The Key to Scientific Names

Edited by James A. Jobling
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Tetragonopyga

(Apodidae; syn. Apus Little Swift A. affinis) Gr. τετραγωνος tetragōnos   square  < τετρα- tetra-  four-  < τεσσαρες tessares  four; γωνια gōnia  angle; πυγη pugē  rump; "The habit of placing the Little Swift (Cypselus affinis Gray) in the same genus as the European Swift (Micropus apus apus) and other fork-tailed species has long struck me as inconsistent.  The Little Swift is the only species placed by systematists in the Micropus group which has a square instead of a truly forked tail, and although it conforms in other respects to the characters of that large genus, I consider that on account of that structural character it may be placed in another genus.  As I find that there is no genus available for it, I propose the name  Tetragonopyga, gen. nov.   Type, Cypselus affinis Gray." (Bannerman 1932); "Tetragonopyga Bannerman, 1932, Bull. British Ornith. Club, LIII (ccclxiv), p. 72.  Type, by original designation, Cypselus affinis J. Gray, 1830." (JAJ 2021).


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