Abstract

The aim of this paper is to document the presence, diversity and distribution of Megalomma in Australia. This could be considered the first valid record of the genus in this continent as the only species previously recorded was transferred to another genus (Knight-Jones, 1997). The species diversity found during this study indicates that the occurrence of Megalomma in Australia has been overlooked, as the genus is well represented with at least seven species, living in a range of habitats and depths, and three of which are herein described as new, M. phyllisae n.sp, M. inflata n.sp. and M. interrupta n.sp. Cladistic analyses have been performed after the generation of a matrix of morphological features including those of some well documented species, in order to find informative characters for grouping species and to test the validity of previous artificial classifications. According to the phylogenetic hypothesis presented herein, the fusion of dorsal collar margins to the faecal groove and the presence of collar "pockets" characterizes the apomorphic clade of Megalomma species but the number of radiolar eyes is a homoplastic character, varying substantially in the Megalomma radiation, meaning that the traditional groups should be reviewed. A dichotomous key is provided to facilitate Australian species identification.

 
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Bibliographic Data

Short Form
Capa and Murray, 2009, Rec. Aust. Mus. 61(2): 201–224
Author
María Capa; Anna Murray
Year
2009
Title
Review of the genus Megalomma (Polychaeta: Sabellidae) in Australia with description of three new species, new records and notes on certain features with phylogenetic implications
Serial Title
Records of the Australian Museum
Volume
61
Issue
2
Start Page
201
End Page
224
DOI
10.3853/j.0067-1975.61.2009.1529
Language
English
Date Published
25 November 2009
Cover Date
25 November 2009
ISSN
0067-1975
CODEN
RAUMAJ
Publisher
The Australian Museum
Place Published
Sydney, Australia
Digitized
25 November 2009
Available Online
25 November 2009
Reference Number
1529
EndNote
/Uploads/Journals/18076/1529.enw
Title Page
/Uploads/Journals/18076/1529.pdf
File size: 42kB
Complete Work
/Uploads/Journals/18076/1529_complete.pdf
File size: 1230kB