Londoño-Burbano Alejandro, Urbano-Bonilla Alexander, Thomas Matthew R
Setor de Ictiologia, Departamento de Vertebrados, Museu Nacional/UFRJ, Rio de Janeiro, Brazil.
Department of Natural History, Royal Ontario Museum, Toronto, Ontario, Canada.
J Fish Biol. 2021 Jan;98(1):154-167. doi: 10.1111/jfb.14566. Epub 2020 Oct 20.
Loricaria cuffyi n. sp. is described based on 36 specimens from the Essequibo and upper Negro River drainages in western Guyana and the upper Orinoco River drainage in Venezuela. The new species can be distinguished from sympatric and geographically proximate congeners by a postorbital notch that is inconspicuous, shallow and rounded, odontode ridges on the dorsum of head and predorsal weakly developed, abdominal plates tightly joined and completely covering the median abdominal space and pectoral girdle, higher anterior lateral plate counts, and coloration characteristics. The distribution of the new species adds to an interesting and well-documented biogeographical pattern exhibited by other Guiana Shield loricariids influenced by the proto-Berbice during the Cenozoic and recent configuration of drainages in the Guiana Shield. We present an update on the taxonomy of Loricaria, and discuss the biogeography and conservation status of the new species.
库菲氏纹胸鮡新物种（Loricaria cuffyi n. sp.）是根据来自圭亚那西部埃塞奎博河和上内格罗河流域以及委内瑞拉奥里诺科河上游流域的36个标本描述的。该新物种可通过以下特征与同域分布和地理上相邻的同属物种区分开来：眶后缺刻不明显、浅且呈圆形；头部背面和背前部的齿突脊发育较弱；腹甲紧密相连，完全覆盖腹部中线空间和胸带；前外侧板数量较多；以及体色特征。新物种的分布增加了一种有趣且有充分记录的生物地理模式，这种模式由其他受新生代原始伯比斯河影响的圭亚那地盾纹胸鮡以及圭亚那地盾近期的水系格局所呈现。我们提供了纹胸鮡属分类的最新情况，并讨论了新物种的生物地理学和保护状况。
