By Miroslav Djuric, DVM, CAB International, Wallingford, UK.
Bee specialists from South Australia have described four new native bees. Three of these bee species have been described as having narrow faces and very long mouths, allowing them to feed on slender flowers found on the emu bush, a hardy native of the Australian desert environment, and to collect the nectar through a narrow constriction at the base of the emu bush flowers. Based on the authors' description, the way these bees have adapted to feed on emu bush flowers is an excellent example of evolution. The fourth species belongs to a different group and has a more commonly observed round-shaped head.
The four new species belong to the genus Euhesma. Their description is based on evaluation of DNA ‘barcoding’ and morphological comparison of the bees with museum specimens.