Classificatie / Names
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Kurtiformes (Nurseryfishes, cardinalfishes.) >
Apogonidae (Cardinalfishes) > Pseudamiinae
Etymology: Gymnapogon: Greek, gymnos = naked + Greek, pogon = beard (Ref. 45335); janus: Named after Janus, the Roman god of gates and doors, represented by two faces, referring to the rounded caudal fin when scales have been sloughed off for some specimens of Pseudamia but with internal characters and preopercle spine of Gymnapogon.
Eponymy: Janus was a Roman God of beginnings and endings, usually depicted as having two faces. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ecologie
marien benthopelagisch; diepte 0 - 38 m (Ref. 107874). Tropical
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Western Central Pacific: Philippines.
Grootte / Gewicht / Leeftijd
Maturity: Lm ?  range ? - ? cm
Max length : 6.3 cm SL mannelijk / geslacht onbekend; (Ref. 107874)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale stekels (totaal) : 7; Dorsale zachte stralen (totaal) : 10; Anale stekels: 2; Anale zachte stralen: 9 - 10; Wervels: 24. This species is distinguished by the following characters: A 9-10 with anterior-most ray unbranched; D 10, the two anterior-most rays unbranched; pectoral fins 14, 9 branched and 5 unbranched; caudal fin rounded, principal caudal rays 17. 15 branched; vomer with one row of two villiform teeth on each side (Ref. 107874).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Fraser, T.H., 2016. A new species of cardinalfish (Gymnapogon, Gymnapogonini, Apogonidae, Percomorpha) from Philippines. Zootaxa 4107(3):431-438. (Ref. 107874)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2024-2)
Gevaar voor de mens
Harmless
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.4 ±0.5 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).