(Tyrannidae; Ϯ Belted Flycatcher X. callizonus) Gr. ξενος xenos  stranger; τρικκος trikkos  unidentified small bird. In ornithology triccus signifies tyrant flycatcher; "a remarkable Tyrannid, which in coloration and structural details is unique  ...  When we unwrapped the specimens they were quickly recognized as belonging to an undescribed species, and a few minutes' casual inspection convinced us that we were dealing with a peculiarly distinct genus. It may be diagnosed as follows  XENOTRICCUS, new genus.   GENERIC CHARACTERS. — A medium-sized Tyrannid, the bill and development of the rictal bristles suggesting Aphanotriccus, which it also resembles in the cohesion of the outer and middle toes; feathers of the center of the pileum forming a conspicuous blackish crest, more developed than in Mitrephanes; wing relatively short and rounded; tail rounded and very long, exceeding the wing, suggesting Mecocerculus; tarsus long, more than twice the length of the middle toe without claw, suggesting Muscisaxicola and other long-legged Tæniopterinæ; coloration unique and bright   ...   The generic type is Xenotriccus callizonus, new species." (Dwight & Griscom 1927).
Var. Xonotriccus.
Synon. Aechmolophus.

Search for more names on the Key to Scientific Names in Ornithology by James A. Jobling.
Recommended citation
Jobling, J. A. (2018). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2018). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from www.hbw.com on 11 December 2018).