presence/absence of a notch in the posteroventral surface of the cricoid). Homologies of the elements belonging to the hyobranchial apparatus could not be confirmed. As in other tetrapods the trachea consists of incomplete cartilaginous rings. Morphological changes and dissimilarities found in this study are useful as a context to start studying phylogenetic constraints. Moreover, in a heterochronic context, variations may be involved.

show abstract

“…Moreover, Santos et al. () studied adult specimens of C. latirostris and detected the same pattern as here. Supporting this idea, Di Pietro et al.…”

Section: Discussionsupporting

confidence: 84%

“…Santos et al. () say that in some species of reptiles the trachea consists of incomplete cartilaginous rings. Their statement agrees with our observations in this work.…”

Section: Discussionmentioning

confidence: 99%

Development of the chondrocranium of two caiman species, Caiman latirostris and Caiman yacare

Blanco

2019

Journal of Anatomy

View full text Add to dashboard Cite

show abstract

<b>Histological and immunohistochemical study of the thyroid gland of the broad-snouted caiman (<i>Caiman latirostris</i>)</b> - doi: 10.4025/actascibiolsci.v35i4.18444

Machado-Santos

Teixeira

Sales

et al. 2013

Acta Sci. Biol. Sci.

View full text Add to dashboard Cite

The broad-snouted caiman, Caiman latirostris, is widely distributed in countries of South America. In Brazil it is considered an endangered species because of natural habitat destruction and illegal hunting. In reptiles, the thyroid gland plays an integral part in ecdysis, reproduction, tail regeneration, growth, endocrine function and metabolism rate. The aim of the present study was to characterize the thyroid gland morphology of C. latirostris, based on histochemical and immunohistochemical techniques. The thyroid glands were fixed in Bouin's fluid and serial cross sections were stained with hematoxylin-eosin, Mallory's trichrome, periodic acid-Schiff (PAS) and Alcian blue (AB pH 1.5 and 2.5). The immunohistochemical technique for 5-HT-IR cells was used. The thyroid gland has a dense irregular connective tissue forms a capsule enveloping the gland. There are several follicular acini of varying size lined by simple cuboidal or columnar epithelium in the thyroid gland. The follicles are connected by interfollicular connective tissue which contains blood vessels. We observed the presence of lymph nodes around the entire gland. There was a positive PAS reaction and negative AB reaction in the colloid. 5-HT-IR cells were detected around the follicle cells. No striking morphological differences were observed between C. latirostris and other domesticated mammals.

show abstract

Light microscopic and immunohistochemical study of the trachea of the broad-snouted caiman (Caiman latirostris)

Cited by 2 publications

References 25 publications

Development of the chondrocranium of two caiman species, Caiman latirostris and Caiman yacare

Development of the chondrocranium of two caiman species, Caiman latirostris and Caiman yacare

<b>Histological and immunohistochemical study of the thyroid gland of the broad-snouted caiman (<i>Caiman latirostris</i>)</b> - doi: 10.4025/actascibiolsci.v35i4.18444

Contact Info

Product

Resources

About