(syn. Sericornis Ϯ Atherton Scrubwren S. keri) Gr. μεγας megas, μεγαλη megalē great; genus Acanthiza Vigors & Horsfield, 1827, thornbill; "The species magnirostris is somewhat aberrant, the bill longer and the front of the tarsus obscurely scutellate; in the form I have named S. m. keri the tarsus is clearly scutellate. In order to keep this in view, I propose the subgeneric name Megathiza and name Sericornis magnirostris keri Mathews as type, as MEGATHIZA KERI." (Mathews 1922).