Chuctaya Junior, Nitschke Pedro, Andrade Marcelo C, Wingert Juliana, Malabarba Luiz R
Programa de Pós-Graduação em Biologia Animal, Departamento de Zoologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
Laboratorio de Ictiología, Museo de Historia Natural, Universidad Nacional Mayor de San Marcos, Lima, Peru.
J Fish Biol. 2022 Dec;101(6):1388-1404. doi: 10.1111/jfb.15207. Epub 2022 Oct 9.
A new species of Geophagus sensu stricto is described from the Tapajos River basin, Brazil, elevating the number of species of the genus to 21. The new species is of commercial importance and is known in the aquarist trade as Geophagus 'red head'. The new species is diagnosed using an integrative approach, based on mitochondrial DNA analysis along with morphological evidence. The new species is distinguished from all congeners by the absence of markings on the head, the bar pattern composed by nine vertical bars on the flanks and the presence of distinct longitudinal bands in the caudal fin. Additionally, it shows a genetic distance of at least 2.0% in cytochrome b gene sequences from its closest congeners. Molecular analysis including most genera of Cichlidae from South America corroborates that the new species belongs to the group of Geophagus sensu stricto.
一种新的狭义丽体鱼属物种在巴西塔帕若斯河流域被描述，这使得该属的物种数量增加到21种。这种新物种具有商业重要性，在水族贸易中被称为丽体鱼属“红头”。该新物种采用综合方法进行鉴定，基于线粒体DNA分析以及形态学证据。该新物种与所有同属物种的区别在于头部无斑纹、体侧由九条垂直条纹组成的条纹图案以及尾鳍中存在明显的纵向条纹。此外，它与最接近的同属物种在细胞色素b基因序列上的遗传距离至少为2.0%。包括来自南美洲丽鱼科大多数属的分子分析证实，该新物种属于狭义丽体鱼属类群。
