Australian Museum Journal Two new species of roughy (Trachichthyidae: Optivus) from coastal waters of southern Australia

Shortform:
Gomon, 2004, Rec. Aust. Mus. 56(2): 173–178
Author(s):
Gomon, Martin F.
Year published:
2004
Title:
Two new species of roughy (Trachichthyidae: Optivus) from coastal waters of southern Australia
Serial title:
Records of the Australian Museum
Volume:
56
Issue:
2
Start page:
173
End page:
178
DOI:
10.3853/j.0067-1975.56.2004.1419
Language:
English
Date published:
07 July 2004
Cover date:
07 July 2004
ISSN:
0067-1975
CODEN:
RAUMAJ
Publisher:
The Australian Museum
Place published:
Sydney, Australia
Digitized:
07 July 2004
Available online:
07 July 2004
Reference number:
1419
EndNote package:
EndNote file
Title page:
Title page (11kb PDF)
Complete work:
Complete work (160kb PDF)

Abstract

Names are provided for two allopatric species of Optivus occurring in shelf waters of southeastern and southwestern Australia that have been treated in recent Australian literature. Optivus agastos n.sp., distributed from southern Queensland to central Victoria and northeastern Tasmania, and at Lord Howe Island, differs from the very similar O. elongatus, which is limited to New Zealand, in having fewer gill rakers (22-24, rarely 25, versus 25-27, rarely 24), slightly smaller eye, longer snout, and enlarged teeth along the inner margin of the premaxilla. Optivus agrammus n.sp., distributed from western South Australia to southwestern Western Australia, can be distinguished from congeners most readily by the lack of stripes on its caudal-fin lobes, curved dorsal outline of its nape and head in lateral profile, relatively deeper and shorter caudal peduncle, and lower dorsal and anal fins.

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