Ceratina (Zadontomerus), Ashmead

Flórez-Gómez, Nathalia, Ayala, Ricardo, Hinojosa-Díaz, Ismael & Morrone, Juan J., 2022, The Neotropical Species Of Small Carpenter Bees Of The Subgenus Ceratina (Zadontomerus) Ashmead, 1899 (Hymenoptera: Apidae), Zootaxa 5214 (2), pp. 189-223 : 190

Subgenus Zadontomerus Ashmead

Zadontomerus Ashmead , W. H. (1899). Classification of the bees, or the superfamily Apoidea . Trans. Amer. Entomol. Soc. 26: 49–00 [69]. Type species: Ceratina tejonensis Cresson, 1864 by original designation.

Ceratina ( Zaodontomerus) Cockerell, T. D. A. & Porter, W. (1899) . Contributions from the New Mexico Biological Station - VII. Observations on bees, with descriptions of new genera and species. Ann. Mag. Nat. Hist. 4 (7): 403–421 [404]. Unjustified emendation.

Diagnosis. Presence of two impunctate swellings on the frons of males and females, one on each side; pronotum with lateral carina extending to the forecoxa, but not continuing dorsally; gradulus on T4 and T5; dark metallic coloration, paraocular marks absent except in males of a few species; forecoxa with straight posterior margin; preoccipital margin carinate, weakly so in some species; fore and medial tibiae with one apical spiniform projection; base of hind tibia with a spine-like projection; wax plates on S2 and S3; males with medial tuft of hairs on T6, weakly evident in some species; males with more punctures than females, and generally, smaller; females with inner margin of eyes subparallel to slightly convergent below, males with eyes convergent to strongly convergent below; and clypeal marks and preoccipital carina more conspicuous in males.