Maués marmoset
The Maués marmoset (Mico mauesi) is a marmoset endemic to Brazil. It is found only on the west bank of the Maués Açu River, in the Amazonas state. References

Mico (genus)
Mammals of Brazil
Endemic fauna of Brazil
Mammals described in 1992
Taxa named by José Márcio Ayres
Taxa named by Russell Mittermeier