Elasmobranchii (sharks and rays) >
Rajiformes (Skates and rays) >
Arhynchobatidae (Softnose skates)
Etymology: Bathyraja: Greek, bathys = deep + Latin, raja, -ae = a ray (Raja sp) (Ref. 45335); caeluronigricans: Named for the purplish black color of the dorsal side of the disk (Ref. 75535).
Issue
This species is a synonym of Bathyraja matsubarai (Ishiyama, 1952) after Last et al. (2016: Ref. 113540)
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; depth range 200 - 400 m (Ref. 58018). Temperate
Northwest Pacific: north of Tôhoku, Japan to the Sea of Okhotsk.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 74.4 cm WD male/unsexed; (Ref. 75535); 72.2 cm WD (female)
Short description
Identification keys | Morphology | Morphometrics
This species is distinguished from its congeners in Bathyraja in having a dark purplish brown color on both sides of the body; the spiracle is longer than eyeball and with deep concavity at their anterior part; clasper with a deep cleft; dense silky fibers cover the egg capsule (Ref. 75535).
Body shape (shape guide): other.
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. 130435: Version 2025-2)
Threat to humans
Harmless
Human uses
Tools
Special reports
Download XML
Internet sources
