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Gadiformes (Cods) >
Macrouridae (Grenadiers or rattails)
Etymology: Hymenocephalus: Named for its transparent membrane-like head covering (‘‘hymen head’’) and fragile nature of head bones (Ref. 100825).
More on authors: Jordan & Gilbert.
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
marina bentopelagisk; djupintervall 220 - 600 m (Ref. 98298). Temperate
Northwest Pacific: Sagami Bay, Japan.
Storlek / Vikt / Ålder
Könsmognad: Lm ?  range ? - ? cm
Max length : 10.0 cm TL hane/ej könsbestämd; (Ref. 559)
This species is distinguished by the following characters: pelvic fin rays 10-11; pectoral fin rays 16-18; projecting snout with thin, pointed tip, 20-25% HL; short barbel, 4-5% HL, and not reaching vertical through anterior margin of orbit; orbit diameter moderate, 25-30% HL; interorbital width 70-.80% HW; infraorbital width 16-20% HL; very long preopercular supporter, straight, 10-11% HL; gill rakers 18-22; ventral striae reaching to about 1/3 distance from pelvic fin bases to periproct; otolith with moderately high predorsal lobe and with colliculi separated, closely placed across narrow collum, terminating far from anterior and posterior rims of otolith; otholith length to height (OL:OH), 1.05; total colliculum length to pseudocolliculum length (TCL:PCL), 2.1 (Ref. 98298).
Cross section: angular.
Livscykel och parningsbeteende
Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
Schwarzhans, W., 2014. Head and otolith morphology of the genera Hymenocephalus, Hymenogadus and Spicomacrurus (Macrouridae), with the description of three new species. Zootaxa 3888(1):1-73. (Ref. 98298)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
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Harmless
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Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00219 (0.00111 - 0.00432), b=3.20 (3.03 - 3.37), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisk nivå (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Resiliens (Ref.
120179): Hög, lägsta populationsfördubblingstid mindre än 15 månader (Preliminary K or Fecundity.).
Sårbarhet i fisket (Ref.
59153): Low vulnerability (10 of 100).
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