Genus Trygonorrhina


Summary:
An endemic Australian genus with 3 species. Features - snout broadly rounded to obtusely pointed, nasal valves on underside united to form internasal flap; nostrils mostly transverse, width much less than internasal distance; mouth nearly straight or only slightly curved anteriorly; spiracles with single enlarged skin fold.

Key to species of Trygonorrhina

1a.  Area on head behind eye without distinctive dark-edged triangular or diamond-shaped marking …………….....……............................................………………….............................…....................…………………….………Trygonorrhina dumerilii (Southern Australia)

1b. Area on head behind eye with distinctive dark-edged triangular or diamond-shaped marking …………………...............................…………….....………......................………..……………….............…………Trygonorrhina fasciata      (South Australia)
Author: Martin F. Gomon

Cite this page as:
Martin F. Gomon, Trygonorrhina in Fishes of Australia, accessed 22 Jul 2017, http://fishesofaustralia.net.au/home/genus/1555