Several other "subgenera" were found to be identical to the taxa with which they generally are merged and are not labeled separately in the trees: Casarca (= Tadorna), Metopiana (= Netta), Oidemia (= Melanitta), and Charitonetta (= Bucephala).
Anhimids and Anseranas.--Monophyly of the Anhimidae and the waterfowl and the early branching of Anseranas were confirmed (Fig.
This analysis shows the Sinew (Mergellus al- bellus) to be either the sister genus to Bucephala (Fig.
Characters: heavy-bodied; relatively high aspect ratio wings with low surface area; legs placed far posteriorly, so walk poorly; arctic marginal marine habitat, also tundra and arctic forests; feed on shellfish and mollusks.
Links: Mergellus albellus; Smew (Mergellus albellus); Zwergsäger - Mergellus albellus; Mangoverde World Bird Guide Photo Page- Smew Mergellus albellus (useful photo); Mergini; Seaducks.org - Information on the Mergini Tribe commonly known as...
