Euglossa (Euglossella) celiae Hinojosa-Díaz & Engel, 2014

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 36, pp. 1-108 : 31-34

Euglossa (Euglossella) celiae Hinojosa-Díaz & Engel , new species

ZooBank: urn:lsid:zoobank.org:act:1DF48070-92B8-4FD8-84A7-5B80567A205E

( Figs. 29–37 , 146 , 156 , 170 )

DIAGNOSIS: Labiomaxillary complex in repose reaching posterior half of second metasomal sternum; upper and lower interorbital distances equal (marginally different) ( Fig. 31 ); malar area short (less than 0.25 mm, noticeably shorter than diameter of mid-flagellar articles) ( Fig. 31 ); pronotal dorsolateral angle projected as a lamella; male mesotibial tufts as follows: anterior tuft rhomboid, moderately long (maximum length barely exceeding mid-width of velvety area) and narrow (mid-width equivalent to width of contiguous section of velvety area), posterior tuft circular-ovoid ( Figs. 32 , 146 ); mesobasitarsal posterior keel projected as a right to slightly obtuse angle ( Fig. 34 ); second metasomal sternum with two simple meso-lateral tufts; width of metasoma and head only marginally different (less than 1.05 times) ( Fig. 29 ); head mainly green with some light blue areas ( Fig. 31 ); paraocular marks trapezoidal, lower width not exceeding half length of lower lateral part of clypeus ( Figs. 30–31 ); scape with ivory spot covering almost entire anterior surface ( Fig. 31 ); mesosoma green throughout with noticeable golden-bronzy iridescence ( Figs. 29–30 ), mesoscutellum with faint cyan intergradation ( Fig. 36 ); first to third metasomal terga light cyan, remaining terga green with noticeable golden-bronzy hue ( Fig. 37 ); mesoscutellum moderately punctate (punctures separated by one to two puncture diameters) ( Fig. 36 ); central area of mesepisternum moderately punctate (punctures separated by one and a half puncture diameters) ( Fig. 35 ); metasomal terga densely and evenly imbricate-punctate ( Fig. 37 ); mesosomal vestiture dominated by pale-fuscous setae ( Figs. 29–30 , 35–36 ); eighth metasomal sternum posterior section very narrow as a slender cylinder; gonocoxite dorsal process about as wide as long ( Fig. 156 ); gonostylar lateral section with well-developed “secondary” lobe, almost as long as adjacent ventral lobe, covered with dense setae reaching posterior margin of blades of penis valve.

DESCRIPTION: ♂: Structure. Total body length 10.12 mm (9.26–11.11; n=6); labiomaxillary complex in repose reaching posterior half of second metasomal sternum ( Figs. 29–30 ). Head length 2.49 mm (2.37–2.59; n=6), width 4.31 mm (4.15–4.50; n=6); upper interorbital distance 1.95 mm (1.85–2.00; n=6); lower interorbital distance 1.90 mm (1.81–1.94; n=6); upper clypeal width 1.07 mm (1.00–1.11; n=6); lower clypeal width 1.76 mm (1.70–1.78; n=6); clypeal protuberance 0.54 mm (0.48–0.59; n=6); clypeal ridges, labral ridges, and labral windows as described for E. viridis ; labrum wider than long, length 0.86 mm (0.81–0.89; n=6), width 1.02 mm (1.00–1.07; n=6) ( Fig. 31 ); interocellar distance 0.32 mm (0.30–0.33; n=6); ocellocular distance 0.56 mm (0.52–0.59; n=6); first flagellar article longer [0.55 mm (0.52–0.59; n=6)] than second and third flagellar articles combined (0.37 mm; n=6); length of malar area 0.15 mm (n=6). Mandible tridentate. Pronotal dorsolateral angle projected posterolaterally as a truncate lamella; intertegular distance 3.14 mm (2.96–3.41; n=6); mesoscutal length 2.55 mm (2.44–2.67; n=6); mesoscutellar length 1.16 mm (1.10–1.22; n=6); posterior margin of mesoscutellum truncate along most of its length (laterally rounded) ( Fig. 36 ); mesotibial length 2.09 mm (2.04–2.22; n=6); mesobasitarsal length 2.12 mm (2.04–2.22; n=6), width 0.69 mm (0.65–0.74; n=6) (measured at proximal posterior keel), posterior keel projected in a right to slightly obtuse angle with proximal margin (between mesotibia-mesobasitarsus joint and apex of keel) appearing slightly convex ( Fig. 34 ); metatibia triangular (scalene triangular) ( Fig. 33 ), maximum thickness 1.24 mm (1.11–1.30; n=6); metatibial anterior margin length 3.31 mm (3.11–3.41; n=6), ventral margin length 2.23 mm (2.07– 2.37; n=6), postero-dorsal margin length 4.29 mm (3.93–4.59; n=6); metatibial organ slit as described for E. viridis , dorsal section length 0.53 mm (0.52–0.56; n=6); metabasitarsal length 2.06 mm (2.00–2.15; n=6), mid-width 0.76 mm (0.74–0.78; n=6); metabasitarsal ventral border truncate. Forewing length 8.41 mm (8.15–8.81; n=6); jugal comb with 12–14 (n=6) blades; hind wing with 17–22 (n=6) hamuli. Maximum metasomal width 4.31 mm (4.07–4.59; n=6); second metasomal sternum as described for E. viridis .

