Squalus shiraii sp. nov. (Squaliformes, Squalidae), a new species of dogfish shark from Japan with regional nominal species revisited

Autor(es)

Viana, Sarah T. F. L. ^{[1, 2, 3]} ; de Carvalho, Marcelo R. ^{[1, 3]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Biociencias, Dept Zool, Rua Matao, Travessa 14, 101, BR-05508090 Sao Paulo, SP - Brazil

^[2] South African Inst Aquat Biodivers, Private Bag 1015, ZA-6140 Grahamstown - South Africa

^[3] Univ Sao Paulo, Inst Biociencias, Dept Zool, Rua Matao, Travessa 14, 101, BR-05508090 Sao Paulo, SP, Brazil.Viana, Sarah T. F. L., South African Inst Aquat Biodivers, Private Bag 1015, ZA-6140 Grahamstown - South Africa

• Tipo de documento: Artigo Científico
• Fonte: ZOOSYSTEMATICS AND EVOLUTION; v. 96, n. 2, p. 275-311, JUN 10 2020.
• Citações Web of Science: 0

Resumo

A new species of deep-water dogfish shark, Squalus shiraii sp. nov., is described herein as endemic to the tropical waters off Southern Japan. This species has been largely misidentified with S. mitsukurii. However, morphological, meristic and morphometric evidence support it to be a separate and undescribed species. Squalus shiraii sp. nov. differs from this species by having body brown in colour dorsally, caudal fin with ventral and dorsal tips markedly tapered and broadly white, dermal denticles uniscuspidate and lanceolate and larger number of precaudal (91-94) and total vertebrae (120-123) (vs. body dark grey to black; caudal fin with ventral and dorsal tips rounded and not white in colour; denticles tricuspidate and rhomboid; 86-90 precaudal and 116-117 total vertebrae). Squalus shiraii sp. nov. is also clearly separated from other Japanese congeners which are herein revisited to include six species, based on the examination of over 150 specimens caught from Japanese waters that were available in ichthyological collections: S. mitsukurii, S. japonicus, S. acutirostris, S. brevirostris and S. suckleyi. Squalus mitsukurii, S. japonicus and S. brevirostris are re-described in detail and the neotype of S. japonicus is herein designated. Squalus acutirostris is treated as a valid species with occurrences in Japan, China and Taiwan and, thus, a provisional diagnosis is given, as well as an updated diagnosis of S. suckleyi. A key to Squalus species from the North-western Pacific Ocean is given and main morphological differences between S. shiraii sp. nov. and the closest related species are discussed. (AU)

• Processo FAPESP: 14/26503-1 - Revisão taxonômica de espécies da família Squalidae Blainville, 1816 (Elasmobranchii: Chondrichthyes: Squaliformes) da África meridional
• Beneficiário: Sarah Tházia Viana de Figueirêdo
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 13/11621-6 - Análise taxonômica de espécies da família Squalidae blainvillei, 1816 (Elasmobranchii: Chondrichthyes: Squaliformes) depositadas na coleção ictiológica do Natural History Museum (NHM)
• Beneficiário: Sarah Tházia Viana de Figueirêdo
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 11/18861-7 - Revisão taxonômica e morfológica da família Squalidae Blainville, 1816 (Elasmobranchii: Chondrichthyes: Squaliformes)
• Beneficiário: Sarah Tházia Viana de Figueirêdo
• Modalidade de apoio: Bolsas no Brasil - Doutorado