RT Journal Article
T1 Ecological Factors and Diversification among Neotropical Characiforms
A1 Guisande, Cástor
A1 Pelayo Villamil, Patricia
A1 Vera Rodríguez, Manuel
A1 Manjarrés Hernández, Ana
A1 Carvalho, Mónica R.
A1 Vari, Richard P.
A1 Jiménez, Luz Fernanda
A1 Fernández López, José Carlos
A1 Martínez Portela, Paulino
A1 Prieto Piraquive, Edgar Francisco
A1 Granado Lorencio, Carlos
A1 Duque, Santiago R.
AB Morphological and DNA sequence data has been used to propose hypotheses of relationships within the Characiformes with minimal comparative discussion of causes underpinning the major intraordinal diversification patterns. We explore potential primary morphological factors controlling the early diversification process in some Neotropical characiforms as the first step to identifying factors contributing to the pronounced intraordinal morphological and species diversity. A phylogenetic reconstruction based on 16S rDNA (mitochondrial) and 18S rDNA (nuclear) genes provided the framework for the identification of the main morphological differences among the Acestrorhynchidae, Anostomidae, Characidae, Ctenoluciidae, Curimatidae, Cynodontidae, Gasteropelecidae, Prochilodontidae and Serrasalmidae. Results indicate an initial split into two major groupings: (i) species with long dorsal-fin bases relative to the size of other fins (Curimatidae, Prochilodontidae, Anostomidae, Serrasalmidae) which primarily inhabit lakes, swamps, and rivers (lineage I); and (ii) species with short dorsal-fin bases (Acestrorhynchidae, Gasteropelecidae, Characidae) which primarily inhabit creeks and streams (lineage II). The second diversification stage in lineage I involved substantial morphological diversification associated with trophic niche differences among the monophyletic families which range from detritivores to large item predators. Nonmonophyly of the Characidae complicated within lineage II analyzes but yielded groupings based on differences in pectoral and anal fin sizes correlated with life style differences
PB Hindawi
SN 1687-9708
YR 2012
FD 2012
LK http://hdl.handle.net/10347/26140
UL http://hdl.handle.net/10347/26140
LA eng
NO International Journal of Ecology Volume 2012, Article ID 610419, 20 pages doi:10.1155/2012/610419
NO This study was supported by the AMAPEZ project (CGL2006-02155 BOS) of the MEC (Ministry of Education and Science) under FEDER funds from the XUNTA de Galicia and by contributions from the Universidad de Vigo, the Universidad de Antioquia, and the Universidad Nacional de Colombia. A. Manjarrés-Hernández gratefully acknowledges a grant from COLCIENCIAS
DS Minerva
RD 28 abr 2026