The Halictine Bees of Sri Lanka and the Vicinity. III. Sudila (Hymenoptera: Halictidae) Part 2

Abstract

Phylogeny of 6 Sudila species was discussed. Four groups were recognized as follows: (aulacophorum + jacobsoni) + kandiense + ((alphenum + paralphenum) + bidentatum). The Lasioglossum (Evy laeus) Zeiosoma group was regarded as closest to Sudilu tentatively. Cladistic analysis was used and the 2 species pairs, jacobsoni-aulacophonm and alphenum-paralphenum are very probably monophyletic and some dendrograms were presented. Cephalic polymorphism exhibited in Sudila species was noted and that recorded in some other Aculeata were reviewed. A role on the functional significance in male cephalic polymorphism was discussed.