Platyrhinoidis triseriata (Jordan & Gilbert, 1880)
Thornback guitarfish
Platyrhinoidis triseriata
photo by Gotshall, D.W.

 Family:  Rhinobatidae (Guitarfishes), subfamily: Platyrhininae
 Max. size:  91 cm TL (male/unsexed)
 Environment:  demersal; depth range 0 - 137 m
 Distribution:  Eastern Pacific: San Francisco, USA to Baja California, Mexico.
 Biology:  Inhabits fine sand to mud bottom, often near kelp beds and sometimes abundant on mud flats of coastal bays. Often buries itself in bottom sediments. Ranges from the intertidal zone to 50 m depth (Ref. 12951). Solitary or in small groups (Ref. 12951). Feeds on small sand-dwelling crustaceans, worms and mollusks. Ovoviviparous (Ref. 50449), with 1 to 15 pups in a litter (Ref. 48844). Possesses ampullary electroreceptors with a region of maximum sensitivity of 5-15 Hz (Ref. 10011).
 IUCN Red List Status:   (Ref. 96402)
 Threat to humans:  harmless
 Country info:   

 Entered by: Froese, Rainer - 01.05.91
 Modified by: Valdestamon, Roxanne Rei - 20.08.14
 Checked by: Froese, Rainer - 02.06.95

Source and more info: For personal, classroom, and other internal use only. Not for publication.

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