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No image available for this species; drawing shows typical species in Distichodontidae.
分類 / Names 共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
> 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: milieu / climate zone / 深さの範囲 / distribution range 生態学
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).
サイズ / 重さ / 年齢
成熟: Lm? range ? - ? cm Max length : 10.6 cm SL オス/雌雄の選別がない; (Ref. 94471)
簡単な記述 検索表 | 形態学 | 形態計測学
背面の脊椎 (合計) : 0; 背鰭 (合計) : 15 - 17; 肛門の骨: 0; 臀鰭: 11 - 12; 脊つい: 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).
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 成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
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)
Phylogenetic diversity index (参照 82804): 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).
栄養段階 (参照 69278): 3.0 ±0.3 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100). 🛈
