Description of a new species of rabbitfish (Perciformes: Siganidae) from southern India, Sri Lanka and the Maldives

Title
Description of a new species of rabbitfish (Perciformes: Siganidae) from southern India, Sri Lanka and the Maldives
Publication Date
2014
Author(s)
Woodland, David J
Anderson, R Charles
Type of document
Journal Article
Language
en
Entity Type
Publication
Publisher
Magnolia Press
Place of publication
New Zealand
DOI
10.11646/zootaxa.3811.1.8
UNE publication id
une:20609
Abstract
'Siganus insomnis' sp. nov. is described from the Maldives, Sri Lanka and southern India. It most closely resembles 'S. lineatus' (Valenciennes) from the Western Pacific but differs in coloration, principally in that most if not all of the bronze bands on its mid and upper sides continue horizontally and unbroken through to the nape and opercular slit. By contrast, in 'S. lineatus', typically the anterior area below the spinous dorsal fin down to the mid-sides is irregularly marked with golden bronze spots, commas, or a maze of contorted lines. 'S. guttatus' (Bloch) is the third member of this group of sibling species; its sides are covered with orange to bronze-gold spots. It is distributed throughout S.E. Asia, i.e., it occupies a geographic position between the areas inhabited by 'S. lineatus' and 'S. insomnis'. Thus the gene pools of 'S. lineatus' and 'S. insomnis' are quarantined from one another by distance and the intervening presence of 'S. guttatus' in S.E. Asia. The geographical separation of the populations of 'S. lineatus' and 'S. insomnis' from one another is reinforced by the absence of suitable, coralline habitats for these species in the western half of the Bay of Bengal.
Link
Citation
Zootaxa, 3811(1), p. 129-136
ISSN
1175-5334
1175-5326
Start page
129
End page
136

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