The Key to Scientific Names

Edited by James A. Jobling
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Perissonetta

(Anatidae; syn. Aythya Ring-necked Duck A. collaris) Gr. περισσος perissos  wonderful; νηττα nētta  duck; "Perissonetta, gen. nov. 1   Diagnosis.— Similar to Nyroca, but length of exposed culmen equal to length of inner toe with claw (instead of decidedly shorter); feathering on sides of maxilla extending forward as far as the feathering at the base of the culmen; anterior outline of feathering at the base of culmen broadly convex; and length of wing only about 4 times the length of exposed culmen.  ...   Type. — Anas collaris Donovan.  ...  As the characters that we have above given show, this species forms one of the most trenchantly distinct groups among the genera allied to Nyroca.   ...   1 perissós, mirabilis; nētta, anas." (Oberholser 1921); "Perissonetta Oberholser, 1921, Proc. Indiana Acad. Sci, 1920 (1921), p. 110.  Type, by original designation, Anas collaris Donovan, 1809." (JAJ 2021).


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