一种新的巴西东部亚马逊地区图里亚库流域的甲鲶属（Siluriformes：甲鲶科）物种。

A new species of Loricaria (Siluriformes: Loricariidae) from the Turiaçu River basin, Eastern Amazon region, Brazil.

机构信息

Universidade Federal do Maranhão, Programa de Pós-Graduação em Biodiversidade e Conservação, 65080-805, São Luís, MA, Brazil. Universidade Federal do Maranhão, Departamento de Biologia, Laboratório de Ecologia e Sistemática de Peixes, 65080-805, São Luís, MA, Brazil..

出版信息

Zootaxa. 2021 Jan 22;4915(3):zootaxa.4915.3.10. doi: 10.11646/zootaxa.4915.3.10.

DOI:10.11646/zootaxa.4915.3.10

PMID:33756568

Abstract

A new species of Loricaria is herein described from the Turiaçu River basin, Eastern Amazon region, Maranhão state, Brazil, within the Maranhão Hydrological Unit (MHU). Loricaria turi differs from its congeners mainly by the following combination of characters: abdominal plate development confined to the posterior median region, pectoral girdle mostly naked, with cluster of plates near pectoral fin bases; large eyes (minimum orbital diameter 16.2-20.7% of HL and maximum orbital diameter 19.8-24.0% of HL), 214.4 mm of maximum standard length, and large basicaudal plate (16.6-29.2% of HL). The description of this new species strengthens the hypothesis that the Maranhão Hydrological Unit (MHU) is a possible area of endemism for freshwater fishes and contributes to the knowledge of the freshwater fish diversity and composition of the region.

摘要

本文描述了一种新的铠甲鲶属鱼类，产自巴西马拉尼昂州图里亚库河盆地，属于马拉尼昂水文单元（MHU）。Loricaria turi 与其近缘种主要的区别在于以下特征组合：腹部板仅限于后中线区域，胸带大部分裸露，胸鳍基部有一堆鳞片；大眼睛（最小眼眶直径占头长的 16.2-20.7%，最大眼眶直径占头长的 19.8-24.0%），最大标准体长 214.4 毫米，以及大的基尾骨板（占头长的 16.6-29.2%）。这个新物种的描述加强了马拉尼昂水文单元（MHU）可能是淡水鱼类特有种的假说，并有助于了解该地区淡水鱼类的多样性和组成。