Psammobatis scobina

Common Name

Raspthorn Sandskate

Year Described

Philippi, 1857


Disk heart-shaped with broad, rounded pectoral fins and a weakly concave anterior margin of disk (more concave in males). Snout short and soft with convex lateral edges. Conical snout tip slightly projects and sometimes has a filamentous tip. Skin with sparse denticles in juveniles but becomes smooth with age.. Ventrum quite smooth. Multiple orbital thorns in a crescent shape around each orbit. No scapular thorn patch but a single thorn usually present. There are a few nuchal thorns on midline. There are several rows of weak thorns running from mid-back to dorsal fin (median row weak with no groove and beginning at pelvic origin). Tail rather slender and slightly longer than disk length, with 1 median and 2-4 lateral rows of thorns. Caudal fin weakly developed. Dorsal fins are paired far back on tail, very close together, and very small. Pelvic fin with two portions separated with a deep notch. Claspers large. Mouth narrow. Nasal flaps broad with fringes. Teeth are conical and sharp (33-47 in upper jaw).


Uniformly dark brown with indistinct pale and dark spots but no obvious pattern. Belly pale.


Maximum size to 50cm TL.


Coastal waters to deeper slopes (30-450m).


Well known from coastal Chile but possibly occurs in and around the Strait of Magellan and S. Argentina.


Last, P.R., White, W.T., Carvalho, M.R. de, Séret, B., Stehmann, M.F.W & Naylor, G.J.P (Eds.). 2016. Rays of the World. CSIRO Publishing, Melbourne.

Other Notes

Occurrence of this species in Atlantic Patagonia is suspected but not confirmed. This is much smoother than Psammobatis rudis.