Genus Aptychotrema

An endemic Australian genus with at least 3 species. Features - snout acutely pointed, underside without internasal flap, but with deep preoral groove; nostrils mostly transverse, width of each about equal to or less than internasal distance; mouth strongly curved anteriorly; spiracles lacking distinct skin folds.
Author: Bray, D.J.2017

Cite this page as:
Bray, D.J.2017, Aptychotrema in Fishes of Australia, accessed 10 Dec 2023,


Last, P.R., Séret, B. & Naylor, G.J.P. 2016. A new species of guitarfish, Rhinobatos borneensis sp. nov. with a redefinition of the family-level classification in the order Rhinopristiformes (Chondrichthyes: Batoidea). Zootaxa 4117(4): 451-475 DOI: Abstract

Séret, B., Last, P.R. & Naylor, G.J.P. 2016. 10. Guitarfishes. Family Rhinobatidae, pp 77-109; 11. Giant Guitarfishes. Family Glaucostegidae, pp 110-116. In: Last, P.R., White, W.T., Carvalho, M.R. de, Séret, B., Stehmann, M.F.W. & Naylor, G.J.P. (eds.) Rays of the World. Clayton South, Victoria : CSIRO Publishing 790 pp.