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Ovalentaria/misc (Various families in series Ovalentaria) >
Opistognathidae (Jawfishes)
Etymology: Opistognathus: Greek, opisthe = behind + Greek, gnathos = jaw (Ref. 45335); to the very elongate upper jaw of the type species of the genus, Opistognathus nigromarginatus (Ref. 128653); ctenion: Name 'ctenion' from the Greek diminutive meaning 'small comb', in reference to the low gill raker numbers in the new species, one of the lowest recorded for Indo-Pacific species of
Opistognathus.
環境：環境 / 気候帯 / 深さの範囲 / 分布範囲
生態学
海 底生の; 深さの範囲 35 - 37 m (Ref. 129318). Subtropical
Northwest Pacific: Japan.
サイズ / 重さ / 年齢
成熟: Lm ? range ? - ? cm
Max length : 3.1 cm SL オス/雌雄の選別がない; (Ref. 129318)
簡単な記述
検索表 | 形態学 | 形態計測学
背面の脊椎 (合計) : 11; 背鰭 (合計) : 16; 肛門の骨: 2; 臀鰭: 17; 脊つい: 32. This species is distinguished from its congeners by the following set of characters: posterior end of upper jaw rigid, without flexible lamina; D XI, 16-18; anterior dorsal-fin spines very stout and straight, and their distal ends not transversely forked; A II, 17; gill rakers 6 or 7 + 13 or 14 = 20 or 21; vertebrae 10 + 22 = 32; longitudinal scale rows c. 40-50; lateral line terminating below 4th-6th soft ray of dorsal fin; 4th and 5th mandibular pore positions usually included 2 and 6-7 pores, respectively; absence of body scales anterior to vertical below 4th or 5th dorsal-fin spine; vomerine teeth 2; body reddish-brown with 3 or 4 longitudinal rows of c. 8-10 whitish blotches; cheek and opercle with 5 or 6 whitish blotches; snout, suborbital region, and both jaws without blotches or stripes; spinous dorsal fin with ocellus between 2nd to 5th spines; dorsal-fin soft-rayed portion with two reddish-orange stripes; pectoral-fin base with 1 or 2 whitish blotches; and caudal fin uniformly faint orange or reddish-yellow (Ref. 129318).
Body shape (shape guide): elongated; Cross section: compressed.
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Fujiwara, K., H. Motomura and G. Shinohara, 2023. Opistognathus ctenion (Perciformes, Opistognathidae): a new jawfish from southern Japan. ZooKeys 1179:353-364. (Ref. 129318)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
人間の用途
水産業: 興味がない
用具
特記事項
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インターネットの情報源
モデルに基づく推定値
系統多様性指数 (参照
82804): PD
50 = 0.5000 [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).
栄養段階 (参照
69278): 3.2 ±0.5 se; based on size and trophs of closest relatives
漁業の脆弱性 (Ref.
59153): Low vulnerability (10 of 100).
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