Genus Trygonorrhina


Summary:
An endemic Australian genus with two species. Features include: 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: Bray, D.J.2017

Cite this page as:
Bray, D.J.2017, Trygonorrhina in Fishes of Australia, accessed 22 Apr 2018, http://fishesofaustralia.net.au/home/genus/1555

References


Last, P.R. & Séret, B.. 2016. 12 Banjo Rays Family Trygonorrhinidae (pp. 117-126), in Last, P.R., White, W.T., de Carvalho, M.R., Séret, B., Stehmann, M.F.W. & Naylor, G.J.P. (eds) Rays of the World. Melbourne : CSIRO Publishing, 800 pp.