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Deep Phylogenetic Divergence and Lack of Taxonomic Concordance in Species of Astronotus (Cichlidae)
Joint Authors
Hrbek, Tomas
Toffoli, Daniel
Farias, Izeni Pires
Meliciano, Natasha Verdasca
Colatreli, Olavo Pinhatti
Source
International Journal of Evolutionary Biology
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-06-24
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
The neotropical cichlid genus Astronotus currently comprises two valid species: A.
ocellatus Agassiz, 1831 and A.
crassipinnis Heckel, 1840.
The diagnosis is based on color pattern and meristics counts.
However, body color pattern is highly variable between regions and the meristic counts show a considerable overlap between populations differing in color patterning.
They do not represent true synapomorphies that diagnose species.
Purportedly the only truly diagnostic character is the presence or absence of one or more ocelli at the base of the dorsal fin, diagnosing A.
ocellatus and A.
crassipinnis, respectively.
Using the 5′ portion of the mitochondrial COI gene and EPIC nuclear markers, the validity of the dorsal ocelli as diagnostic character was tested in individuals sampled from ten localities in the Amazon basin.
Analyses rejected the hypothesis that dorsal ocelli are diagnostic at the species level.
However, they revealed the existence of five hypothetical, largely allopatrically distributed morphologically cryptic species.
The phylogeographic structure is not necessarily surprising, since species of the genus Astronotus have sedentary and territorial habits with low dispersal potential.
The distribution of these hypothetical species is coincident with patterns observed in other Amazonian aquatic fauna, suggesting the role of common historical processes in generating current biodiversity patterns.
American Psychological Association (APA)
Colatreli, Olavo Pinhatti& Meliciano, Natasha Verdasca& Toffoli, Daniel& Farias, Izeni Pires& Hrbek, Tomas. 2012. Deep Phylogenetic Divergence and Lack of Taxonomic Concordance in Species of Astronotus (Cichlidae). International Journal of Evolutionary Biology،Vol. 2012, no. 2012, pp.1-8.
https://search.emarefa.net/detail/BIM-507754
Modern Language Association (MLA)
Colatreli, Olavo Pinhatti…[et al.]. Deep Phylogenetic Divergence and Lack of Taxonomic Concordance in Species of Astronotus (Cichlidae). International Journal of Evolutionary Biology No. 2012 (2012), pp.1-8.
https://search.emarefa.net/detail/BIM-507754
American Medical Association (AMA)
Colatreli, Olavo Pinhatti& Meliciano, Natasha Verdasca& Toffoli, Daniel& Farias, Izeni Pires& Hrbek, Tomas. Deep Phylogenetic Divergence and Lack of Taxonomic Concordance in Species of Astronotus (Cichlidae). International Journal of Evolutionary Biology. 2012. Vol. 2012, no. 2012, pp.1-8.
https://search.emarefa.net/detail/BIM-507754
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-507754