Key to Scientific Names in Ornithology
(Thamnophilidae; Ϯ Spiny-faced Antshrike X. setifrons) Gr. ξενος xenos stranger; ορνις ornis, ορνιθος ornithos bird; "XENORNIS, new genus GENERIC DIAGNOSIS.- A formicarian bird, possibly a member of the thamnophiline group but without close resemblance to any known species. ... TYPE.- Xenornis setifrons, new species. ... Of this bird we have but a single specimen, the relationships of which have long puzzled the members of our department of birds" (Chapman 1924).