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Eugnathichthys virgatus  Stiassny, Denton & Monsembula Iyaba, 2013

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Eugnathichthys virgatus
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Characiformes (Characins) > Distichodontidae (Distichodus)
Etymology: Eugnathichthys: Greek, eu = good + Greek, gnathos = jaw + Greek, ichthys = fish (Ref. 45335);  virgatus: This species is named virgatus, from the Latin, in reference to the conspicuous midlateral band or streak forming the characteristic pigmentation patterning of the species in life and in preservation (Ref. 94471).

Environment / Climate / Range Ecology

Freshwater; benthopelagic.   Tropical

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

Africa: middle Congo River basin, in the Sangha, Lulonga, Ruki (Ref. 94471), Itimbiri and Aruwimi (Ref. 106290), in Republic of Congo and Democratic Republic of the Congo. Possibly also in the Ubangi (Ref. 94471).

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 10.6 cm SL male/unsexed; (Ref. 94471)

Short description Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 15-17; Anal spines: 0; Anal soft rays: 11 - 12; Vertebrae: 42 - 43. Diagnosis: Eugnathichthys virgatus is unique among congeners in the possession of body pigmentation dominated by a broad lateral band intersected by numerous vertical bars resulting in a midlateral, checkerboard-like pigmentation patterning both in life and in preservation (Ref. 94471). Internally it is characterized by a marked reduction in dentition on the fifth ceratobranchial elements of the pharynx; externally it differs from congeners in the possession of a reduced total number of pectoral-fin rays, 13-15 vs. 16-18 (Ref. 94471). Eugnathichthys virgatus is further readily distinguished from E. eetveldii by the possession of 66-72 pored lateral line scales from opercle to caudal flexion vs. 96-103; 10-12 scale rows between the lateral line and the dorsal-fin origin vs. 14 or 15; and 8 or 9 scale rows between the lateral line and pelvic-fin insertion vs. 10 (Ref. 94471).It differs from E. macroterolepis in the possession of 8 or 9 scale rows between the lateral line and the pelvic-fin insertion vs. 6 or 7 (Ref. 94471).

Biology     Glossary (e.g. epibenthic)

This species lives in heavily shaded, highly humic forest rivers (Ref. 94471). Gut morphology and contents suggest that the species feeds exclusively on fish fins (Ref. 94471).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Stiassny, M.L.J., J.S.S. Denton and Monsembula Iyaba R.J.C., 2013. A new ectoparasitic distichodontid of the genus Eugnathichthys (Characiformes: Citharinoidei) from the Congo basin of central Africa, with a molecular phylogeny for the genus. Zootaxa 3693(4):479-490. (Ref. 94471)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 115941)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries:
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Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishes of Iran | Fishtrace | GenBank(genome, nucleotide) | GloBI | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.6250   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm Total Length, based on all LWR estimates for this body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.0   ±0.3 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Low vulnerability (10 of 100) .