Classification / Names
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Gymnotiformes (Knifefishes) >
Sternopygidae (Glass knifefishes)
Etymology: Eigenmannia: From Eigenmann, 1910, researcher of faunistic studies (Ref. 45335); waiwai: The specific name waiwai is a reference to the indigenous people whose home territory proximates the type locality for the species.
Eponymy: Professor Dr Carl Henry Eigenmann (1863–1927) was a German-born American ichthyologist. [...] This species is named after the Waiwai indigenous people whose home territory is near where the holotype was collected in Pará, Brazil. (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
; Nước ngọt Sống nổi và đáy. Tropical
South America: Rio Mapuera, Rio Trombetas basin in Pará, Brazil.
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ? range ? - ? cm
Max length : 22.4 cm TL con đực/không giới tính; (Ref. 115689)
Short description
Khóa để định loại | Hình thái học | Sinh trắc học
Tia mềm vây hậu môn: 167 - 195. Eigenmannia waiwai differs from other members of the E. trilineata species group by having the length of anterodorsal process of maxilla equal to 1.5 times the width of the posterior nostril (vs. equal to 50% of the width of posterior nostril in E. antonioi, E. desantanai, E. guairaca, E. muirapinima, E. pavulagem, and E. vicentespelaea, or equal to the width of the posterior nostril in E. matintapereira, E. microstoma, and E. trilineata). In addition, it is distinguished from other species of the E. trilineata species group, with the exception of E. vicentespelaea, by having subterminal mouth (vs. terminal mouth). It can be diagnosed from E. vicentespelaea by having nine or ten longitudinal series of scales above the lateral line (vs. seven or eight), body depth at the vertical through the tip of longest pectoral-fin ray, 14.9-18.7% LEA (vs. 10.5-14.5%), depth of the posterodorsal expansion on infraorbitals 1 + 2 less than 50% of length of infraorbitals 1 + 2 (vs. approximately equal to length of infraorbitals 1 + 2), and length of the coronomeckelian bone equal to 20% of the length of Meckel’s cartilage (vs. 45% of the length of Meckel’s cartilage) (Ref. 115689).
Life cycle and mating behavior
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Peixoto, L.A.W., G.M. Dutra and W.B. Wosiacki, 2015. The electric glass knifefishes of the Eigenmannia trilineata species-group (Gymnotiformes: Sternopygidae): monophyly and description of seven new species. Zool. J. Linn. Soc. 175:384-414. (Ref. 115689)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00372 (0.00175 - 0.00789), b=2.97 (2.78 - 3.16), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Mức dinh dưỡng (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (12 of 100).
