A new species of Characidium Reinhardt (Ostariophysi: Characiformes: Crenuchidae) from headwaters of rio Pacaas Novos, rio Madeira basin, Rondonia, Brazil

Autor(es)

Zanata, Angela M. ^[1] ; Ohara, Willian M. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Bahia, Inst Biol, Dept Zool, BR-40170290 Salvador, BA - Brazil

^[2] Univ Sao Paulo, Museu Zool, BR-04299970 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Zootaxa; v. 4021, n. 2, p. 368-376, SEP 25 2015.
• Citações Web of Science: 7

Resumo

Characidium summus, new species, is described from rio Pacaas Novos, rio Madeira basin, Rondonia, Brazil. The new species is the unique among congeners for completely lacking an adipose fin and having a complete lateral line. Characidium summus can be further distinguished from congeners, including C. vestigipinne that also has a complete lateral line and adipose fin absent, vestigial or reduced by the absence of dark bars or spots on head, body or fins, except for a dark blotch on the rear of the opercle, a narrow midlateral dark stripe, and a dark basicaudal spot. In addition, C. summus possess a vestigial supraorbital and a remarkably small pseutotympanum. The possible mimetic relationship between the new species with Erythrinus erythrinus is discussed. (AU)

• Processo FAPESP: 13/22473-8 - Endemismo e análise biogeográfica dos peixes da Bacia do Rio Madeira
• Beneficiário: Willian Massaharu Ohara
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 11/50282-7 - Inventário da fauna de Characiformes (Teleostei, Ostariophysi) da América do Sul
• Beneficiário: Naercio Aquino Menezes
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático