A new species of livebearer in the genus Pamphorichthys has been described from south central Brazil.
Named Pamphorichthys pertapeh by Carlos Figueiredo in a recent issue of the journal Zootaxa, the new species is distinguished from other poeciliines in having a combination of: bifurcate teeth on the dentary and the external tooth row of the premaxilla, the distalmost segments of both the third and anterior branches of the fourth gonopodial rays independently fused into elongated segments, dark longitudinal stripe on the caudal peduncle in females, heavily pigmented urogenital region of females, distal curvature of the third pelvic-fin ray of males and a specialized pair of anal scales anterior to the urogenital opening in females.
Pamphorichthys pertapeh is known from the So Francisco river drainage, and is named after its type locality, Lagoa Perta-p.
The fish was collected along the shores of the lake in clear and shallow waters near grasses and submerged bushes, and with a sandy bottom.
For more information, see the paper: Figueiredo, CA (2008) A new Pamphorichthys (Cyprinodontiformes: Poeciliidae: Poeciliini) from central Brazil. Zootaxa 1918, pp. 59"68.