Artigo

Comparative morphology of the axial skeleton in the family trichodactylidae freshwater crabs (Crustacea: Decapoda: Brachyura)

The axial skeleton is a complex structure of cuticular origin, formed by sclerotic plates of thoracic sternite and pleurites as well as its internal invaginations. The ventral characters of the axial skeleton, reflected externally in the suture lines of the thoracic sternum, are an important classif...

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Autor principal: Pedraza, Manuel
Outros Autores: Magalhães, Célio, Tavares, Marcos
Grau: Artigo
Idioma: English
Publicado em: Papeis Avulsos de Zoologia 2020
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/15919
id oai:repositorio:1-15919
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spelling oai:repositorio:1-15919 Comparative morphology of the axial skeleton in the family trichodactylidae freshwater crabs (Crustacea: Decapoda: Brachyura) Morfología comparada del esqueleto axial en la familia de cangrejos de agua dulce Trichodactylidae (Crustacea: Decapoda: Brachyura) Pedraza, Manuel Magalhães, Célio Tavares, Marcos The axial skeleton is a complex structure of cuticular origin, formed by sclerotic plates of thoracic sternite and pleurites as well as its internal invaginations. The ventral characters of the axial skeleton, reflected externally in the suture lines of the thoracic sternum, are an important classification criteria for the current suprageneric system of Trichodactylidae: (Trichodactylinae & Dilocarcininae (Dilocarcinini + Valdiviini)). In order to test this hypothesis, the internal and external characters of the axial skeleton of 42 adult crabs belonging to 17 species and 10 genera were examined. For the material preparation the crabs were dissected and their skeletons submerged in a hot solution of potassium hydroxide (KOH) for a period of 24 to 48 hours. Variations in the shape, orientation and conformation of the thoracic sternum, pleural roof, ventral and dorsal phragmas and junction plate were described from anatomical preparations. Based on these characteristics, the species were separated into three groups, which are consistent with the proposed classification of Trichodactylidae into subfamilies and tribes. This study highlights the importance of the morphological characteristics of the axial skeleton for Trichodactylidae taxonomy. 2020-05-20T14:15:54Z 2020-05-20T14:15:54Z 2015 Artigo https://repositorio.inpa.gov.br/handle/1/15919 10.1590/0031-1049.2015.55.07 en Volume 55, Número 7, Pags. 103-114 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Papeis Avulsos de Zoologia
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
description The axial skeleton is a complex structure of cuticular origin, formed by sclerotic plates of thoracic sternite and pleurites as well as its internal invaginations. The ventral characters of the axial skeleton, reflected externally in the suture lines of the thoracic sternum, are an important classification criteria for the current suprageneric system of Trichodactylidae: (Trichodactylinae & Dilocarcininae (Dilocarcinini + Valdiviini)). In order to test this hypothesis, the internal and external characters of the axial skeleton of 42 adult crabs belonging to 17 species and 10 genera were examined. For the material preparation the crabs were dissected and their skeletons submerged in a hot solution of potassium hydroxide (KOH) for a period of 24 to 48 hours. Variations in the shape, orientation and conformation of the thoracic sternum, pleural roof, ventral and dorsal phragmas and junction plate were described from anatomical preparations. Based on these characteristics, the species were separated into three groups, which are consistent with the proposed classification of Trichodactylidae into subfamilies and tribes. This study highlights the importance of the morphological characteristics of the axial skeleton for Trichodactylidae taxonomy.
format Artigo
author Pedraza, Manuel
spellingShingle Pedraza, Manuel
Comparative morphology of the axial skeleton in the family trichodactylidae freshwater crabs (Crustacea: Decapoda: Brachyura)
author2 Magalhães, Célio
Tavares, Marcos
author2Str Magalhães, Célio
Tavares, Marcos
title Comparative morphology of the axial skeleton in the family trichodactylidae freshwater crabs (Crustacea: Decapoda: Brachyura)
title_short Comparative morphology of the axial skeleton in the family trichodactylidae freshwater crabs (Crustacea: Decapoda: Brachyura)
title_full Comparative morphology of the axial skeleton in the family trichodactylidae freshwater crabs (Crustacea: Decapoda: Brachyura)
title_fullStr Comparative morphology of the axial skeleton in the family trichodactylidae freshwater crabs (Crustacea: Decapoda: Brachyura)
title_full_unstemmed Comparative morphology of the axial skeleton in the family trichodactylidae freshwater crabs (Crustacea: Decapoda: Brachyura)
title_sort comparative morphology of the axial skeleton in the family trichodactylidae freshwater crabs (crustacea: decapoda: brachyura)
publisher Papeis Avulsos de Zoologia
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/15919
_version_ 1787145070435106816
score 11.755432

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