Description of a new species of the catfish genus Trichomycterus (Teleostei: Siluriformes: Trichomycteridae) from the rio de Contas basin, northeastern Brazil

Vertebrate Zoology

article

Maria Anaïs Barbosa¹  Wilson José Eduardo Moreira da Costa² 

[1] Laboratório de Sistemática e Evolução de Peixes Teleósteos, Departamento de Zoologia, Universidade Federal do Rio de Janeiro, Cidade Universitária;Rio de Janeiro;Universidade Federal do Rio de Janeiro

关键词: Caatinga;    Loricarioidea;    Neotropical ichthyofauna;    semi-arid region;    systematics;    taxonomy;    Trichomycterinae.;   

DOI  :  10.3897/vz.61.e31157

学科分类：社会科学、人文和艺术（综合）

来源: Pensoft

【 摘 要 】

Trichomycterus tete, new species is described from the upper rio de Contas basin, northeastern Brazil. It is the fi rst record of the genus to the Caatinga semi-arid region. The new species is distinguished from all its congeners by having a combination of eight pectoral-fin rays, the fi rst pectoral-fin ray prolonged as a fi lament, metapterygoid deeper than wide, short maxillary barbel reaching the middle of opercular patch of odontodes, narrow head (head width 68.07 – 77.5% HL), 11 dorsal-fin rays, caudal fin truncated, body slender (body depth 12.3 – 13.6% SL), shorter dorsal-fin base (dorsal-fin base length 9.5 – 11.4% SL), and an uncommon color pattern. In addition, T. tete differs from all the congeners from southeastern Brazil by having a deep area at the external edge of the hypobranchial 1.

【 授权许可】

CC BY