Phallotorynus pankalos Lucinda, Rosa, Reis, 2005

Ota, Renata Rúbia, Deprá, Gabriel de Carvalho, Graça, Weferson Júnio da & Pavanelli, Carla Simone, 2018, Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated, Neotropical Ichthyology 16 (2), pp. 1-111 : 100

Phallotorynus pankalos Lucinda, Rosa, Reis, 2005

Fig. 36

Body elongated; greatest depth contained 4.0 to 5.0 and caudal peduncle depth 6.6 to 7.6 times in SL; head length 4.3 to 4.8, predorsal distance 1.5 to 1.6 in SL; snout length 3.3 to 3.9, horizontal orbital diameter 2.2 to 2.8 and least interorbital width 2.1 to 2.8 in HL. Mouth superior; premaxilla with 12 and dentary with 13 teeth. Longitudinal series with 28-30 scales and transverse series with 8 scale rows. Dorsal fin with 8 rays, pectoral fin with 10 or 11, pelvic fin with 5 and anal fin with 10 (males) or 11 (females) rays ( Lucinda et al., 2005; Lucinda, Graça, 2015). Ground color pale brown; scales with dark-brown border, conferring reticulate pattern to body; six to nine dark-brown rounded to irregular spots aligned on lower half of flank, alternated with dark-brown stripes.

Maximum standard length. 27.9 mm.

Biological data. First maturation size estimated at 18.2 mm SL for females, which possess small fecundity and high mortality rate after the first reproduction ( Súarez et al., 2009).

Distribution. Only known from córrego Sossego, córrego Mirim and córrego Piraí, rio Iguatemi drainage.

Remarks. Phallotorynus pankalos has been captured in the rio Iguatemi drainage, right bank of the upper rio Paraná, since 2000 by Y. R. Súarez and collaborators. Lucinda et al. (2005), in a systematic and biogeographic study of Phallotorynus Henn, 1916 , described the new species.Another Phallotorynus species, possibly new according to P.H. Lucinda (in an e-mail, [e-mail], 2014), was captured in the rio Amambaí, right bank of the upper rio Paraná in 2014, also by Y. R. Súarez and collaborators. This species is similar to P. pankalos in the number of dark-brown spots on flank, but the first ones can be fused, forming a dark-brown stripe. Despite this, only two females were captured, and considering the major importance of males’ gonopodium morphology as diagnostic character, it was not included herein.

Figures

Fig. 36. a. Melanorivulus sp., NUP 17575, córrego Querência, Amambaí, State of Mato Grosso do Sul (top, female, 24.7 mm SL; bottom, male, 28.3 mm SL). b. Pamphorichthys hollandi, NUP 16549, rio Baia, Taquarussu, State of Mato Grosso do Sul, Brazil (top, female, 22.8 mm SL; bottom, male, 17.6 mm SL). c. Phalloceros harpagos (top, female, NUP 9360, 22.7 mm SL, female, córrego de nome desconhecido, Jatei, State of Mato Grosso do Sul; bottom, male, NUP 1938, 18.0 mm SL, riacho Caracu, Porto Rico, State of Paraná). d. Phallotorynus pankalos, NUP 5839, córrego Sossego, tributary of the rio Iguatemi, Paranhos, State of Mato Grosso do Sul (top, female, 28.4 mm SL; bottom, male, 18.6 mm SL). e. Phallotorynus victoriae, NUP 1603, lagoa do Portinho, tributary of the rio Paraná, Três Lagoas, State of Mato Grosso do Sul (top, female, 14.6 mm SL; bottom, male, 18.6 mm SL). f. Poecilia reticulata, fresh specimens, uncat (top, female, 35.2 mm SL; bottom, male, 20.3 mm SL). g. Plagioscion squamosissimus, 330.0 mm SL, fresh specimen, uncat.