Pseudobatos, Last, Peter R., Séret, Bernard & Naylor, Gavin J. P., 2016

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 : 470

Genus Pseudobatos gen. nov.

Type species. Rhinobatus glaucostigma Jordan & Gilbert, 1883 (original designation).

Description. Nostril longer than internasal distance; posterior aperture narrow, very elongate, slightly oblique to anterior aperture. Anterior nasal flaps bilobed, not fused to form a nasal curtain, short based (less than half nostril length, insert on snout beside nostril margin, and well anterior and well lateral to innermost corner of posterior aperture (insertions of flaps very widely separated, by much more than internasal distance); anterior aperture medium sized, elongate oval, medial edge formed by long lobe-like extension of anterior nasal flap; posterior lobe of anterior nasal flap very short-based and narrow with an oblique, almost straight margin; lateral and posterior margins of anterior aperture bordered by very broad posterolateral nasal flap, extending posteromedially as free flap but tip barely reaching beyond middle of posterior aperture of nostril; posterior nasal flap well developed, slightly broader than posterolateral nasal flap, base about half or less of nostril length and well short of innermost corner of nostril. Lower jaw often convex near symphysis; skin margin forming upper lip slightly concave; upper and lower lateral grooves at its angle; oral groove moderate, extending from beside jaws around chin.

Species. P. glaucostigmus ( Jordan & Gilbert, 1883), P. horkelii (Müller & Henle, 1841) , P. lentiginosus ( Garman, 1880) , P. leucorhynchus (Günther, 1867) , P. percellens (Walbaum, 1792) , P. planiceps ( Garman, 1880) , P. prahli (Acero & Franke, 1995) , P. productus (Ayres, 1854) .