Phalloceros leptokerasPhalloceros leptokeras, the Sapucaia toothcarp, is a species of poeciliid fish native to Brazil.DistributionPhalloceros leptokeras is found in Brazil in the middle portions of rio Paraíba do Sul drainage.SizeThe females of this species grow to a total length of, while males remain smaller at.HabitatThe fish live in tropical freshwater, and are pelagic.EtymologyThe fish is named in Latin; leptos means "narrow", and keras, "horn", refers to the large, slender sickle-like hook on the gonopodial appendix.