Euglossa mandibularis

Hinojosa-Díaz, Ismael A. & Engel, Michael S., 2014, Revision of the orchid bee subgenus Euglossella (Hymenoptera: Apidae), Part II: The viridis and mandibularis species groups, Journal of Melittology 2014 (36), pp. 1-108 : 80-81

Key to species of the mandibularis species group

NOTE: Males remain unknown for E. perfulgens , while females are as of yet undiscovered for E. bigibba .

1. Male: antenna with 11 flagellar articles; metasoma with seven exposed terga; metatibia inflated bearing organ slit (setose-lined opening) ............................. 2

—. Female: antenna with 10 flagellar articles; metasoma with six exposed terga; metatibia with well-developed and expanded corbicula ................................... 3

2(1). Malar area twice as long as diameter of mid-flagellar articles ( Fig. 135); punctures on second metasomal tergum large (maximum length nearly 0.50x mid-ocellus diameter), longitudinally elongate, similar to punctures on third to seventh terga; malar area and mandibles predominantly ivory colored ( Figs. 134–135); large green bees with some blue highlights and moderate golden-bronzy iridescence [western areas of Amazon Basin ( Peru and Brazil)] ................................................................................ E. (E.) bigibba Dressler

—. Malar area roughly 1.25 times as long as diameter of mid-flagellar articles ( Fig. 121); punctures on second metasomal tergum small (puncture diameter about 0.20x mid-ocellus diameter), round, similar to punctures on third and anterior half of fourth terga (although these progressively larger), longitudinally elongate punctures appearing on posterolateral areas of third tergum and remaining terga ( Figs. 117–118); malar area with variable amounts of ivory coloration but with noticeable brown coloration, mandible predominantly brown; large blue-purple bees with some green coloration on face ( Figs. 117–118) [southeastern Brazil, northeastern Argentina, and southern Paraguay] ........................................................................... E. (E.) mandibularis Friese

3(1). Malar area twice as long as diameter of mid-flagellar articles ( Fig. 141); mesoscutellar tuft large, slightly wider than long, composed of yellow-fulvous setae; malar area and mandibles predominantly ivory colored ( Figs. 140–141); large bees with underlying integumental coloration green, strongly introgressed by red-coppery color in most parts of body and becoming dominant on metasoma (darker specimens, such as the holotype, have a rather red-bluish metasoma) ( Figs. 139–140) [western areas of Amazon Basin] ......... E. (E.) perfulgens Moure

—. Malar area roughly 1.25 times as long as diameter of mid-flagellar articles ( Fig. 122); mesoscutellar tuft noticeably longer than wide, composed of black setae ( Fig. 119); malar area with brown basal coloration and metallic highlights concolorous with other areas of face ( Fig. 122); mandible predominantly brown; large blue-purple bees with some green coloration on face ( Figs. 119–120, 122) [southwestern Brazil, northwestern Argentina, and southern Paraguay] ........................................................................... E. (E.) mandibularis Friese