Which endangered monkey has the scientific name Leontopithecus rosalia?

The endangered monkey with the scientific name Leontopithecus rosalia is the golden lion tamarin.

The golden lion tamarin is a small New World monkey of Brazil’s Atlantic coastal forest. Its scientific name is Leontopithecus rosalia, and its brilliant orange-gold fur and mane-like facial hair make it one of the world’s most recognizable primates.

The species is endemic to the Brazilian state of Rio de Janeiro, where much of its original habitat was fragmented or cleared. Conservation work has combined protected areas, forest restoration, reintroduction, and wildlife corridors. Golden lion tamarins also help regenerate forests by dispersing seeds after eating fruit.

A common confusion is with other lion tamarins, including the golden-headed lion tamarin, whose scientific name is Leontopithecus chrysomelas. The red-handed tamarin, emperor tamarin, and cotton-top tamarin belong to different genera. The scientific name in the question is therefore a precise taxonomic clue, not merely a description of the animal’s color.