Eigenmannia trilineata Lopez and Castello 1966

KEY TO THE SPECIES OF EIGENMANNIA TRILINEATA SPECIES GROUP 1a. Pectoral fin dusky or with conspicuous dark blotch; anal fin uniformly darkened............................................................. Eigenmannia matintapereira sp. nov. (Rio Uneiuxi and Rio Urubaxi, Rio Negro basin, Brazil) 1b. Pectoral and anal fins hyaline............................................................................................................2 2a. Mouth subterminal...........................................................................................................................3 2b. Mouth terminal............................................................................................................................... 4 3a. Body depth at vertical through the tip of the longest pectoral-fin ray, 14.9–18.7% LEA; nine or ten longitudinal series of scales above lateral line............................................................................................................................. Eigenmannia waiwai sp. nov. (Rio Mapuera and Rio Trombetas, Rio Trombetas basin, Brazil) 3b. Body depth at vertical through the tip of the longest pectoral-fin ray, 10.5–14.5% LEA; seven or eight longitudinal series of scales above lateral line..................................................................................................................................... Eigenmannia vicentespelaea (caves of São Vicente I and II, Rio Tocantins basin, Brazil) 4a. Suborbital depth, 29.9–46.6% HL........................................................................................................5 4b. Suborbital depth, 18.2–28.9% HL........................................................................................................6 5a. Total number of premaxillary teeth 31–33, arranged in four rows; total number of dentary teeth 31; length of coronomeckelian bone 20% length of Meckel’s cartilage..................................................................................... Eigenmannia trilineata (Río Yabebury and Río San Javier, Rio Paraná basin; and Río de La Plata basin, Argentina) 5b. Total number of premaxillary teeth 16 arranged in three rows; total number of dentary teeth 16; length of coronomeckelian bone 45% length of Meckel’s cartilage................................................................................................................................................... Eigenmannia microstoma (Rio São Francisco basin, Brazil) 6a. Inferior medial stripe, one scale high; precaudal vertebrae 11–12............................................................................................................ Eigenmannia desantanai sp. nov. (Rio Cuiabá, Rio Paraguai basin, Brazil) 6b. Inferior medial stripe, two or three scales high; precaudal vertebrae 13–15................................................7 7a. Pectoral-fin rays, ii,11–12.................................................................................................................. 8 7b. Pectoral-fin rays, ii,13–15..................................................................................................................9 8a. Orbital diameter 15.4–19.4% HL; 170–198 anal-fin rays; eight or nine endopterygoid teeth; 13–14 precaudal vertebrae...... Eigenmannia muirapinima sp. nov. (Igarapé Santo Antônio and Lago Jará, Rio Amazonas basin, Brazil) 8b. Orbital diameter 11.4–15.0% HL; 151–170 anal-fin rays; five or six endopterygoid teeth; 15 precaudal vertebrae.................... Eigenmannia guairaca sp. nov. (Riacho Água do Ó, upper Rio Paraná basin, Brazil) 9a. Width of mouth, 20.0–25.1% HL; 11–13 premaxillary teeth........................................................................................................................ Eigenmannia antonioi sp. nov. (Rio Anapu, Rio Amazonas basin, Brazil) 9b. Width of mouth, 10.8–19.0 HL; 15–21 premaxillary teeth.......................................................................................................................... Eigenmannia pavulagem sp. nov. (Rio Capim, Rio Guamá basin, Brazil)
Published as part of Peixoto, Luiz Antônio Wanderley, Dutra, Guilherme Moreira & Wosiacki, Wolmar Benjamin, 2015, The Electric Glass Knifefishes of the Eigenmannia trilineata species-group (Gymnotiformes: Sternopygidae): monophyly and description of seven new species, pp. 384-414 in Zoological Journal of the Linnean Society 175 (2) on page 387, DOI: 10.1111/zoj.12274, http://zenodo.org/record/6497627