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Synodontis eupterus Boulenger, 1901

Featherfin squeaker
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Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Siluriformes (Catfishes) > Mochokidae (Squeakers or upside-down catfishes) > Mochokinae
Etymology: Synodontis: Greek, syn, symphysis = grown together + Greek, odous = teeth (Ref. 45335).
More on author: Boulenger.

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; benthopelagic; pH range: 6.2 - 7.5; dH range: ? - 15. Tropical; 22°C - 26°C (Ref. 1672); 17°N - 4°N

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Africa: White Nile (Ref. 3202, 28714), Niger, Volta, Chad, Kwa Ibo (Ref. 57223) and Cross basins (Ref. 52861).

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 30.0 cm SL male/unsexed; (Ref. 31256)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 1; Anal spines: 0. Diagnosis: gill slits not extending ventrally beyond pectoral-fin insertions; eye large, its diameter 23-34.5% of head length and 48-75% of snout length; post-orbital length at least 60% of snout length; maxillary barbels unbranched, longer than head, without tubercles and bordered by a rather broad basal membrane restricted to their anterior thirds; outer mandibular barbels with simple, thin and rather long ramifications; branches of inner mandibular barbels shorter, subdivided and tuberculate; mandibular teeth slender and moderately long, numbering 39-62 (62 in the holotype); denticulations of pectoral-fin spines weak on outer margin and well developed on inner margin; dorsal-fin spine smooth anteriorly, except for a few apical denticles; humeral process triangular and not keeled ventrally; adipose fin well developed and rather close to rayed dorsal fin; branched dorsal-fin rays as well as dorsal- and pectoral-fin spines prolonged into filaments; spots present on body and fins (Ref. 57223). Coloration: body more or less dark brown. Back, sides, head and fins with few isolated small spots; depending on individuals, spots on fins more or less aligned in series; maxillary barbels (including membranes) black; fin filaments darker than fins themselves (Ref. 57223).

Biology     Glossary (e.g. epibenthic)

Maximum TL was recorded at 22.2 cm, max. SL at 22.2 cm (Ref. 57223). Occurs over a muddy bottom but may also be found over rocks. Feeds mainly on insect larvae but will also take algae (Ref. 6868). This is also an upside-down species (Ref. 4537). Oviparous (Ref. 205).

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Oviparous (Ref. 205). Distinct pairing during breeding (Ref. 205).

Main reference Upload your references | References | Coordinator | Collaborators

Gosse, J.-P., 1986. Mochokidae. p. 105-152. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ISNB, Brussels, MRAC, Tervuren; and ORSTOM, Paris. Vol. 2. (Ref. 3202)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 02 September 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

Fisheries: of no interest; aquarium: commercial
FAO - Publication: search | FishSource |

More information

Trophic ecology
Food items
Diet compositions
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Ecology
Ecology
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Length-weight rel.
Length-length rel.
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Distribution
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Visual pigment(s)
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Genetics
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Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | Public aquariums | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01549 (0.00700 - 0.03427), b=2.88 (2.70 - 3.06), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).
Trophic level (Ref. 69278):  2.7   ±0.28 se; based on food items.
Resilience (Ref. 120179):  Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low to moderate vulnerability (27 of 100).