Eufriesea engeli Gonzalez & Griswold, 2017

Gonzalez, Victor H., Griswold, Terry & Simoes, Marianna, 2017, On the identity of the adventive species of Eufriesea Cockerell in the USA: systematics and potential distribution of the coerulescens species group (Hymenoptera, Apidae), Journal of Hymenoptera Research 55, pp. 55-102 : 65-67

Eufriesea engeli Gonzalez & Griswold sp. n.

Male, Figs 5 , 16 , 17 , 26 , 100-105 , 106-111

Diagnosis.

This species is known only from the male sex. It along with E. micheneri and E. barthelli belong to a group of species that differs from other concolorous metallic blue to dark green Mexican Eufriesea by the anterior margin of metatibia in inner view without a distinct spine-like subapical projection above inner spur, but upper margin of distinctly depressed area projected medially, thus often appearing spine-like in profile (Figs 14-19 ) and the genitalia with dorsal lobe of gonostylus apically broad, distinctly setose on outer surface (Fig. 26 ). It can be separated from E. micheneri by the metabasitarsus broadly rounded posterodistally (angled in E. micheneri ), T2 with punctures separated by at most a puncture width on disc (punctures separated by 1-2 times a puncture width in E. micheneri ), and by the body color (largely metallic green in the male of E. engeli vs. dark blue with violet hues in both sexes of E. micheneri ). From E. barthelli it can be separated by the posterior felty patch of mesotibia, which is subapically broader than the distance between its medial margin and anterior margin of tibia (narrower in E. barthelli ), punctation of T2 (punctures coarser and nearly contiguous in E. engeli , finer and slightly sparser in E. barthelli ), and its geographical distribution ( E. engeli occurs in southern Mexico whereas E. barthelli in central Mexico).

Description.

Holotype, ♂: As described for E. barthelli except as follows: Head width 5.9 mm; body length 16.7 mm; intertegular distance 4.6 mm; forewing length 14.4 mm. Glossa in repose reaching S2. Hidden sterna and genitalia as in Figs 106-111 .

Gena mostly green. Mesosoma excluding legs predominantly green, with weak golden hues on mesoscutum anteriorly, disc of tegula and mesepisternum dorsally; weak bluish hues on axilla laterally, mesepisternum ventrally, and propodeum basal and laterally. Legs mostly blue-purple except green on pro- and mesotibiae anteriorly and metatibia basally. T1-T4 green except distal margins blue to purple; T5-T7 blue with purple marginal zones; sterna mainly green except S2 dark brown, with blue to purple hues on apical sterna.

Mesosoma with mostly off-white setae except gray to black setae on pronotum, posterior half of mesoscutum, mesoscutellum, mesepisternum ventrally, metepisternum, and propodeum. Legs with off-white setae, except gray to dark brown setae on inner surfaces of tibiae, basitarsi, and tarsi of all legs. Mesotibia with posterior patch subapically broader than distance between its medial margin and anterior margin of tibia.

Disc of T2 with coarser and denser punctures on disc than in E. barthelli , punctures separated by less than a puncture width to nearly contiguous.

Female. Unknown.

Holotype.

♂, Mexico: Chiapas, Sumidero Cnyn. [Canyon] Nat. [National] Pk. [Park]. vi-12-1991., B. Ratcliffe, J. Ashe, M. Jameson colls. // SM0504516, KUNHM-ENT. Deposited in SEMC.

Paratypes.

Eight males with the same data as the holotype and also deposited in SEMC, but with the following barcode label numbers: SM0504513-15, -17, -18, -20, -31, and 0748219.

Additional material.

(n = 7♂, not designated as paratypes) 1♂, Mexico: Chiapas, L.[Lago] Montebello , 20 v 1970, 1410, R.L. Dressler (FSCA) ; 5♂, Tuxtla Gutierrez, Chiapas , Mexico, C. Dodson, 7-21-1968, No. 310, Cineole (FSCA) ; 1♂, Mexico: Chis [Chiapas], Tuxtla Gutierrez , Cineole, C.H. Dodson, 310, 19-23 VII 1968 (FSCA) .

Etymology.

This species is dedicated to our friend and colleague Dr. Michael S. Engel (University of Kansas), in recognition of his significant contributions to systematic melittology.

Distribution.

(Fig. 128 ) This species is known only from Chiapas, southern Mexico, but can be expected to be found in Guatemala since Lago Montebello is on the border with Guatemala.

Comments.

In some paratypes the golden hues are more conspicuous on the face and mesoscutum and the subapical projection of the anterior surface of the metatibia is more acutely projected than the holotype. The tongue has been pulled out in all specimens, including the holotype, and thus it appears to surpass the apex of metasoma. The tongue length provided in the description is based on measuring the galea alone and confirmed by the Lago Montebello specimen where the tongue is in repose.

Figures

Figure 128. Collection localities for species of Eufriesea of the Eufriesea coerulescens group.

Figures 4 - 6. Male mesotibia. 4 E. barthelli (holotype) 5 E. engeli (paratype, KUNHM-ENT 0504531) 6 E. micheneri (paratype. Mexico: Jalisco, Mascota, KUNHM-ENT 1121713).

Figures 14 - 19. Detail of the subapical projection (indicated by an arrow) above the spurs of the male metatibia in anterior (14, 16, 18) and lateral views (15, 17, 19). 14, 15 E. barthelli (paratype. Mexico: Jalisco, Ajijic, KUNHM-ENT 0504535); 16, 17 E. engeli (paratype, KUNHM-ENT 0504531) 18, 19 E. micheneri (paratype. Mexico: Jalisco, Talpa, KUNHM-ENT 1121712).

Figures 20 - 26. Dorsal views of male mesoscutellum (20, 21) and second metasomal tergum (22, 23), and lateral views of the genital capsule (24) and dorsal (gsd) and ventral lobes (gsv) of the gonostylus (25, 26). Red box in Fig. 24 indicates detailed area in subsequent figures. 20 E. micheneri (paratype. Mexico: Jalisco, Talpa, KUNHM-ENT 1121712) 21, 23 - 25 E. oliveri (paratype. Mexico: Guerrero, EMEC 1069134, - 35) 22 E. coerulescens (lectotype) 26 E. engeli (paratype, KUNHM-ENT 0504531).

Figures 100 - 105. Male holotype of E. engeli (except paratype in Fig. 103, KUNHM-ENT 0504531). 100 Facial view 101 Dorsal habitus 102 Lateral habitus 103 Outer view of hind leg 104 Dorsal view of mesoscutellum 105 Second metasomal tergum.

Figures 106 - 111. Male terminalia of E. engeli (paratype, KUNHM-ENT 0504531). 106 Seventh metasomal sternum in ventral view 107, 108 Eighth metasomal sternum in ventral and lateral views 109 - 111 Genital capsule in dorsal, ventral, and lateral views.