Ecomorphological, space, and mineral relations of dermal denticles in angular angel shark (Squatina guggenheim).

Autor: de Lima Viliod MC; Laboratory of Morphology (LAMAF), Institute of Biosciences, São Paulo State University (UNESP), Rio Claro, Brazil., Rangel BS; Laboratory of Metabolism and Reproduction of Aquatic Animals, Department of Physiology, Institute of Biosciences, University of São Paulo, São Paulo, Brazil., Rocha LC; Laboratory of Morphology (LAMAF), Institute of Biosciences, São Paulo State University (UNESP), Rio Claro, Brazil., Dos Santos Domingos JF; Center for Research and Development, Fisheries Institute, Santos, Brazil., Malavasi-Bruno CE; Department of Anatomy, Institute of Biomedical Sciences-III, University of São Paulo-USP, São Paulo, Brazil., de Amorim AF; Center for Research and Development, Fisheries Institute, Santos, Brazil., Watanabe IS; Department of Anatomy, Institute of Biomedical Sciences-III, University of São Paulo-USP, São Paulo, Brazil., Ciena AP; Laboratory of Morphology (LAMAF), Institute of Biosciences, São Paulo State University (UNESP), Rio Claro, Brazil.
Jazyk: angličtina
Zdroj: Microscopy research and technique [Microsc Res Tech] 2021 Sep; Vol. 84 (9), pp. 2017-2023. Date of Electronic Publication: 2021 Mar 18.
DOI: 10.1002/jemt.23757
Abstrakt: Shark skin is predominantly specialized for swimming and protection, with the dermal denticle being the main structure associated with these abilities. The dermal denticle is a mineral structure with a unique morphology for each species, which allows its use as a taxonomic tool. Few studies have investigated the microscopy aspects of skin and dermal denticles, considering the high diversity of sharks. Here, we investigated the three-dimensional morphoquantitative aspects and mineral composition of dermal denticles in different regions of the angular angel shark, Squatina guggenheim, using scanning electron microscopy and dispersive energy system. With the microscopy, we were able to observe that the dermal denticle morphology changes according to the area it is located. It was possible to describe the dermal denticles individually, from root to the crown, highlighting all of their individualities. Through the dispersive energy system, we showed the proportions of each mineral found in the denticle, by area, demonstrating the composition and the particularities of crown, body, and root, where whitlockite was described for the first time in elasmobranchs. In this way, the present study presented the specificities of the dermal denticles of S. guggenheim, as well sought to understand the different structure functions for the animal, thus assisting future research in animal morphology.
(© 2021 Wiley Periodicals LLC.)
Databáze: MEDLINE
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