| Bathyraja longicauda (de Buen, 1959) Slimtail skate | 
| Family: | Arhynchobatidae (Softnose skates) | |||
| Max. size: | 80 cm TL (female) | |||
| Environment: | demersal; marine; depth range 400 - 735 m | |||
| Distribution: | Southeast Pacific: northern Peru to central Chile. | |||
| Diagnosis: | This species is distinguished by having the anterior disc margin distinctly undulating; pectoral-fin apices narrowly or abruptly rounded; preorbital length times orbital length 2.00-2.68; preorbital length times interorbital length 1.02-1.30; interorbital space times orbit length 1.20–-1.50; orbital length times spiracle length 2.00-2.53; with a median row of thorns originating from the posterior half of the disc; number of median thorns 26-30; interdorsal thorns 1 or 2; the dorsal disc surface and tail with finely textured denticles on adults confined to a narrow median band originating just posterior to mid-disc and extending along the tail; teeth arranged in quincunx; predorsal tail vertebrae 62; total predorsal vertebrae 93; pectoral-fin radial count 72. Colouration: uniformly colored on their dorsal and ventral surfaces, no blotches, spots, or other distinctive patterns which is consistent at all sizes from young to adult (Ref. 127873). | |||
| Biology: | Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205). | |||
| IUCN Red List Status: | Least Concern (LC); Date assessed: 07 February 2019 Ref. (130435) | |||
| Threat to humans: | harmless | |||