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Asymbolus pallidus, Pale spotted catshark
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Pale spotted catshark
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drawing shows typical species in Pentanchidae.
Elasmobranchii (sharks and rays) >
Carcharhiniformes
(Ground sharks) >
Pentanchidae
(Deepwater catsharks)
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
Ecology
Marine; bathypelagic; depth range 225 - 402 m (Ref.
36718
). Deep-water
Western Pacific: Queensland, Australia.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 43.9 cm TL male/unsexed; (Ref.
36718
); 46.7 cm TL (female)
Short description
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
).
Oviparous (Ref.
50449
).
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.
130435
)
Least Concern (LC)
; Date assessed:
20 February 2015
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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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
): PD
50
= 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00355 (0.00176 - 0.00714), b=3.09 (2.91 - 3.27), 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).
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- 20 July 2016
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