Teleostei (teleosts) >
Ophidiiformes (Cusk eels) >
Dinematichthyidae (Viviparous brotula)
Etymology: Diancistrus: Greek, di = two + Greek, agkistron = hook (Ref. 45335); pohnpeiensis: Named for its type locality, Pohnpei Island.
More on authors: Schwarzhans, Møller & Nielsen.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; reef-associated; depth range 27 - 46 m (Ref. 57884). Tropical
Central Pacific: apparently endemic to the Pohnpei State, Micronesia. Appears to be allopatric with Diancistrus eremitus (from Hermit and Stewart Is. And Fiji further south) and with Diancistrus mennei (from Marshall and possibly Kiribati).
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 8.2 cm SL male/unsexed; (Ref. 57884); 5.9 cm SL (female)
Short description
Identification keys | Morphology | Morphometrics
Dorsal soft rays (total): 83 - 85; Anal soft rays: 66 - 69; Vertebrae: 45 - 46. The species is characterized by the following: vertebrae 11+34-35=45-46, dorsal fin rays 83-85, anal fin rays 66-69; very large eyes (>3.0% SL), D/V 6; outer pseudoclasper large, more than twice the length of inner pseudoclasper, wing-shaped, with moderately narrow base and strongly expanded tip with fleshy bulge; inner pseudoclasper joined to outer pseudoclasper anteriorly, thin, with single sharply pointed tip, slightly extending over anterior part of outer pseudoclasper; moderately broad scale patch on cheek with 5-6 scale rows on upper cheek, 2-3 scales on operculum above opercular spine (1 row); the head massive; otolith moderately slender, length to height ratio 1.9-20 (Ref. 57884).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Schwarzhans, W., P.R. Møller and J.G. Nielsen, 2005. Review of the Dinematichthyini (Teleostei, Bythitidae) of the Indo-West-Pacific. Part I. Diancistrus and two new genera with 26 new species. The Beagle, Records of the Museum and Art Galleries of the Northern Territory 21:73-163. (Ref. 57884)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
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Internet sources
Estimates based on models
Preferred temperature (Ref.
123201): 28 - 28.7, mean 28.7 °C (based on 4 cells).
Phylogenetic diversity index (Ref.
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).
Trophic level (Ref.
69278): 3.3 ±0.5 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
