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板鰓亜鋼(サメとエイ類) (sharks and rays) > Carcharhiniformes (Ground sharks) > Dichichthyidae (Bristle shark)
Etymology: Dichichthys:Name from the combination of the Greek 'dicho'- meaning 'to branch in two' and 'ichthys' for 'fish', with this genus being intermediate between the Galeus-Parmaturus complex and Apristurus; melanobranchus:melanos (Gr.), black; branchos (Gr.), gill, referring to blackish color on gill septa (See ETYFish).
Northwest Pacific: known from only 3 specimens taken in the South China Sea. Collected less than a degree north of the northwestern boundary of the Western Central Pacific (Ref. 11146).
サイズ / 重さ / 年齢
成熟: Lm ?  range ? - ? cm Max length : 85.0 cm TL (female)
背面の脊椎 (合計) : 0; 肛門の骨: 0. Light brown with distal parts and anterior margins of fins, snout, nostrils, and gills blackish brown in young, possibly uniform blackish brown in adults (Ref. 11146). Body shape (shape guide): elongated.
A poorly known deep-water bottom-dwelling catshark found on mud bottoms of the upper continental slopes (Ref. 11146). Oviparous (Ref. 130868).
White, W.T., A.L. Stewart, H.L. O’Neill and G.J.P. Naylor, 2024. Dichichthyidae, a new family of deepwater sharks (Carcharhiniformes) from the Indo–West Pacific, with description of a new species. Fishes 2024, 9, 121. (Ref. 130868)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
系統多様性指数 (参照 82804): PD50 = 0.5625 [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): 4.0 ±0.5 se; based on size and trophs of closest relatives
回復力 (参照 120179): 低い, 4.5年~14年の倍増期間の最小個体群 (Fec assumed to be <100).
漁業の脆弱性 (Ref. 59153): Moderate to high vulnerability (54 of 100). 🛈