Zawadzki Cláudio Henrique, DE Oliveira Renildo Ribeiro, Oliveira Andreza Dos Santos, Py-Daniel Lúcia Rapp
Universidade Estadual de Maringá. Departamento de Biologia. Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia), Av. Colombo - 5790, G90 - S. 18B, 87020-900, Maringá, Paraná State, Brazil..
Zootaxa. 2020 Mar 11;4750(2):zootaxa.4750.2.3. doi: 10.11646/zootaxa.4750.2.3.
In the midst of the effervescent discussions of climate change and setbacks in national environmental protection mechanisms, the Brazilian Amazon and its ichthyofauna are in the spotlight. Therefore, in this work we redescribe Hypostomus carinatus (Steindachner 1881), a little known medium-sized Amazonian species, providing means for its correct identification and taxonomic stabilization. In this way, based on the analysis of type specimens and recently collected material, H. carinatus is redescribed and its geographical distribution is expanded to the basins of the Branco, Japurá, Juruá, Solimões, Negro, Tapajós, Trombetas and Uatumã rivers. A lectotype of the Plecostomus carinatus is designated herein. Hypostomus carinatus is mainly distinguished from congeners by the presence of four to ten predorsal plates posteriorly surrounding parieto-supraoccipital bone; dark spots on body and fins; by having the dark spots smaller or almost equal to distance among each spot; body carenae armored with odontodes; and compressed head with eyes laterally positioned.
在关于气候变化的热烈讨论以及国家环境保护机制遭遇挫折的背景下，巴西亚马逊地区及其鱼类区系备受关注。因此，在这项工作中，我们重新描述了Hypostomus carinatus（施泰因达赫纳，1881年），这是一种鲜为人知的中型亚马逊物种，为其正确识别和分类稳定提供了方法。通过这种方式，基于对模式标本和最近采集材料的分析，重新描述了H. carinatus，并将其地理分布扩展到布兰科河、雅普拉河、茹鲁阿河、索利蒙伊斯河、内格罗河、塔帕若斯河、特龙贝塔斯河和乌阿图马河的流域。在此指定了Plecostomus carinatus的选模标本。Hypostomus carinatus主要与同属物种的区别在于，在顶枕骨后方有四到十块背前板；身体和鱼鳍上有黑斑；黑斑较小或几乎等于每个斑点之间的距离；身体棱脊覆盖有齿状突起；头部扁平，眼睛位于两侧。
