Acroteriobatus Giltay, 1928

Last, Peter R., Séret, Bernard & Naylor, Gavin 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), pp. 451-475 : 465

Genus Acroteriobatus Giltay, 1928

Type species. Rhinobatus ( Syrrhina) annulatus Müller & Henle, 1841 (by subsequent designation). Elevated herein to genus rank from subgenus.

Description. Nostril distinctly longer than internasal distance; posterior aperture narrow, elongate, slightly oblique to anterior aperture. Anterior nasal flaps weakly bilobed, not fused to form a nasal curtain, very long based, inserted on snout well anterior (flaps almost joined) and well inward of innermost corner of posterior aperture; anterior aperture medium sized, suboval to subcircular, medial edge partly formed by long lobe-like extension of anterior nasal flap; inner part of anterior nasal flap relatively long with an almost horizontal, undulate margin; lateral and posterior margins of anterior aperture bordered by broad posterolateral nasal flap, extending posteromedially as free flap but tip falling well short on inner corner of nostril; posterior nasal flap very well developed, much broader than posterolateral nasal flap and base exceeding half nostril length Lower jaw horizontal; skin margin forming upper lip straight; single lateral groove at its angle; oral groove moderate, extending from beside jaws around chin.

Species. A. annulatus (Müller & Henle, 1841) , A. blochii (Müller & Henle, 1841) , A. leucospilus ( Norman, 1926) , A. ocellatus ( Norman, 1926) , A. salalah (Randall & Compagno, 1995) , A. variegatus (Nair & Lal Mohan, 1973) , A. zanzibarensis ( Norman, 1926) .