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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.)

Taxonomy and morphology of species of the genus Squalus Linnaeus, 1758 from the Southwestern Atlantic Ocean (Chondrichthyes: Squaliformes: Squalidae)

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Author(s):
Viana, Sarah T. De F. [1] ; De Carvalho, Marcelo R. [1] ; Gomes, Ulisses L. [2]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Inst Biociencias, Dept Zool, Rua Matao, Trav 14, 101, BR-05508090 Sao Paulo, SP - Brazil
[2] Univ Estado Rio De Janeiro, Inst Biol, Dept Zool, Rua Sao Francisco Xavier 524, BR-20550900 Maracana, RJ - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Zootaxa; v. 4133, n. 1, p. 1-89, JUL 4 2016.
Web of Science Citations: 12
Abstract

Squalus is a genus of reportedly cosmopolitan shark species that have a high taxonomic complexity due to difficulties in their morphological differentiation; many of its species need revision. Currently, there are 26 valid species of Squalus, which have been divided into three species-groups according to overall morphological similarity, the S. acanthias, S. megalops, and S. mitsukurii groups. Loss of type specimens, propagation of erroneous identifications in the literature, and difficulties in obtaining representative series for comparison are secondary challenges that have impeded a global taxonomic revision of the genus. This problem applies clearly to species from the Southwestern Atlantic Ocean, including species that occur off Brazil. Following a current global tendency, a regional taxonomic revision of Squalus was conducted in order to investigate which species are valid in the Southwestern Atlantic Ocean and provide diagnostic morphological characters that can be efficiently used for identifying species. Comparative detailed analysis of external (e.g. morphometrics, dentition, and color pattern) and skeletal morphology (primarily meristic data, neurocrania and claspers) of specimens of Squalus from the region revealed four new species that are herein described (S. albicaudus sp. nov., S. bahiensis sp. nov., S. lobularis sp. nov., and S. quasimodo sp. nov.), as well as S. acanthias, which is redescribed from the region based on new material. Comparisons are offered based on examinations of congeneric species; this work is part of a global systematic revision of Squalus. (AU)

FAPESP's process: 12/05391-5 - Molecular evolution of regulatory regions of HOX genes associated with the morphology of fish fins, with special emphasis on Chondrichthyes
Grantee:Marcelo Rodrigues de Carvalho
Support Opportunities: Regular Research Grants
FAPESP's process: 12/02349-8 - Taxonomic review of the family Gymnuridae (Chondrichthyes: Myliobatoidei)
Grantee:Marcelo Rodrigues de Carvalho
Support Opportunities: Regular Research Grants
FAPESP's process: 12/09877-0 - Comparative analysis of the morphology of the feeding apparatus in Myliobatiform rays (Chondrichthyes: Batoidea)
Grantee:Marcelo Rodrigues de Carvalho
Support Opportunities: Regular Research Grants