Conde-Saldaña Cristhian C, Albornoz-Garzón Juan G, García-Melo Jorge E, Dergam Jorge A, Villa-Navarro Francisco A
Laboratório de Biologia e Genética de Peixes, Departamento de Morfologia, IBB-UNESP ''Júlio de Mesquita Filho", R. Prof. Dr. Antônio Celso Wagner Zanin, 250, 18618-689, Botucatu, SP, Brazil..
Zootaxa. 2019 Sep 12;4668(4):zootaxa.4668.4.8. doi: 10.11646/zootaxa.4668.4.8.
A new species of Pimelodella is described from northern coastal drainages of the Sierra Nevada de Santa Marta (SNSM), Colombia. The new species is diagnosed from all trans-Andean congeners by the following unique combination of characters: head length 22.2-23.7% SL, bony interorbital width 17.6-21.6% HL, maxillary barbels length 53.0-68.3% SL, inner mental-barbels length 14.4-20.0% SL, body width 17.6-21.1% SL, dorsal-fin spine length 8.3-13.7% SL, dorsal-fin base 12.3-14.9% SL, pectoral-fin spine length 12.9-14.5% SL, pectoral-fin spine length without dentations on the distal posterior margin 21.6-29.8% in pectoral-fin spine length, maximum depth of dentations in posterior margin of pectoral-fin spine 1.40-1.68 times in the width of the spine at its base, adipose-fin base length 22.8-26.4% SL, caudal-peduncle depth 9.2-10.5% SL, 40 vertebrae, having a conspicuous paired dark brown stripe on the dorsal surface of body, extending from posterior margin of head to caudal-fin insertion and a wide dark brown midlateral stripe present. The isolated occurrence of this new taxon living in allopatry in coastal drainages of the SNSM could have interesting biogeographic implications for dispersal and vicariance processes of the ichthyofauna from northern South America.
一种新的拟鲿属物种被描述于哥伦比亚圣玛尔塔内华达山脉（SNSM）北部沿海流域。该新物种通过以下独特的特征组合与所有跨安第斯山脉的同属物种相区分：头长为标准体长（SL）的22.2 - 23.7%，眶间骨宽为头长（HL）的17.6 - 21.6%，上颌须长为标准体长的53.0 - 68.3%，内侧颏须长为标准体长的14.4 - 20.0%，体宽为标准体长的17.6 - 21.1%，背鳍棘长为标准体长的8.3 - 13.7%，背鳍基部为标准体长的12.3 - 14.9%，胸鳍棘长为标准体长的12.9 - 14.5%，胸鳍棘远端后缘无齿的长度占胸鳍棘长的21.6 - 29.8%，胸鳍棘后缘齿的最大深度为基部棘宽的1.40 - 1.68倍，脂鳍基部长度为标准体长的22.8 - 26.4%，尾柄深为标准体长的9.2 - 10.5%，有40枚椎骨，在身体背表面有一条明显的成对深褐色条纹，从头部后缘延伸至尾鳍插入处，还有一条宽的深褐色中侧条纹。这个新分类单元在SNSM沿海流域异域分布的孤立情况，可能对南美洲北部鱼类区系的扩散和隔离过程具有有趣的生物地理学意义。
