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Gymnotiformes (Knifefishes) >
Sternopygidae (Glass knifefishes) > Eigenmanninae
Etymology: Eigenmannia: From Eigenmann, 1910, researcher of faunistic studies (Ref. 45335); robsoni: Named for Robson Tamar da Costa Ramos, ichthyologist, for his contributions to studies of the Caatinga ecoregion, especially in the Parnaíba river basin; patronym.
Eponymy: Professor Dr Carl Henry Eigenmann (1863–1927) was a German-born American ichthyologist. [...] (Ref. 128868), visit book page.
Meio ambiente: milieu / Zona climática / intervalo de profundidade / faixa de distribuição
Ecologia
; Água doce bentopelágico. Tropical
South America: Northeastern Brazil.
Tamanho / Peso / Idade
Maturidade: Lm ?  range ? - ? cm
Max length : 15.2 cm SL macho/indeterminado; (Ref. 138579)
Descrição suscinta
Chaves de identificação | Morfologia | Morfometria
Raios anais : 182 - 228. This species, a member of the E. trilineata species-group, is distinguished by the following characters: anal-fin hyaline; absence of enlarged eye 16.2-21.3%; caudal filament short, 19.9-36.4 % LEA; no lateral line stripe; no superior midlateral stripe; A 182-228; scales rows above lateral line 12-15; scales on lateral line 107-131; premaxillary teeth 32-34; dentary teeth 35-44; endopterygoid teeth 9-12; depth of posterodorsal expansion on infraorbitals 1+2 half as long as infraorbitals 1+2 length; basibranchial 1 unossified; precaudal vertebrae 13; coronomeckelian bone length corresponding to 20% of length of Meckel’s cartilage (Ref. 138579).
Body shape (shape guide): elongated; Cross section: compressed.
Recorded in perennial and intermittent rivers with clear and lentic waters, sandy substrate with lots of aquatic vegetation. In perennial rivers, the riparian vegetation is typical of the Cerrado, with palms of Mauritia flexuosa, while in intermittent rivers, the riparian vegetation is the
'fringe forests', dominated by palm trees such as Copernicia prunifera (Ref. 138579).
Ciclo de vida ou comportamento de acasalamento
Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas
Dutra, G.M., T.P.A. Ramos and N.A. Menezes, 2022. Description of three new species of Eigenmannia (Gymnotiformes: Sternopygidae) from the rio Mearim and rio Parnaíba basins, northeastern Brazil. Neotropical Ichthyol. 20(1):e210117: 1-23. (Ref. 138579)
Status na Lista Vermelha da UICN (Ref. 130435: Version 2025-2 (Global))
Ameaça para os humanos
Harmless
Uso pelos humanos
Pescarias: sem interesse
Ferramentas
Relatórios especiais
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Fontes da internet
Estimativas baseadas em modelos
Índice de diversidade filogenética (Ref. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00355 (0.00161 - 0.00782), b=2.97 (2.77 - 3.17), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Nível Trófico (Ref. 69278) |
3.1 ±0.3 se; based on size and trophs of closest relatives |
Vulnerabilidade da pesca (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |