Rhinobatos manai White, Last & Naylor, 2016
Papuan guitarfish
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Family:  Rhinobatidae (Guitarfishes)
Max. size:  73.1 cm TL (male/unsexed)
Environment:  pelagic-neritic; marine; depth range 191 - 290 m
Distribution:  Southwest Pacific: Papua New Guinea.
Diagnosis:  This species is distinguished by the following set of characters: a wedge-shaped disc, with its dorsal surface covered in minute dermal denticles but without thorns; long snout, its length 3.6 times interspiracular distance; moderately large orbit, its diameter 1.7 times spiracle length; oblique nostrils, its length 1.6 times internarial distance; the anterior nasal flaps are inserted into internarial space well away from nostril margin; posterior nasal flaps are broad; ridges of rostral cartilage well-separated dorsally and almost parallel; narrow prebranchial sensory-pore patch, extending to first gill slit; distance between first gill slits is 1.5 times distance between fifth gill slits; distance between fifth gill slits is 3.4 times in ventral head length; long postscapular sensory canal, not grooved and extending more than three-quarters distance to pectoral-fin insertions; moderately tall dorsal fins; pelvic fin's inner margin is shorter than its base; interdorsal distance is more than 3.1 times first dorsal-fin base; outer spiracular fold is distinctly larger than the inner fold; dorsal margin of caudal fin ca. 2 times preventral margin; post-synarcual (free) vertebral centra 171; total vertebral centra 180; nasal lamellae 52; dorsal disc is brownish and covered with well defined rusty brown spots and blotches and poorly defined white spots with greyish edges (Ref. 117108).
IUCN Red List Status: Least Concern (LC); Date assessed: 12 May 2020 Ref. (124695)
Threat to humans:  harmless
Country info:   

Entered by: Capuli, Estelita Emily - 19.02.18

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