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Taxonomic review of the family Gymnuridae (Chondrichthyes: Myliobatoidei)

Grant number: 12/02349-8
Support type:Regular Research Grants
Duration: July 01, 2012 - June 30, 2014
Field of knowledge:Biological Sciences - Zoology - Taxonomy of Recent Groups
Principal researcher:Marcelo Rodrigues de Carvalho
Grantee:Marcelo Rodrigues de Carvalho
Home Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Assoc. researchers:Leandro Yokota


The family Gymnuridae is represented by marine, demersal and coastal rays. The butterfly-rays occur in three main geographic regions: Indian Ocean and Indo-Pacific region, Eastern Pacific Ocean and Atlantic Ocean (including Mediterranean). Although these rays are easily distinguished from other batoids, their representatives are very similar morphologically and, at the same time, exhibit considerable intraspecific variation. These factors have led to taxonomic confusion at the generic and specific levels within the family. Currently the family is represented by two genera and 10 to 13 valid species (out of some 25 available nominal species), however the validity of the genus Aetoplatea has been questioned. In general, the species have available only superficial and brief descriptions, and taxonomic uncertainties involving the identification and distinction of these rays are common. There are questionable species, populations that have been treated as the same species but that in reality may represent different taxonomic units, as well as populations considered as distinct taxonomic units that may, in fact, be the same species. This study aims to review taxonomically the family Gymnuridae through multivariate analysis and morphological investigative techniques (morphometry, meristic analysis, and comparative morphology of the skeleton, laterosensory system and muscles), considering specimens from different geographic regions within the supposed distribution of the species. Uncertainty about the taxonomic status of species limits the development of basic research that subsidizes the management and conservation of populations. (AU)

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Scientific publications (15)
(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)
PETEAN, FLAVIA DE FIGUEIREDO; DE CARVALHO, MARCELO R. Comparative morphology and systematics of the cookiecutter sharks, genus Isistius Gill (1864) (Chondrichthyes: Squaliformes: Dalatiidae). PLoS One, v. 13, n. 8 AUG 20 2018. Web of Science Citations: 0.
DA SILVA, JOAO PAULO C. B.; VAZ, DIEGO F. B.; DE CARVALHO, MARCELO R. Phylogenetic inferences on the systematics of squaliform sharks based on elasmobranch scapular morphology (Chondrichthyes: Elasmobranchii). ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, v. 182, n. 3, p. 614-630, MAR 2018. Web of Science Citations: 1.
JONES, CHRISTIAN M.; HOFFMAYER, ERIC R.; HENDON, JILL M.; QUATTRO, JOSEPH M.; LEWANDOWSKI, JUSTIN; ROBERTS, MARK A.; POULAKIS, GREGG R.; AJEMIAN, MATTHEW J.; DRIGGERS, III, WILLIAM B.; DE CARVALHO, MARCELO R.; REGO, MARIANA G.; HAZIN, FABIO H. V.; MARQUEZ-FARIAS, J. FERNANDO. Morphological conservation of rays in the genus Rhinoptera (Elasmobranchii, Rhinopteridae) conceals the occurrence of a large batoid, Rhinoptera brasiliensis Muller, in the northern Gulf of Mexico. Zootaxa, v. 4286, n. 4, p. 499-514, JUL 4 2017. Web of Science Citations: 2.
VIANA, SARAH T. DE F.; DE CARVALHO, MARCELO R.; GOMES, ULISSES L. Taxonomy and morphology of species of the genus Squalus Linnaeus, 1758 from the Southwestern Atlantic Ocean (Chondrichthyes: Squaliformes: Squalidae). Zootaxa, v. 4133, n. 1, p. 1-89, JUL 4 2016. Web of Science Citations: 12.
DE CARVALHO, MARCELO R.; WHITE, WILLIAM T. Narcine baliensis, a new species of electric ray from southeast Asia (Chondrichthyes: Torpediniformes). Zootaxa, v. 4127, n. 1, p. 149-160, JUN 22 2016. Web of Science Citations: 1.
DE CARVALHO, MARCELO R.; ROSA, RICARDO S.; DE ARAUJO, MARIA LUCIA G. A new species of Neotropical freshwater stingray (Chondrichthyes: Potamotrygonidae) from the Rio Negro, Amazonas, Brazil: the smallest species of Potamotrygon. Zootaxa, v. 4107, n. 4, p. 566-585, MAY 4 2016. Web of Science Citations: 9.
FONTENELLE, JOAO PEDRO; DE CARVALHO, MARCELO R. Systematic Implications of Brain Morphology in Potamotrygonidae (Chondrichthyes: Myliobatiformes). Journal of Morphology, v. 277, n. 2, p. 252-263, FEB 2016. Web of Science Citations: 6.
SOARES, KARLA D. A.; GOMES, ULISSES L.; DE CARVALHO, MARCELO R. Taxonomic review of catsharks of the Scyliorhinus haeckelii group, with the description of a new species (Chondrichthyes: Carcharhiniformes: Scyliorhinidae). Zootaxa, v. 4066, n. 5, p. 501-534, JAN 19 2016. Web of Science Citations: 3.
DA SILVA, JOAO PAULO C. B.; VAZ, DIEGO F. B.; DE CARVALHO, MARCELO R. Systematic Implications of the Anterior Pectoral Basals in Squaliform Sharks (Chondrichthyes: Elasmobranchii). Copeia, v. 103, n. 4, p. 874-885, DEC 2015. Web of Science Citations: 3.
DA SILVA, JOAO PAULO C. B.; DE CARVALHO, MARCELO R. Morphology and phylogenetic significance of the pectoral articular region in elasmobranchs (Chondrichthyes). Zoological Journal of the Linnean Society, v. 175, n. 3, p. 525-568, NOV 2015. Web of Science Citations: 9.
DA SILVA, JOAO PAULO C. B.; DE CARVALHO, MARCELO R. Systematics and morphology of Potamotrygon orbignyi (Castelnau, 1855) and allied forms (Chondrichthyes: Myliobatiformes: Potamotrygonidae). Zootaxa, v. 3982, n. 1, p. 1-82, JUL 8 2015. Web of Science Citations: 13.
FONTENELLE, JOAO PEDRO; DA SILVA, JOAO PAULO C. B.; DE CARVALHO, MARCELO R. Potamotrygon limai, sp nov., a new species of freshwater stingray from the upper Madeira River system, Amazon basin (Chondrichthyes: Potamotrygonidae). Zootaxa, v. 3765, n. 3, p. 249-268, FEB 18 2014. Web of Science Citations: 18.
CARVALHO, MURILO; BOCKMANN, FLAVIO ALICINO; DE CARVALHO, MARCELO RODRIGUES. Homology of the Fifth Epibranchial and Accessory Elements of the Ceratobranchials among Gnathostomes: Insights from the Development of Ostariophysans. PLoS One, v. 8, n. 4 APR 18 2013. Web of Science Citations: 15.

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