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| | A PHYLOGENETIC ANALYSIS OF RECENT ANSERIFORM GENERA USING MORPHOLOGICAL CHARACTERS (Site not responding. Last check: 2007-11-02) |
 | | Also, there is a sister-group relationship between Coscoroba and the "typi- cal" swans (Cygnus, Olor; 6 characters) and be- tween Cereopsis and the "typical" geese (Anser, Branta; 2 characters). |
 | | between tribes, early branches from the com- mon ancestor to the "true" geese and swans, or, for Cereopsis, an aberrant shelduck or the sole member of a separate tribe (Peters 1931; Delacour and Mayr 1945; Delacour 1954, 1964c; Johnsgard 1961a, e, 1978; Woolfenden 1961; Frith 1967; Kear and Murton 1973; Bottjer 1983). |
 | | A number of "aberrant" southern genera were sorted tentatively among these tribes: Anser- anas and Plectropterus to the Cairinini; Cereopsis, Tachyeres, and Lophonetta to the Tadornini; Stic- tonetta, Malacorhynchus, and Hymenolaimus to the Anatini; and Thalassornis to the Oxyurini. |
| elibrary.unm.edu /sora/Auk/v103n04/p0737-p0754.html (16781 words) |
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