1) Genus lutra 2) Mammal genus 
Lutra is a genus of otters. It is one of seven in the subfamily Lutrinae. ==Taxonomy and evolution== The genus includes the following living species: The genus most likely evolved in Asia during the late Pliocene epoch; the oldest fossil belonging to the genus is of the species Lutra palaeindica, and dates from the late Pliocene. ==Habitat== Lutra...
[n] - in some classifications considered a genus of the subfamily Lutrinae
Lutra A genus of otters; including, Lutra lutra: European otter; and Lutra sumatrana: Hairy-nosed otter.
genus Lutra noun in some classifications considered a genus of the subfamily Lutrinae