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Pleuronectiformes (Flatfishes) >
Cynoglossidae (Tonguefishes) > Symphurinae
Etymology: Symphurus: Greek, syn, symphysis = grown together + Greek, oura = tail (Ref. 45335); megasomus: Name derived from the Greek, 'mega' for large, and 'somus' for body, referring to the large size of this species and the deep body without obvious tapering in the posterior body.
Environment: milieu / Klimaatzone / Diepte / distribution range
Ecologie
marien benthopelagisch; diepte 200 - 640 m (Ref. 82423). Subtropical
Northwest Pacific: Taiwan.
Lengte bij maturiteit / Grootte / Gewicht / Leeftijd
Maturiteit: Lm 12.3, range 10 - 14.34 cm
Max length : 14.7 cm SL mannelijk / geslacht onbekend; (Ref. 82423); 14.3 cm SL (female)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale zachte stralen (totaal) : 106 - 111; Anale zachte stralen: 91 - 96; Wervels: 55 - 58. This species is distinguished from all its congeners, except S. hondoensis and S. undatus, by its predominant 1-2-3-2-2 ID pattern. It also differs from both abovementioned species in having smaller eye (5.3-7.9% HL vs. 11.0-14.9% HL in S. hondoensis and 11.5-13.8% HL in S. undatus). This species further differs from S. hondoensis
in having 9 abdominal vertebrae (vs. 10). S. megasomus is also distinguished from S. undatus, by having higher fin-ray counts, 106-111 dorsal-fin rays and 91-96 anal-fin rays (vs. 101-105 dorsal-fin rays and 87-91 anal-fin rays) and a uniform straw-colored to dark brown ocular-side coloration (vs. freckled ocular-side pigmentation) (Ref. 82423).
Body shape (shape guide): short and / or deep.
This deep-water tonguefish species is known only from the continental shelf and upper continental slope off northeastern and eastern Taiwan; from 471-640 m by research vessels. Polychaetes, small crustaceans and some unidentified detritus were found in the digestive systems of fishes examined. Little else is known regarding the biology of this species (Ref. 82423).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Lee, M.-Y., H.-M. Chen and K.-T. Shao, 2009. A new species of deep-water tonguefish genus Symphurus (Pleuronectiformes: Cynoglossidae) from Taiwan. Copeia 2009(2):342-347. (Ref. 82423)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-1)
Gevaar voor de mens
Harmless
Gebruik door de mens
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Estimates based on models
Preferred temperature (Ref.
123201): 9.6 - 16.7, mean 12.5 °C (based on 17 cells).
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01072 (0.00507 - 0.02267), b=3.11 (2.92 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.3 ±0.4 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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