Pituna

Costa, Wilson J. E. M., 2007, Taxonomy of the plesiolebiasine killifish genera Pituna, Plesiolebias and Maratecoara (Teleostei: Cyprinodontiformes: Rivulidae), with descriptions of nine new species, Zootaxa 1410, pp. 1-41 : 5

Key to species of the genus Pituna

1a. Scales in longitudinal series 25-29; pectoral fin with vertical rows of small dark gray spots or dark gray bars in males; frontal squamation F-patterned; anterior section of supraorbital series of neuromasts continuous.............................................................................................................................................................. 2

1b. Scales in longitudinal series 23-24; pectoral fin without dark marks; frontal squamation D-patterned; anterior section of supraorbital series of neuromasts interrupted ........................... P. brevirostrata , new species

2a. Dark marks on flank mainly longitudinally arranged in females................................................................. 3

2b. Dark marks on flank mainly obliquely or irregularly arranged in females.................................................. 4

3a. Body depth 21.3–24.6 % SL in males and 18.1–23.8 % SL in females; caudal peduncle depth 15.5–17.1 % SL in males and 14.7–15.7 % SL in females; head depth 69.4–75.4 % SL in males and 65.2–68.1 % SL in females; 4–5 bars or transverse rows of spots on the pectoral fin in males ........................ P. poranga Costa

3b. Body depth 24.6–27.2 % SL in males and 24.1–26.3 % SL in females; caudal peduncle depth 17.6–19.5 % SL in males and 15.6–17.9 % SL in females; head depth 74.9–80.7 % SL in males and 71.8–77.1 % SL in females; 7–8 bars or transverse rows of spots on the pectoral fin in males .................. P. compacta (Myers)

4a. Dark marks obliquely arranged on flanks in females; 1 + 1+ 13–17 + 1 infraorbital neuromasts; 2–4 teeth on 2nd pharyngobranchial ........................................................................................................................... 5

4b. Dark marks irregularly arranged on flanks in females; 1 + 1+ 17–21 + 1 infraorbital neuromasts; 4–7 teeth on 2nd pharyngobranchial .................................................................................... P. schindleri , new species

5a. Oblique rows of dark brown dots never forming bars on flank in female; caudal-fin rays 28–31 ................ ....................................................................................................................... P. obliquoseriata , new species

5b. Oblique rows of dark brown dots coalesced to form oblique bars; caudal-fin rays 26–27............................ .................................................................................................. P. xinguensis Costa & Nielsen, new species