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Rhynchactis macrothrix
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Rhynchactis macrothrix
Picture by
Ho, H.-C.
Teleostei (teleosts) >
Lophiiformes
(Anglerfishes) >
Gigantactinidae
(Whipnose anglers)
Etymology:
Rhynchactis:
Greek, 'rhynch' = beak or snout + Greek, 'aktis' = ray (in reference to the illicium that arises near the tip of the snout) (Ref.
86949
)
;
macrothrix:
Specific name refers to the relatively long secondary filaments of the illicium.
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathypelagic; depth range 300 - 2000 m (Ref.
86949
). Deep-water
Atlantic and Western Indian Ocean (Ref.
28611
). Reported from western Pacific in Taiwan (Ref.
122006
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 15.2 cm SL (female)
Short description
Morphology
|
Morphometrics
Dorsal
soft rays
(total): 4;
Anal
soft rays
: 3. Length of illicium 109-144% SL, distal tip bearing 3-4 small unpigmented filaments, some with tiny distal swelling; distal 28-57% illicial length bearing series of 11-20 secondary filaments, five longest filaments measuring 6-15%SL; each secondary filament with 1-2 unpigmented terminal filaments, some with tiny distal swelling; large specimens (110-113 mm) with secondary filaments darkly pigmented to base of terminal filaments, divided on each side by a narrow, well-defined longitudinal transparent band (Ref.
86949
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Bertelsen, E. and T.W. Pietsch
, 1998. Revision of the deepsea anglerfish genus
Rhynchactis
Regan (Lophiiformes: Gigantactinidae), with descriptions of two new species. Copeia 1998(3):583-590. (Ref.
28611
)
IUCN Red List Status (Ref.
130435
)
Data deficient (DD)
; Date assessed:
08 July 2014
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201
): 2 - 9, mean 6.1 °C (based on 368 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01995 (0.00906 - 0.04395), b=3.01 (2.83 - 3.19), in cm total length, based on all LWR estimates for this body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.9 ±0.7 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153
): Low vulnerability (10 of 100).
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mrius-barile
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