Open AccessComparative osteology of the Danio (Cyprinidae: Ostariophysi) axial skeleton with comments on Danio relationships based on molecules and morphology
Author(s) -
SANGER THOMAS J.,
McCUNE AMY R.
Publication year - 2002
Publication title -
zoological journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.148
H-Index - 83
eISSN - 1096-3642
pISSN - 0024-4082
DOI - 10.1046/j.1096-3642.2002.00014.x
Subject(s) - danio , biology , monophyly , phylogenetic tree , zoology , osteology , evolutionary biology , axial skeleton , cyprinidae , vertebrate , systematics , zebrafish , anatomy , taxonomy (biology) , clade , genetics , fishery , gene , fish <actinopterygii>
Daniois a diverse group of small, colourful and easily bred freshwater fishes native to Southern Asia. Biological interest in danios has increased in recent years because the zebrafish,Danio rerio, has become an important model organism, particularly for studies of vertebrate developmental biology and genetics. Though several phylogenetic studies ofDaniohave been done on a subset ofDaniospecies, the resulting phylogenies conflict in detail. To examine the utility of osteology for systematics of this group at the species level, we studied the axial skeleton for 11 species ofDanio.We analyse our morphological data alone and combined with DNA sequence data for five gene sequences generated in earlier phylogenetic studies. The axial skeleton ofDanioexhibits 14 characters that prove useful in phylogenetic analysis. Both molecular and morphological data support the monophyly of the danios included in our analysis and both data sets support the monophyly of two subclades: a deep‐bodied group and a slender‐bodied group. Separate analysis of molecular and morphological data sets show that the molecular data resolves relationships within the slender subclade whereas the topology of the deep‐bodied subclade is determined by morphological data. © 2002 The Linnean Society of London.Zoological Journal of the Linnean Society, 2002,135 , 529–546.