Phalloceros mikrommatos, the Seguro toothcarp, is a species of poeciliid fish native to Brazil.
Distribution.
"Phalloceros mikrommatos" is found in the Rio João de Tiba drainage in Bahia, Brazil.
Size.
The females of this species grow to a total length of , while males remain smaller at .
Habitat.
The fish live in tropical freshwater; and are benthopelagic. 
Etymology.
The fish is named in Latin = "mikro-", menaing small; "ommatus", having an eye, referring to eye-like (ocellated) lateral spot.