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Pleuronectiformes (Flatfishes) >
Cynoglossidae (Tonguefishes) > Symphurinae
Etymology: Symphurus: Greek, syn, symphysis = grown together + Greek, oura = tail (Ref. 45335); longirostris: Name from Latin 'long' for long and 'rostris' for snout; referring to the relatively long snout (especially when compared with S. microrhynchus.).
Environment: milieu / Klimaatzone / Diepte / distribution range
Ecologie
marien demersaal; diepte 45 - 100 m (Ref. 109580), usually 60 - 90 m (Ref. 109580). Subtropical
Northwestern Pacific: Japan.
Lengte bij maturiteit / Grootte / Gewicht / Leeftijd
Maturiteit: Lm ?, range 4 - 6.55 cm
Max length : 6.2 cm SL mannelijk / geslacht onbekend; (Ref. 109580); 6.6 cm SL (female)
Dorsale zachte stralen (totaal) : 81 - 88; Anale zachte stralen: 68 - 74; Wervels: 45 - 48. This species is distinguished from all its congeners by the following set of characters: ID pattern1-2-2-2-2; caudal-fin rays 12; vertebrae, abdominal 9 and total 45-48; hypurals 4; D 81-88; A 68-74; ongitudinal scale rows 56-66; transverse scales 21-26; scale rows on the head posterior to the lower orbit 11-14; with a well-developed fleshy ridge on the posterior ocular side lower jaw; upper and lower eyes covered with a membrane; a membranous flap contiguous from anterior nostril to anteroventral margin of lower eye;
upper head lobe wider than the lower head lobe; differs friom S. microrhynchus and S. holothuriae, by having a shorter head and postorbital lengths, longer snout and predorsal lengths, a different snout shape, and with the anterior margin of the upper eye equal to, or slightly in advance of, that of the lower eye. Colouraton: ocular-side uniformly yellow to light brown; blind-side uniformly white without pepper dots; distinct dermal spots on both sides of the bases of the dorsal and anal fins; peritoneum bluish black on its dorsalmost aspect (Ref. 109580).
Cross section: flattened.
Occurs on continental shelf, collected on muddy substrata or a mixture of mud and sand. Caught by bottom trawls (Ref. 109580).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Lee, M.-Y., T.A. Munroe and Y. Kai, 2017. Description of a new cryptic species of tonguefish (Pleuronectiformes: Cynoglossidae: Symphurus) from shallow waters off Japan. Ichthyol. Res.64:71-83. (Ref. 109580)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-1)
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: bycatch
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00190 - 0.00797), b=3.17 (3.00 - 3.34), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.2 ±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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