Elasmobranchii (sharks and rays) > Rajiformes
(Skates and rays) > Rajidae
Etymology: Dactylobatus: Greek, daktyleys, -eos = a kind of grey mullet + Greek, batis = a kind of ray (Ref. 45335).
Environment / Climate / Range
Marine; bathydemersal; depth range 475 - 1000 m (Ref. 28767). Deep-water
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 59.0 cm TL male/unsexed; (Ref. 13608); 69.0 cm WD (female)
Western Central Atlantic: northern Gulf of Mexico (Ref. 13608) and northern coast of South America (Ref. 5217).
Inhabits mud-bottom habitat on the upper slope, generally in waters deeper than 350 meters. Stomach contents include one specimen of Mullus argentinae, remains of a teleost fish and predominance of Myctophidae fishes. Sympatric with other chondrichthyans, Etmopterus bigelowi, Squalus aff. blainvillei, and Dipturus leptocauda (Ref. 56543). 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. 96402)
CITES (Ref. 94142)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00295 (0.00131 - 0.00665), b=3.21 (3.02 - 3.40), based on LWR estimates for this Family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 4.5 ±0.80 se; Based on food items.
Resilience (Ref. 69278
): Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (30 of 100) .