Genus Megaphyllum Verhoeff, 1894

Updated diagnosis.

A genus of Brachyiulini differing from contribal genera by the following combination of characters: promeres positioned slightly to considerably laterally (up to ca. 45° in species of Megaphyllum s. str.) rather than completely anteriorly in relation to opisthomeres; promere visibly broader than opisthomere, with a well-developed median groove partly enveloping the opisthomere; opisthomere possessing a well-developed basoposterior process, clearly detached from CBO in at least ~ its distal 1/3, a differently developed, sometimes vestigial anterior process, and lacking lateral process.