Trichocolletes soror is a species of bee in the family Colletidae and the subfamily Colletinae. It is endemic to Australia. It was described in 2012 by Australian entomologists Michael Batley and Terry Houston.
Etymology The specific epithet soror (Latin: 'sister') refers to the similarity between this species and Trichocolletes rufibasis.
Description The body length is about 12–14 mm. The eyes are not hairy. Colouration is mainly black and red-brown to orange, with gold metasomal bands, and with orange hair.
Distribution and habitat The species occurs in coastal Western Australia near Geraldton. The type locality is East Yuna Reserve, 34 km west-north-west of Mullewa.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Chorizema racemosum, Comesperma scoparium, Jacksonia velutina, Mirbelia ramulosa, Mirbelia spinosa and Dampiera species.
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