(Thraupidae; Ϯ Peg-billed Finch A. bairdi) Gr. ακανθις akanthis, ακανθιδος akanthidos  small bird, probably a finch  < ακανθα akantha  thorn  < ακη akē  point; ωψ ōps, ωπος ōpos  appearance; "Genus ACANTHIDOPS, nobis.  (Aκανθις, ιδος = Acanthis, and ωψ = facies.)  GEN. CH. - Most nearly related to Automolus, Placellodromus, and allied genera in structure of the feet, &c., but very different in form of bill, and other characters.  ... Type, A. bairdi, sp. nov.  This remarkable genus is so very distinct from any other hitherto described that it is quite difficult to decide where to place it. It evidently belongs, however, to the Synallaxine group, on account of the structure of the feet, but the bill is so widely different from that of any other member of the family ("Dendrocolaptidae") as to suggest certain Fringilline forms, as Carduelis and Chrysomitris. In fact, the bill is so similar in form to that of the genera named that the collector had referred it to the latter genus" (Ridgway 1882); "ACANTHIDOPS RIDGWAY   ...  1 Close to, and possibly conspecific with, Haplospiza. These genera may be offshoots of Phrygilus." (Paynter in Peters 1970, XIII, 111).

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Recommended citation
Jobling, J. A. (2019). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2019). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 22 January 2019).