Trichechus inunguis (Natterer, 1883) . In Pelzeln, Verh. Zool.-Bot. Ges. Wien, 33:89.

TYPE LOCALITY: Brazil, Amazonas, Rio Madeira, Borba .

DISTRIBUTION: Amazon basin of Brazil, Colombia, Ecuador, Guyana, and Peru.

STATUS: CITES - Appendix I; U.S. ESA - Endangered; IUCN - Vulnerable.

COMMENTS: Reviewed by Husar (1977, Mammalian Species, 72).