From Opus

Genus Pterocnemia

[edit] Description

[edit] Taxonomy

If recognized, Pterocnemia would be a genus in the family Rheidae.

[edit] Pterocnemia vs. Rhea

Some authorities (Howard & Moore, 2003; SACC, 2008) place Lesser Rhea (R. pennata) in the monotypic genus Pterocnemia. However, Sibley & Monroe (1996) and Clements (2007) both place pennata within Rhea and the Opus awaits further clarification.