Phalloceros buckupiPhalloceros buckupi, the Jacareí toothcarp, is a species of poeciliid fish native to Brazil.DistributionPhalloceros buckupi is found in the Rio Jacareí drainage and neighbouring, which flows into the Baía de Paranaguá in Paraná, Brazil.SizeThe females of this species grow to a total length of, while males remain smaller at.HabitatThe fish live in tropical freshwater; and are benthopelagic.EtymologyThe fish is named in honor of Paulo A. Buckup, the collector of the most specimens of this species, and for his many contributions to neotropical ichthyology.