Holocephali (chimaeras) > Chimaeriformes
(Chimaeras) > Chimaeridae
(Shortnose chimaeras or ratfishes)
Etymology: Chimaera: Named for the mythological creature composed of parts of multiple animals, referring to their odd mix of characteristics. (See ETYFish); argiloba: argos (Gr.), white; lobos (Gr.), rounded projection, referring to distinct white posterior margin of first dorsal fin. (See ETYFish).
More on authors: Last, White & Pogonoski.
Environment: milieu / climate zone / depth range / distribution range
Marine; bathydemersal; depth range 370 - 520 m (Ref. 76966). Deep-water; 18°S - 29°S, 113°E - 119°E (Ref. 76966)
Eastern Indian Ocean: off Northwest Australia. Questionably off Indonesia and New Caledonia.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 91.2 cm TL male/unsexed; (Ref. 76966); 87.7 cm TL (female)
Morphology | Morphometrics
This species is distinguished from its congeners by the following characters: snout moderately long; skin relatively thick, non-deciduous; color uniformly silvery greyish dorsally and laterally, paler ventrally; preopercular and oral lateral line canals usually not sharing a common branch; long dorsal spine, longer than first dorsal fin; structure of the CO1 gene (Ref. 76966).
Caught over the upper continental slope (Ref. 76966).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Last, P.R., W.T. White and J.J. Pogonoski, 2008. Chimaera argiloba sp. nov., a new species of chimaerid (Chimaeriformes: Chimaeridae) from Northern Australia. In Last, P.R., White, W.T. & Pogonoski, J.J. (eds.): Descriptions of New Australian Chondrichthyans. CSIRO Marine and Atmospheric Research Paper no. 22. (Ref. 76966)
IUCN Red List Status (Ref. 125652)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 123201
): 4.3 - 12.8, mean 6.6 °C (based on 14 cells).
Phylogenetic diversity index (Ref. 82804
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00309 (0.00126 - 0.00759), b=3.10 (2.89 - 3.31), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.7 ±0.6 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (Deepwater species with few large eggs.).
Fishing Vulnerability (Ref. 59153
): High vulnerability (56 of 100).