Abstract
ABSTRACT Eigenmannia is one of the more taxonomically complex genera within the Gymnotiformes. Here we adopt an integrative taxonomic approach, combining osteology, COI gene sequences, and geometric morphometrics to describe three new species belonging to the E. trilineata species group from Colombian trans-Andean region. These new species increase the number of species in the E. trilineata complex to 18 and the number of species in the genus to 25. The distribution range of the E. trilineata species group is expanded to include parts of northwestern South America and southern Central America.
Highlights
Eigenmannia Jordan, Evermann, 1896 is the most diverse genus in the neotropical electric fish family Sternopygidae, with 22 valid species
Dutra (2015), including in their analysis of eight valid Eigenmannia species and eight undescribed species proposed two synapomorphies to support the monophyly of Eigenmannia: (1)
We noted that the degree to which the epipleural myorhabdoi bones extend over vertebrae 7–9 varies between species in both Eigenmannia and Sternopygus
Summary
Eigenmannia Jordan, Evermann, 1896 is the most diverse genus in the neotropical electric fish family Sternopygidae, with 22 valid species Peixoto et al (2015) restricted E. virescens to forms without dark horizontal stripes from the Paraná river and de La Plata river basins. This range-restriction invalidates records of Eigenmannia ascribed to E. virescens from the Catatumbo, Ranchería, Magdalena, Sinú, Atrato, Tuira, and Bayano rivers (Albert, 2003; Albert, Crampton, 2006; Maldonado-Ocampo, 2011). Because all trans-Andean forms previously ascribed to E. virescens present a superior medial stripe on the flank, we instead propose that they belong to the Eigenmannia trilineata species group
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