Simpsonichthys boitonei

{{Short description|Species of fish}}

{{Speciesbox

| image = Simpsonichthys_boitonei.jpg

| status = VU

| status_system = IUCN2.3

| status_ref =

| genus = Simpsonichthys

| species = boitonei

| image_caption = Simpsonichthys boitonei

| authority = Carvalho, 1959

| synonyms_ref =

| synonyms = Cynolebias boitonei (Carvalho, 1959)

}}

Simpsonichthys boitonei, the Brasília lyrefin, is a species of fish in the family Rivulidae. It is endemic to Brazil.