Phylogenetic Relationships

By T. Mes, G. Wijers, H. ‘. Hart. Nematoda, 2021

570 citations recorded by the source corpus.

Three genera of waterfowl (Anseriformes) are known only from subfossil remains from New Zealand (Oliver 1955, Howard 1964): Cnemiornis Owen 1866, Euryanas Oliver 1930, and Pachyanas Oliver 1955. The first two are represented by numerous well-preserved elements, and Cnemiornis is renowned for its radical morphological modifications related to flightlessness. Pachyanas chathamica is represented by relatively few skeletal elements (Oliver, 1955) and is not discussed here; the genus currently is under study independently by R. J. Scarlett (pers. comm.) and P. R. Millener (pers. comm.). With the exception oi Cnemiornis, which has a comparatively long history of taxonomic reclassification and description, these subfossil endemics have received little attention from avian systematists since their original description. A phylogenetic analysis of Recent anseriform genera (Livezey, 1986), based largely on comparative osteology, permitted a reappraisal of the relationships and classification of these endemic waterfowl. In this paper I: (1) present analyses of characters of Cnemiornis, Euryanas, and the extinct New Zealand swan Cygnus sumnerensis; (2) construct phylogenetic trees for these groups based on these characters; (3) propose a revised classification of these taxa; and (4) discuss selected evolutionary and biogeographic implications of these findings.

Subfields: Paleontology

View Paper: https://www.semanticscholar.org/paper/7617c360e80bcc96dd0b82d8b37abbb7568b50fd

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In Paleontology

1. A. Ekanayaka
2. A. Hundsdörfer
3. M. Wink
4. U. Fritz
5. P. Široký

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