title: Taxonomic revision of Plesianthidium Cameron (Apoidea: Megachilidae: Anthidiini), an endemic southern African bee genus.
abstract: The southern African bee genus Plesianthidium Cameron is revised. It comprises twelve species. Two new species are described: Plesianthidium (Spinanthidium) richtersveldense sp. nov. (Namibia and South Africa) and P. (S.) namaquaense sp. nov. (South Africa). Two species, Plesianthidium calvini (Cockerell, 1932) and P. rufocaudatum (Friese, 1909), are reinstated as valid species. Keys for the identification of the species of Plesianthidium are given.
authors.affiliation: Agricultural Research Council, Private Bag X134, Queenswood 0121, South Africa / School of Biological and Conservation Sciences, University of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg, 3209, South Africa.; Email: eardleyc@arc.agric.za.
authors.forename: Connal
authors.initials: C
authors.lastname: Eardley
authors.affiliation: USDA ARS Bee Biology & Systematics Laboratory, Utah State University, Logan, UT 84322-5310, USA.; Email: terry.grisold@ars.usda.gov.
authors.forename: Terry
authors.initials: T
authors.lastname: Griswold
mesh_terms: D000353:Africa, Southern; D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D001516:Bees / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development; D049628:Body Size; D005260:Female; D008297:Male; D009929:Organ Size