Coloration. Head as described for E. viridis , except as follows: metallic blue areas lighter than in most specimens of E. viridis , blue area on vertex restricted to ocellar triangle; lower width of paraocular ivory marks never wider than half length of lower lateral part of clypeus ( Figs. 30–31 ). Mesosoma green throughout, with golden-bronze noticeably on lateral areas, mesoscutellum with some faint cyan intergradation ( Figs. 29–30 , 35–36 ); legs as described for E. viridis , except mainly green with no blue-purple iridescence ( Figs. 30 , 33 ). First to third metasomal terga light cyan on dorsum, lateral sections green, fourth to seventh terga green with golden-bronzy hue, remainder of metasoma as described for E. viridis ( Fig. 37 ).

Sculpturing. Head as described for E. viridis ( Fig. 31 ). Mesosoma as described for E. azurea , except mesepisternal lateral areas with punctures slightly denser ( Fig. 35 ). Metasoma as described for E. viridis ( Fig. 37 ).

Vestiture. Head as described for E. viridis ( Fig. 31 ). Mesosoma (including legs) as described for E. viridis ( Figs. 29–30 , 33, 35–36 ), except mesotibial anterior tuft moderately long (length barely exceeding mid-width of velvety area) and narrow (mid-width as wide as contiguous section of velvety area) ( Figs. 32 , 146 ). Metasoma as described for E. viridis ( Fig. 37 ).

Terminalia. Hidden sterna and genital capsule as described for E. viridis ( Fig. 156 ).

♀: Unknown.

HOLOTYPE: ♂, Colombia: “ Colombia ; Amazonas; Leticia; 6 VI 1974; 1551 // Vanillin; R. L. Dressler ” ( FSCA).

PARATYPES (6♂♂): Ecuador : 3♂♂, “ECUADOR, Napo; September 1987; Dressler, Hills,; Whitten, Williams // anisyl acetate” (two in FSCA, one in SEMC) . 2♂♂, “ECUADOR: Napo Prov.; Jatun Sacha Biol.; Sta., 23 km. E. Puerto ; Napo, 15-18-X-1988; S. Dunkle // Euglossa ; viridis (Perty) ; det. R. L.Dressler,1989” ( FSCA) . 1♂, “ Euglossa perviridis ; Rio Tapiche II; Peru; S 5°51’5.10”; W 74°0’3.33”; leg./det.; P. Gettleuber ; 8/3/2008 349a” ( MUSM) .

ETYMOLOGY: The specific epithet is a matronym honoring the late Celia Díaz Díaz, mother of the senior author.

COMMENTS: Individuals of this species share features with both E. viridis and E. azurea , although the combination of characters observed diagnose them clearly as a distinct species. In terms of coloration, males (the only gender known) of E. celiae have cyan on areas that would be blue-purple in E. viridis , a more noticeable green coloration throughout, and narrower paraocular lines ( Figs. 29–31 ). Puncture density on the mesepisternum is comparable to E. azurea . The mesotibial anterior tuft in E. celiae is intermediate when compared to E. viridis and E. azurea , and it is distinguishable by having a mid-width comparable to that of the contiguous velvety area ( Fig. 146 ), while in the other two species the contiguous velvety area is either noticeably narrower ( Fig. 144 ) or wider ( Fig. 145 ). The species is known at present from only a few specimens from the western areas of the Amazon Basin in Colombia, Ecuador, and Peru ( Fig. 170 ), although it must certainly occur in nearby areas of Brazil.

Figures

Figure 170. Collection localities for species of Euglossella Moure, viridis and mandibularis species groups [also showing localities for females attributable only to Euglossa (Euglossella) viridis (Perty)/azurea Ducke]. Locality points are based on examined specimens.

Figures 29–30. Euglossa (Euglossella) celiae, new species, male holotype. 29. Dorsal habitus. 30. Lateral habitus.

Figures 31–37. Euglossa (Euglossella) celiae, new species, male holotype. 31. Facial aspect. 32. Meso- tibial tufts. 33. Outer view of hind leg. 34. Proximal section of mesobasitarsus. 35. Lateral part of mesepisternum. 36. Mesoscutellum. 37. Dorsal view of metasomal terga.

Figures 144–154. Outer view of mesotibiae of males of species of Euglossella Moure, viridis and mandibularis species groups. 144. Euglossa (Euglossella) viridis (Perty). 145. E. (E.) azurea Ducke. 146. E. (E.) celiae, new species. 147. E. (E.) cyanea Friese. 148. E. (E.) subandina, new species. 149. E. (E.) polita Ducke. 150. E. (E.) perviridis Dressler. 151. E. (E.) cyanura Cockerell. 152. E. (E.) granti Cheesman. 153. E. (E.) mandibularis Friese. 154. E. (E.) bigibba Dressler.

Figures 155–163. Dorsal view of genital capsule of males of Euglossella Moure, viridis and mandibularis species groups. 155. Euglossa (Euglossella) azurea Ducke. 156. E. (E.) celiae, new species. 157. E. (E.) cyanea Friese. 158. E. (E.) subandina, new species. 159. E. (E.) polita Ducke. 160. E. (E.) perviridis Dressler. 161. E. (E.) cyanura Cockerell. 162. E. (E.) granti Cheesman. 163. E. (E.) bigibba Dressler.