Abstract

The phylogenetic position of the south-western Australian endemic, Lepidogalaxias salamandroides, has been controversial since its description by Mees in 1961. Some workers place this tiny fish with the galaxioids of the southern end of the Southern Hemisphere, one considered it to be an esocoid (a group otherwise restricted to the northern end of the Northern Hemisphere), while another hypothesises that it may be the sister group of the Neoteleostei. My study of the suspensorium and its muscles in associated euteleosts supports the hypothesis that the galaxioids are monophyletic and include Lepidogalaxias. Data from the bones and muscles of the suspensorium suggests the following pattern: ([Retropinnidae + Prototroctidae] + [Lepidogalaxias + (Galaxiidae + Aplochitonidae)]). Lepidogalaxias is the sister group of Galaxiidae + Aplochitonidae based particularly on synapomorphies of the adductor mandibulae. The suspensorium and its muscles in Lepidogalaxias and the other galaxioids are described in detail for the first time. I also critically evaluate competing hypotheses of galaxioid relationships and comment on paedomorphosis in the group.

 
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Bibliographic Data

Short Form
Williams, 1997, Rec. Aust. Mus. 49(2): 139–166
Author
R. R. G. Williams
Year
1997
Title
Bones and muscles of the suspensorium in the galaxioids and Lepidogalaxias salamandroides (Teleostei: Osmeriformes) and their phylogenetic significance
Serial Title
Records of the Australian Museum
Volume
49
Issue
2
Start Page
139
End Page
166
DOI
10.3853/j.0067-1975.49.1997.1263
Language
English
Date Published
15 October 1997
Cover Date
15 October 1997
ISSN
0067-1975
CODEN
RAUMAJ
Publisher
The Australian Museum
Place Published
Sydney, Australia
Subjects
FISHES; TAXONOMY; OSTEOLOGY
Digitized
17 November 2008
Available Online
17 November 2008
Reference Number
1263
EndNote
/Uploads/Journals/17843/1263.enw
Title Page
/Uploads/Journals/17843/1263.pdf
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Complete Work
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