Elasmobranchii (sharks and rays) > Carcharhiniformes
(Ground sharks) > Pentanchidae
Etymology: Asymbolus: Etymology not explained, possibly a-, Latin privative, i.e., without; sym-, from syn (Gr.), together or joined; bolus (L.), lump or morsel, proposed as a subgenus of Scyliorhinus (Scyliorhinidae) distinguished in part by labial fold of upper lip not hanging over lower-jaw symphysis of A. analis and A. vincenti. (See ETYFish); pallidus: Latin for ashen or wan, referring to its wan body color, distinctively paler than congeners. (See ETYFish).
More on authors: Last, Gomon & Gledhill.
Environment: milieu / climate zone / depth range / distribution range
Marine; bathypelagic; depth range 225 - 402 m (Ref. 36718). Deep-water
Western Pacific: Queensland, Australia.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 43.9 cm TL male/unsexed; (Ref. 36718); 46.7 cm TL (female)
Morphology | Morphometrics
Body small, spotted, very pale covered with widely-spaced, sharply-defined dark brown spots; dark spots or blotches beneath the eye absent; head and preoral length relatively long. Caudal peduncle slender, dorsal, anal and pelvic fins low; anal-fin base equal to or shorter than pelvic-anal space. Teeth ridged, 5 cusps. Monospondylous centra 34-36. Posterior margin of first dorsal fin 0.59-0.69 times its base (Ref. 36718).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).
Last, P.R., M.F. Gomon and D.C. Gledhill, 1999. Australian spotted catsharks of the genus Asymbolus (Carcharhiniformes: Scyliorhinidae). Part 2: Descriptions of three new, dark-spotted species. p. 19-35. In P.R. Last (ed.). Australian catsharks of the genus Asymbolus (Carcharhiniformes: Scyliorhinidae). (Ref. 36718)
IUCN Red List Status (Ref. 126983)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 123201
): 8.9 - 18.9, mean 14.2 °C (based on 24 cells).
Phylogenetic diversity index (Ref. 82804
= 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00355 (0.00173 - 0.00727), b=3.08 (2.90 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 4.0 ±0.6 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
): Moderate vulnerability (37 of 100).