Phylogeny and biogeography of the Brazilian-Guiana Shield endemic Corymbophanes clade of armoured catfishes (Loricariidae)

Autor(es)

Lujan, Nathan K. ^{[1, 2]} ; Armbruster, Jonathan W. ^[3] ; Werneke, David C. ^[3] ; Teixeira, Tulio Franco ^{[4, 5]} ; Lovejoy, Nathan R. ^[2]

Afiliação do(s) autor(es)

^[1] Amer Museum Nat Hist, Dept Ichthyol, New York, NY 10024 - USA

^[2] Univ Toronto Scarborough, Dept Biol Sci, Scarborough, ON M1C 1A4 - Canada

^[3] Auburn Univ, Dept Biol Sci, Auburn, AL 36849 - USA

^[4] Univ Sao Paulo, Museu Zool, BR-04263000 Sao Paulo, SP - Brazil

^[5] Pontificia Univ Catolica Minas Gerais, Programa Posgrad Biol Vertebrados, BR-30535901 Belo Horizonte, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY; v. 188, n. 4, p. 1213-1235, APR 2020.
• Citações Web of Science: 2

Resumo

Numerous rivers, interrupted by large waterfalls and extensive rapids, drain the geologically ancient Guiana Shield Highlands. We describe a new armoured catfish genus and two new species endemic to the upper Ireng and Kuribrong rivers, respective tributaries of the Amazon and Essequibo basins in western Guyana. Corymbophanes ameliae sp. nov. is distinguished by having vermiculations on the abdomen, bands on the caudal fin, the anal fin i,5 and narrow caudal peduncle. Yaluwak primus gen. \& sp. nov. is distinguished by having evertible cheek odontodes, a plated snout, a tall caudal peduncle and absence of adipose fin and iris operculum. We present a new molecular phylogenetic analysis inclusive of these and several related genera that suggests that the Corymbophanes clade (Araichthys, Corymbophanes, Cryptancistrus, Guyanancistrus, Hopliancistrus and Yaluwak) originated in the Guiana Shield with secondary dispersal to the Brazilian Shield. Within the Guiana Shield, relationships among Corymbophanes and Yaluwak are consistent with geodispersal between drainages via headwater capture, although an uplift-mediated relictual distribution cannot be ruled out. ND2 haplotype structure among C. ameliae populations suggests that ichthyofaunal diversity on the Guiana Shield escarpment is shaped not only by inter-, but also intrafluvial barriers to gene flow. (AU)

• Processo FAPESP: 12/01263-2 - Evolução dos caracteres sexuais secundários em Characidae (Teleostei: Characiformes)
• Beneficiário: Tulio Franco Teixeira
• Modalidade de apoio: Bolsas no Brasil - Doutorado