International Commission on Zoological Nomenclature:
OPINIONS and DIRECTIONS

taxa names:

Tc

tcheric Wilkes 1817 [originally in Motacilla], Encyclopaedia Londinensis, vol. 16, p. 94 (suppressed under the plenary power for the purposes of the Principle of Priority but not for those of the Principle of Homonymy) (Aves). Opinion 1859