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Taxonomic and morphological revision of the family Squalidae Blainville, 1816 (Elasmobranchii: Chondrichthyes: Squaliformes)

Grant number: 11/18861-7
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): December 01, 2011
Effective date (End): March 31, 2016
Field of knowledge:Biological Sciences - Zoology - Taxonomy of Recent Groups
Principal researcher:Marcelo Rodrigues de Carvalho
Grantee:Sarah Tházia Viana de Figueirêdo
Home Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated scholarship(s):14/26503-1 - Taxonomic revision of species of the family Squalidae Blainville, 1816 (Elasmobranchii: Chondrichthyes: Squaliformes) from Southern Africa, BE.EP.DR   13/11621-6 - Taxonomic analysis of the species of the family Squalidae Blainvillei, 1816 (Elasmobranchii: Chondrichthyes: Squaliformes) held at the ichthyology collection of the Natural History Museum (NHM), BE.EP.DR


The family Squalidae comprises two genera of sharks, Squalus and Cirrhigaleus, whose species have a complex taxonomy due to the difficulty of distinguishing them morphologically, associated to an uncertainty in relation to the application of many nominal species, requiring a taxonomic revision. Currently, the genus Squalus contains 25 valid species with wide distribution that are divided into three "groups of species": S. acanthias, S. megalops and S. mitsukurii groups. Cirrhigaleus, a less diverse genus, includes three species that are restricted to the Indian, South Pacific and South Atlantic oceans. Generic distinction among species of Squalus and Cirrhigaleus still requires corroboration, in particular C. asper. Morphological variation within some species is also evident in many geographic regions that may be indicative of the existence of species not yet recognized. Therefore, accompanying a global tendency in enhancing our knowledge about the diversity of Chondrichthyes and elucidate the existence of morphological variations in species of widely distributed groups, a taxonomic revision of the family Squalidae will be undertaken in order to globally delimit the valid species of Squalus and Cirrhigaleus, elucidating the correct application of the nominal species available for each genus. The present study aims to analyze in detail the external morphology and skeleton of the valid species recognized, providing efficient morphological subsidies that may be integrated in future phylogenetic analyses of the family. (AU)

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Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
VIANA, SARAH T. F. L.; DE CARVALHO, MARCELO R. Squalus shiraii sp. nov. (Squaliformes, Squalidae), a new species of dogfish shark from Japan with regional nominal species revisited. ZOOSYSTEMATICS AND EVOLUTION, v. 96, n. 2, p. 275-311, JUN 10 2020. Web of Science Citations: 0.
VIANA, SARAH T. DE F. L.; LISHER, MARK W.; DE CARVALHO, MARCELO R. Two new species of short-snouted dogfish sharks of the genus Squalus Linnaeus, 1758, from southern Africa (Chondrichthyes: Squaliformes: Squalidae). MARINE BIODIVERSITY, v. 48, n. 4, p. 1787-1814, DEC 2018. Web of Science Citations: 4.
VIANA, S. T. F. L.; DE CARVALHO, M. R. Resurrection and Redescription of the Southern Dogfish Squalus probatovi (Squalidae), a Valid Species from Angola. JOURNAL OF ICHTHYOLOGY, v. 58, n. 5, p. 617-632, SEP 2018. Web of Science Citations: 1.
VIANA, S. T. DE. F. L.; DE CARVALHO, M. R.; EBERT, D. A. Squalus bassi sp nov., a new long-snouted spurdog (Chondrichthyes: Squaliformes: Squalidae) from the Agulhas Bank. Journal of Fish Biology, v. 91, n. 4, p. 1178-1207, OCT 2017. Web of Science Citations: 3.
VIANA, SARAH T. DE F.; DE CARVALHO, MARCELO R. Redescription of Squalus acutipinnis Regan, 1908, a Valid Species of Spiny Dogfish from Southern Africa (Chondrichthyes: Squaliformes: Squalidae). Copeia, v. 104, n. 2, p. 539-553, JUL 2016. Web of Science Citations: 7.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
FIGUEIRÊDO, Sarah Tházia Viana de. Taxonomic and morphological revision of the Family Squalidae Blainville, 1816 (Elasmobranchii: Chondrichthyes: Squaliformes). 2016. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Biociências (IBIOC/SB) São Paulo.

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