托梅特斯克兰波纳哈和托梅特斯环吻脂鲤（脂鲤目：锯脂鲤科），两种新的食草锯脂鲤，也是首个从巴西地盾描述的托梅特斯属物种。

Tometes kranponhah and Tometes ancylorhynchus (Characiformes: Serrasalmidae), two new phytophagous serrasalmids, and the first Tometes species described from the Brazilian Shield.

作者信息

Andrade M C, Jégu M, Giarrizzo T

机构信息

Universidade Federal do Pará, Laboratório de Biologia Pesqueira e Manejo dos Recursos Aquáticos, Av. Perimetral 2651, 66040-830, Belém, PA, Brazil.

Programa de Pós-Graduação em Ecologia Aquática e Pesca, Universidade Federal do Pará, Av. Augusto Corrêa 1, 66075-110, Belém, PA, Brazil.

出版信息

J Fish Biol. 2016 Jul;89(1):467-94. doi: 10.1111/jfb.12868. Epub 2016 Jan 4.

DOI:10.1111/jfb.12868

PMID:26725331

Abstract

Two new species of Tometes from the Brazilian Shield rapids are described. Tometes kranponhah is endemic to the Xingu River basin, whereas Tometes ancylorhynchus occurs both in the Xingu and the Tocantins-Araguaia River basins. The two species are sympatric in the Xingu drainages and have many similarities in morphology and colouration. Major diagnostic differences are the dark pigmentation on the opercle of T. kranponhah and its distinct snout shape and arrangement of premaxillary teeth. In addition, T. kranponhah is a large fish that is abundant in the Xingu River, whereas T. ancylorhynchus is a medium-sized fish for which there are few records.

摘要

描述了来自巴西地盾急流的两种新托梅特斯属鱼类。克兰波尼亚托梅特斯（Tometes kranponhah）是欣古河流域特有的物种，而钩吻托梅特斯（Tometes ancylorhynchus）则同时出现在欣古河和托坎廷斯-阿拉瓜亚河流域。这两个物种在欣古河排水区域同域分布，在形态和颜色上有许多相似之处。主要的诊断差异在于克兰波尼亚托梅特斯鳃盖骨上的深色色素沉着及其独特的吻部形状和前颌骨牙齿排列。此外，克兰波尼亚托梅特斯是一种大型鱼类，在欣古河中数量丰富，而钩吻托梅特斯是一种中型鱼类，记录较少。