title: A new species of Triepeolus (Hymenoptera: Apidae), with comments on T. utahensis (Cockerell) and T. melanarius Rightmyer.
abstract: Triepeolus matildae Rightmyer, sp. nov., from Mexico (Baja California) and USA (California) is described and both genders are differentiated from the closely related species T. utahensis (Cockerell) using morphological characters. The synonymy of T. utahensis and T. heterurus was established in Rightmyer (2008); however, the younger name was used in that treatment, an error that is corrected herein. Males of both T. matildae and T. utahensis are additionally differentiated from T. melanarius Rightmyer, which is morphologically similar in that gender only. DNA barcoding evidence supporting the recognition of the new species is additionally presented.
authors.affiliation: Entomology Research Associate, San Diego Natural History Museum, Biodiversity Research Center of the Californias, Entomology Department, P. O. Box 121390, San Diego CA 92112-1390 USA.; Email: molly_rightmyer@yahoo.com.
authors.forename: Molly G
authors.initials: MG
authors.lastname: Rightmyer
authors.affiliation: University of California, San Diego, Division of Biological Sciences, Section of Ecology, Behavior, and Evolution, Mail Code 0116, 9500 Gilman Drive, La Jolla, CA 92037, USA; Email: unknown.
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Kono
authors.affiliation: University of California, San Diego, Division of Biological Sciences, Section of Ecology, Behavior, and Evolution, Mail Code 0116, 9500 Gilman Drive, La Jolla, CA 92037, USA; Email: unknown.
authors.forename: Joshua R
authors.initials: JR
authors.lastname: Kohn
authors.affiliation: University of California, San Diego, Division of Biological Sciences, Section of Ecology, Behavior, and Evolution, Mail Code 0116, 9500 Gilman Drive, La Jolla, CA 92037, USA; Email: unknown.
authors.forename: Keng-Lou James
authors.initials: KL
authors.lastname: Hung
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D001516:Bees / Q000033:anatomy & histology / Q000145:classification* / Q000235:genetics / Q000254:growth & development; D049628:Body Size; D017753:Ecosystem; D005260:Female; D008297:Male; D009929:Organ Size; D010802:Phylogeny