Psammobatis bergi

Common Name

Blotched Sandskate

Year Described

Marini, 1932


Median thorns: no obvious center thorn row

Disk round with broad, rounded pectoral fins and a weakly concave anterior margin of disk (strongly concave in males). Snout short and soft with slightly convex lateral edges. Conical snout tip slightly projects and sometimes has a filamentous tip. Skin rough; and more so anteriorly and along the back. Ventrum quite smooth. Multiple orbital thorns in a crescent shape around each orbit. Patches of scapular thorns. A few nuchal thorns on midline. Several irregular rows of thorns on midline running onto tail. Tail thick and a bit longer than disk, with several rows of thorns. Caudal fin rudimentary. Dorsal fins are paired far back on tail, very close together, and very small. Pelvic fins in two lobes with a distinct notch. Claspers large. Mouth narrow. Nasal flaps broad with fringes. Teeth are conical and sharp (39-46 in upper jaw).


The only member of the genus with a complex pattern of light spots, reticulations and blotches over a dark brown background. Tail banded in light and dark. Ventrum white.


Maximum size to 61cm TL.


Coastal waters from 10-80m. Benthic.


Southwestern Atlantic: S. Brazil to N. 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

The only Psammobatis that is dark brown with light markings. All others are pale to medium brown with faint darker or no markings. The nearly round shape and rough disk separates it from Sympterygia bonapartii. Species of the genus Bathyraja differ in snout morphology and usually occur at much greater depths.