Journal Article
Anatomy and phylogenetic analysis of the neotropical callichthyid catfishes (Ostariophysi, Siluriformes)
Reis, R.E.
Record Number:
5440
Year:
1998
Journal:
Zoological Journal of the Linnean Society
Pages:
105-168
Volume:
124
Notes:
Article ID: zj970127
Abstract:
Based mainly on morphological characters, the phylogenetic relationships among genera and
some species groups of the neotropical family Callichthyidae were examined. A study of
the osteology of a generalized callichthyid, Callichthys callichthys (Linnaeus), with detailed
comparisons among representatives of the remaining genera in the family, is presented and
used as a basis for the phylogenetic analysis. A single most parsimonious tree supported the
monophyly of the family Callichthyidae based on 28 derived features and the division of the
family in the subfamilies Corydoradinae and Callichthyinae. In the subfamily Corydoradinae,
the genus Aspidoras is the sister-group of the clade formed by Corydoras plus Brochis. Five
derived features support the monophyly of this clade and four support the monophyly of
Brochis. No characters, however, were found to support the genus Corydoras. In the subfamily
Callichthyinae, Dianema and Hoplosternum are sister-taxa. Megalechis represents the sister-group
of Dianema plus Hoplosternum and Lepthoplosternum represents the sister-group to Megalechis plus
Dianema plus Hoplosternum. Finally, Callichthys is considered the least derived member of the
subfamily, and is hypothesized as the sister-group of the remaining species. A key to all
callichthyid genera is provided.
Times Cited:
2