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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Two new species of short-snouted dogfish sharks of the genus Squalus Linnaeus, 1758, from southern Africa (Chondrichthyes: Squaliformes: Squalidae)

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Viana, Sarah T. de F. L. [1] ; Lisher, Mark W. [2] ; de Carvalho, Marcelo R. [1]
Total Authors: 3
[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, Somerset St, ZA-6140 Grahamstown, EC - South Africa
Total Affiliations: 2
Document type: Journal article
Source: MARINE BIODIVERSITY; v. 48, n. 4, p. 1787-1814, DEC 2018.
Web of Science Citations: 4

Species composition of the genus Squalus from the eastern Atlantic and western Indian oceans is still poorly known, with three to four species often recognized: S. acanthias, S. megalops, S. blainvillei, and S. mitsukurii. A fifth species, S. acutipinnis, was recently redescribed as valid in the region, although morphological variation was noted among its type specimens that indicated the presence of two different forms. The second form is described herein as Squalus margaretsmithae sp. nov. and distinguished from S. acutipinnis based on external morphological characters. Squalus mahia sp. nov. is also described from southern Africa based mostly on material collected from Madagascar. Squalus mahia sp. nov. stands out from other Squalus species by having a conspicuously slender body, elongate and thin dorsal fin spines, narrow caudal fin, and other external proportions. These two species are often misidentified with the Australian S. megalops because they share a short snout, white postventral caudal margins, lanceolate and unicuspid dermal denticles, and a low number of vertebrae. Comparative analyses are provided here between Squalus margaretsmithae sp. nov., Squalus mahia sp. nov., and morphologically similar species that also share these features, including S. brevirostris, S. crassispinus, S. acutipinnis, S. altipinnis, and S. hemipinnis. A taxonomic evaluation of the nominal species S. megalops and its occurrence in the region is also discussed. (AU)

FAPESP's process: 11/18861-7 - Taxonomic and morphological revision of the family Squalidae Blainville, 1816 (Elasmobranchii: Chondrichthyes: Squaliformes)
Grantee:Sarah Tházia Viana de Figueirêdo
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 14/26503-1 - Taxonomic revision of species of the family Squalidae Blainville, 1816 (Elasmobranchii: Chondrichthyes: Squaliformes) from Southern Africa
Grantee:Sarah Tházia Viana de Figueirêdo
Support type: Scholarships abroad - Research Internship - Doctorate