Taxonomic Studies of the Eucinostomus argenteus Complex (Pisces: Gerreidae): Preliminary Studies of External Morphology

The external morphologies of members of the Eucinostomus argenteus complex from one locality and in one restricted size range are compared in order to test the hypothesis that this complex is composed of three species and to redefine each species. Both multivariate and univariate comparisons indicat...

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Bibliographic Details
Published in:Copeia 1984-12, Vol.1984 (4), p.893-902
Main Authors: Matheson, Richard E., McEachran, John D.
Format: Article
Language:English
Subjects:
Agnatha. Pisces
Biological and medical sciences
Biological taxonomies
Eucinostomus argenteus
Evolution
Freshwater fishes
Fundamental and applied biological sciences. Psychology
Jaw
Marine
Marine fishes
Peduncle
Pigmentation
Speciation
Species
Specimens
Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution
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Summary:The external morphologies of members of the Eucinostomus argenteus complex from one locality and in one restricted size range are compared in order to test the hypothesis that this complex is composed of three species and to redefine each species. Both multivariate and univariate comparisons indicate four distinct morphotypes within this complex. Hypotheses that could explain these findings are discussed, and four species are accepted. Preliminary diagnoses of each species are presented, and a possible speciation mechanism is discussed.
ISSN:0045-8511
1938-5110
DOI:10.2307/1445334