(syn. Melanerpes Ϯ Acorn Woodpecker M. formicivorus) Gr. βαλανος balanos  acorn; σφυρα sphura, σφυρας sphuras  hammer, mallet; "Balanosphyra gen. nov. (Picidæ).  Type. — Picus formicivorus Swainson.  Medium sized Picidæ similar to Melanerpes but with antrorse prefrontal feathers ("nasal tufts") developed into conspicuous dense tufts; feathers of breast broad, imbricated, and firm; eighth, seventh and eighth, or sixth, seventh and eighth primaries longest; ninth primary nearly as long as fifth, and tenth (outermost) relatively much smaller (only about one-fourth as long as ninth), narrower, and more acuminate.   (βαλανος, an acorn; σφυρα, a hammer.)" (Ridgway 1911).

Search for more names on the Key to Scientific Names in Ornithology by James A. Jobling.
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 24 January 2019).