Elasmobranchii (sharks and rays) > Rajiformes
(Skates and rays) > Arhynchobatidae
Etymology: Bathyraja: Greek, bathys = deep + Latin, raja, -ae = a ray (Raja sp) (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Marine; bathydemersal; depth range 243 - 1207 m (Ref. 127873). Deep-water; 6°S - 7°S
Southeast Pacific: Ecuador and Peru to southern Chile.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 110 cm TL male/unsexed; (Ref. 127873)
Morphology | Morphometrics
This species is distinguished by the following characters: the pectoral fin apices narrowly or abruptly rounded; the preorbital length times orbital length 2.41-3.40; preorbital length times interorbital length 1.02-1.17; interorbital space times orbit length 1.02-1.26; orbital length times spiracle length 1.16-1.78; pre-oral length times internarial length 1.24-1.34 (> 97.0 cm TL); tail thorns evenly spaced; dorsal disc surface and tail with finely textured denticles; teeth arranged in quincunx; predorsal tail vertebrae 64-71; pectoral-fin radial count 77-82 (Ref. 127873).
Holotype taken from a depth of 980 m (Ref. 26282). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).
McEachran, J.D. and K.A. Dunn, 1998. Phylogenetic analysis of skates, a morphologically conservative clade of elasmobranchs (Chondrichthyes: Rajidae). Copeia 1998(2):271-290. (Ref. 27314)
IUCN Red List Status (Ref. 126983)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82804
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00513 (0.00253 - 0.01042), b=3.12 (2.95 - 3.29), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245
Trophic level (Ref. 69278
): 4.0 ±0.7 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).
Fishing Vulnerability (Ref. 59153
): High to very high vulnerability (66 of 100).