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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).
Lingkungan: lingkungan / zona iklim / kisaran kedalaman / jangkauan distribusi
Ekologi
; air tawar bentopelagis. Tropical
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).
Ukuran / Berat / umur
Kematangan: Lm ?  range ? - ? cm
Max length : 10.6 cm SL jantan/; (Ref. 94471)
deskripsi pendek
Kunci identifiaksi (pengenalan) | Morfologi | Morfometrik
Duri punggung (Keseluruhan (total)) : 0; duri punggung lunak (Keseluruhan (total)) : 15 - 17; Duri dubur: 0; Sirip dubur lunak: 11 - 12; vertebrata, bertulang belakang: 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).
Siklus hidup dan perilaku kawin
Kematangan | Reproduksi, perkembang biakan | Pemijahan | telur-telur | Fekunditas | Larva
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)
Status IUCN Red List (Ref. 130435: Version 2025-2 (Global))
ancaman kepada manusia
Harmless
penggunaan manusia
Alat, peralatan
laporan khas
muat turun XML
Sumber internet
Estimasi berdasarkan model
Indeks keanekaragaman filogenetik (Acuan 82804) |
PD50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00447 (0.00185 - 0.01077), b=3.17 (2.96 - 3.38), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Tingkat Trofik (Acuan 69278) |
3.0 ±0.3 se; based on size and trophs of closest relatives |
Kerentanan Penangkapan Ikan (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |