Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Ophidiiformes
(Cusk eels) > Bythitidae
(Viviparous brotulas) > Brosmophycinae
Etymology: Diancistrus: Greek, di = two + Greek, agkistron = hook (Ref. 45335); manciporus: Named for the species' lack of an upper preopercular pore (Latin 'mancus' = missing and 'porus' = pore). More on authors: Schwarzhans, Møller & Nielsen.
Environment: milieu / climate zone / depth range / distribution range
Marine; reef-associated; depth range 15 - 20 m (Ref. 57884). Tropical
Central Pacific: Tongatapu, Tonga.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 5.3 cm SL male/unsexed; (Ref. 57884); 6.7 cm SL (female)
Morphology | Morphometrics
soft rays: 64 - 67;
Vertebrae: 43 - 45. This species is characterized by the following: vertebrae 11+32-34=43-45, dorsal fin rays 79-84, anal fin rays 64-67; outer pseudoclasper with hook-like short and pointed extension and slightly bent distally and with thin supporter; inner pseudoclasper anteriorly connected to outer pseudoclasper, wide and concave due to broad thin flap, strongly anteriorly inclined; no scales on operculum; upper preopercular pore absent (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. 120744)
CITES (Ref. 118484)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00447 (0.00178 - 0.01122), b=3.10 (2.87 - 3.33), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.2 ±0.5 se; Based on size and trophs of closest relatives
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (13 of 100) .