Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Siluriformes
(Catfish) > Mochokidae
(Squeakers or upside-down catfishes)
Etymology: Microsynodontis: Greek, mikros = small + Greek, synodon = with the teeth growing all together (Ref. 45335); nasutus: Species name from the Latin nasutus, meaning large nosed, in reference to the long snout of this species (Ref. 52369).
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal. Tropical
Africa: endemic to the Okano River (Ogowe River tributary) in northern Gabon (Ref. 52369, 81251).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 3.7 cm SL male/unsexed; (Ref. 52369)
Morphology | Morphometrics
soft rays: 10 - 11;
Vertebrae: 36. Diagnosis: snout long (50.0-53.3% HL)(Ref. 52369, 81251). Body moderately slender; adipose fin moderately long, its base 28.2-32.0% SL; caudal peduncle slender, its depth 6.7-9.8% SL; eye diameter 13.8-17.4% SL; supracleithral process not reaching to vertical through posterior-most tip of nuchal shield; body without numerous dark brown elongate spots; dorsal spine curved; anterior edge of pectoral spine with antrorse serrations; both sexes with short (< 0.1 mm) tubercles on dorsal and lateral surfaces of head; caudal fin rounded (Ref. 81251).
Found in a whitewater river (Ref. 52369).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Ng, H.H., 2004. The Microsynodontis (Teleostei: Siluriformes: Mochokidae) of the lower Guinea region, west central Africa, with the description of eight new species. Zootaxa 531:1-52. (Ref. 52369)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 118484)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5002 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01318 (0.00585 - 0.02970), b=2.96 (2.77 - 3.15), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.0 ±0.4 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 (10 of 100) .