Key to Scientific Names in Ornithology
(syn. Knipolegus Ϯ Rufous-tailed Tyrant K. poecilurus) Gr. ευ eu fine; genus Myiobius Darwin, 1839, tyrant flycatcher; "The genus Cnemotriccus Hellmayr (Empidochanes auct. nec Sclater) as currently understood is a far from homogeneous group. The genotype, C. fuscatus (Wied), is very close to the South American members of Empidonax Cabanis, and in fact the three species Cnemotriccus fuscatus, Empidonax euleri (Cabanis), and E. lawrencei Allen have been so thoroughly confused in the literature that an actual examination of specimens is often necessary in order to ascertainwhich form an author had in mind. ... On the other hand "Cnemotriccus" poecilurus (Sclater) is a very different bird with no close allies. Although by no means a believer in extreme generic refinement, still I feel that the relationships are obscured by the present arrangement and accordingly propose Eumyiobius, gen. nov. Type and only included species, Empidochanes poecilurus Sclater. Differs from Cnemotriccus Hellmayr in less rounded wing ... tail much shorter ... longer middle toe ... and more strongly curved claws. Style of coloration quite different (no supraorbital stripe; tail bicolored)." (Brodkorb 1937).
(Tityridae; Ϯ Whiskered Flycatcher M. barbatus) Gr. μυια muia, μυιας muias fly; βιος bios living, livelihood; "MYIOBIUS. G. R. Gray. TYRANNULA. Swains. Mr. Gould has adopted for the following species Mr. Swainson's generic appellation of Tyrannula, but Mr. G. R. Gray has pointed out that as Tyrannulus was proposed and published eleven years before, namely in 1816, by Vieillot, it becomes necessary to change the former name, and therefore he proposes Myiobius. 1. MYIOBIUS ALBICEPS. G. R. Gray. Muscipeta albiceps. D'Orb. et Lafr. Mag. de Zool. 1837, p. 47. ... 2. MYIOBIUS AURICEPS. Tyrannula auriceps. Gould, MS. ... 3. MYIOBIUS PARVIROSTRIS. Tyrannula parvirostris, Gould, MS. ... 4. MYIOBIUS MAGNIROSTRIS. Tyrannula magnirostris. Gould, MS." (Darwin 1839); "Myiobius Darwin, 1839, Zool. Beagle, 3, Birds, p. 46. Type, designated by International Commission, Muscicapa barbata Gmelin. ... For use of this name in its accustomed sense see 1956, Op. Decl. Int. Comm. Zool. Nomencl., 13, p. 245" (Traylor in Peters 1979, VIII, 116).
Synon. Platyrhynchus, Tyrannula.