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Evolution of secondary sexual characters in Characidae (Teleostei: Characiformes)

Grant number: 12/01263-2
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): April 01, 2012
Effective date (End): March 31, 2016
Field of knowledge:Biological Sciences - Zoology - Taxonomy of Recent Groups
Principal researcher:Naercio Aquino Menezes
Grantee:Tulio Franco Teixeira
Home Institution: Museu de Zoologia (MZ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:11/50282-7 - An inventory of the Characiform fish fauna (Teleostei, Ostariophysi) from South America, AP.BTA.TEM


Despite de enormous morphologic diversity of its representatives, the family Characidae, has been recognized as a monophyletic group based both on analysis of morphologic and molecular characters. Secondary sexual characters have been recorded and discussed, showing the existence of sexual dimorphism in several Characiformes. However, information about the presence and description of the secondary sexual characters are so sparse way in literature, and little is known about the origin, distribution and phylogenetic and evolutionary significance of these characters in Characidae. This work aims to examine the largest possible number of species and genus of Characidae, in order to detect the presence, describe and determine the phylogenetic and evolutionary significance of these characters in all subfamilies and groups not yet defined in a supra-specific level. The analysis of the secondary sexual characters will be made in stereomicroscope, images of scanning electron microscopy and histology slides of mature adults specimens. It is hoped that the posterior comparative anatomic study allow identifying structures morphologically identical and that the data analysis in conjunction with other characters used in studies of phylogenetic analysis of the groups involved will allow better phylogenetic patterns corroborated evidence. (AU)

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Scientific publications (5)
(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)
LUJAN, NATHAN K.; ARMBRUSTER, JONATHAN W.; WERNEKE, DAVID C.; TEIXEIRA, TULIO FRANCO; LOVEJOY, NATHAN R. Phylogeny and biogeography of the Brazilian-Guiana Shield endemic Corymbophanes clade of armoured catfishes (Loricariidae). ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, v. 188, n. 4, p. 1213-1235, APR 2020. Web of Science Citations: 2.
BIRINDELLI, JOSE L. O.; TEIXEIRA, TULIO F.; BRITSKI, HERALDO A. Two new species of Leporinus Agassiz, 1929 (Characiformes: Anostomidae) from tributaries of the lower Amazon basin in Brazil. Zootaxa, v. 4178, n. 1, p. 97-115, OCT 21 2016. Web of Science Citations: 3.
TEIXEIRA, T. F.; NETTO-FERREIRA, A. L.; BIRINDELLI, J. L. O.; SOUSA, L. M. Two new species of Hyphessobrycon (Characiformes: Characidae) from the headwaters of the Tapajos and Xingu River basins, Para, Brazil. Journal of Fish Biology, v. 88, n. 2, p. 459-476, FEB 2016. Web of Science Citations: 8.
TEIXEIRA, TULIO F.; LIMA, FLAVIO C. T.; ZUANON, JANSEN. A New Hyphessobrycon Durbin from the Rio Teles Pires, Rio Tapajos Basin, Mato Grosso State, Brazil (Characiformes: Characidae). Copeia, n. 4, p. 612-621, DEC 30 2013. Web of Science Citations: 15.

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