Key to species of the “ Eigenmannia trilineata ” species group

• 1a Number of premaxillary teeth 27–40 .............................................................. 2

• 1b Number of premaxillary teeth 8–26 ................................................................ 7

• 2a Number of premaxillary teeth 27 ....................................................................3

• 2b Number of premaxillary teeth 32–40 .............................................................. 4

• 3a Suborbital depth 18 3–14 8% HL ..................................... Eigenmannia besouro

• 3b Suborbital depth 30–37 7% HL ................................ Eigenmannia camposi n sp

• 4a Number of premaxillary teeth 32 ....................................................................5

• 4b Number of premaxillary teeth 35–40 ................................. Eigenmannia wawai

• 5a Number of teeth in dentary 23 ....................................... Eigenmannia trilineata

• 5b Number of teeth in dentary 35–60 .................................................................. 6

• 6a Number of teeth in dentary 35–39 .............................. Eigenmannia magoi n sp

• 6b Number of teeth in dentary 56–60 ........................ Eigenmannia zenuensis n sp

• 7a Number of premaxillary teeth 17–26 .............................................................. 8

• 7b Number of premaxillary teeth 8–16 ................................................................ 9

• 8a Number of teeth in dentary 16–18 .................................. Eigenmannia correntes

• 8b Number of teeth in dentary 19–26 ................................................................ 14

• 9a Number of endopterygoid teeth 5–7 ............................................................ 10

• 9b Number of endopterygoid teeth 8–16 ..........................................................11

• 10a Orbital diameter 11 4–15 0 HL ........................................ Eigenmannia loretana

• 10b Orbital diameter 15 7–23 9 HL ........................................ Eigenmannia guairaca

• 11a Oral width 10 HL 19% HL ............................................................................12

• 11b Oral width 20 HL 25 1% HL ........................................... Eigenmannia antonioi

• 12a Suborbital depth 18–28 ...................................................................................13

• 12b Suborbital depth 29 9–40 8 ......................................... Eigenmannia microstoma

• 13a Number of premaxillary teeth 8–10 .......................... Eigenmannia muirapinima

• 13b Number of premaxillary teeth 13–16 .......................... Eigenmannia pavulagem

• 14a First basibranchial ossified ................................................... Eigenmannia sayona

• 14b First basibranchial unossified ..........................................................................15

• 15a Precaudal vertebrae 11–12 ............................................. Eigenmannia desantanai

• 15b Precaudal vertebrae 13–15 ..............................................................................16

• 16a Precaudal vertebrae 13 ............................................. Eigenmannia matintapereira

• 16b Precaudal vertebrae 15 .............................................. Eigenmannia vicentespelaea