Coelioxys

Rocha Filho, Léo Correia Da & Packer, Laurence, 2017, Phylogeny of the cleptoparasitic Megachilini genera Coelioxys and Radoszkowskiana, with the description of six new subgenera in Coelioxys (Hymenoptera: Megachilidae), Zoological Journal of the Linnean Society 180 (2), pp. 354-413 : 393

COELIOXYS ( COELIOXYS S. S.) LATREILLE, 1809

Type species: Coelioxys quadridentata (Linnaeus, 1758) .

Diagnosis: Coelioxys ( Coelioxys s.s.) spp. is diagnosable through one unique characteristic found in no other species in the genus: the shape of the pronotal lobe, which is conspicuously rounded on its outer margin and weakly carinate on its inner margin ( Fig. 30 ).

Comments: Mitchell (1973) established this subgenus based only on North American and European species. Michener (2007), on the other hand, considered it as cosmopolitan. Thirteen species previously assigned to C. ( Coelioxys s.s.), such as Coelioxys serricaudata Baker, 1975 and the Australasian species ( Michener, 1965; Baker, 1975), do not belong to the clade that contains the type species of the subgenus (see also Rocha-Filho, 2016 for the Australian species), C. quadridentata . As understood here, C. ( Coelioxys s.s.) comprises only its type species and the Nearctic species Coelioxys sodalis Cresson, 1878 .

List of species: Coelioxys quadridentata and C. sodalis .

Figures

Figures 30 and 31. Female, frontal view of pronotal lobe (outer margin indicated by red arrow): 30, Coelioxys sodalis; 31, Coelioxys grindeliae. Scale bars: 1.5 mm.