Title
Phylogenetic interrelationships, taxonomy, and reductive evolution in the Neotropical electric fish genus Hypopygus (Teleostei, Ostariophysi, Gymnotiformes)
Abbreviated Journal Title
Zool. J. Linn. Soc.
Keywords
Amazon basin; Hypopomidae; miniaturization; Neotropics; Stegostenopos; FRESH-WATER FISHES; SEQUENCE DATA; MINIATURIZATION; CHARACIFORMES; CLASSIFICATION; COMMUNICATION; PAEDOCYPRIS; DISCHARGES; MORPHOLOGY; OSTEOLOGY; Zoology
Abstract
A phylogenetic reconstruction of the Neotropical electric fish genus Hypopygus based on 47 parsimony-informative morphological characters is presented. A series of synapomorphies support the hypothesis of monophyly of Hypopygus, and partially resolve species-level relationships within the genus. Hypopygus species are recognized here as miniaturized fishes based on two criteria; first, a derived condition of diminutive body size, and; second, the presence of a suite of reductive morphological characters, including partial or total losses, simplifications, and reductions of the anal-fin rays, scales, cranial bones, and laterosensory canal system. Reductive characters associated with miniaturization comprise 45% of the total number of characters in the phylogenetic reconstruction of the genus. Miniaturization and reductive morphological evolution in Hypopygus are discussed here in the phylogenetic context. A taxonomic revision of Hypopygus is presented, in which five new species are described, two species previously assigned to the genus are redescribed, and a single known species of Stegostenopos is redescribed and included in Hypopygus as a junior synonym. Distribution maps and a key for all eight valid species of Hypopygus are provided, based on the examination of 5014 catalogued museum specimens. (C) 2011 The Linnean Society of London, Zoological Journal of the Linnean Society, 2011, 163, 1096-1156. doi: 10.1111/j.1096-3642.2011.00736.
Journal Title
Zoological Journal of the Linnean Society
Volume
163
Issue/Number
4
Publication Date
1-1-2011
Document Type
Article
Language
English
First Page
1096
Last Page
1156
WOS Identifier
ISSN
0024-4082
Recommended Citation
"Phylogenetic interrelationships, taxonomy, and reductive evolution in the Neotropical electric fish genus Hypopygus (Teleostei, Ostariophysi, Gymnotiformes)" (2011). Faculty Bibliography 2010s. 1237.
https://stars.library.ucf.edu/facultybib2010/1237
Comments
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