Euglossa (Euglossella) urarina, Hinojosa-Diaz & Engel, 2007

Hinojosa-Diaz, Ismael A. & Engel, Michael S., 2007, Two new orchid bees of the subgenus Euglossella from Peru (Hymenoptera: Apidae), Beiträge Zur Entomologie = Contributions to Entomology 57 (1), pp. 93-104 : 100-103

Euglossa (Euglossella) urarina , sp. n. ( Figs 13 - 22)

Diagnosis:

Head integument metallic, dark green with bronzy-golden highlights, mesosoma metallic green with dense fulvous setae; legs brown, yellow-amber on two proximal podites; metasoma metallic, golden olive-green, first metasomal tergum and anterior half of second metasomal tergum yellow. Lateral lobes of posterior section of eighth metasomal sternum of male with lateral edge straight; posterior invagination of seventh metasomal sternum forming an incision with sides converging in orthogonal angle; incision between posterior and dorsal processes of gonocoxite forming an orthogonal angle with posterior edge of dorsal process; gonostylus with a prominent secondary “hump” dorsal to main thumb-like projection.

Description:

: Structure. Total body length 12 mm. Labiomaxillary complex at least reaching metasomal apex in repose ( Fig. 14 ). Head length 3.15 mm, width 4.77 mm (4.96 mm); upper interorbital distance 2.31 mm (2.38 mm); lower interorbital distance 2.08 mm (2.12 mm); upper clypeal width 1.09 mm (1.13 mm); lower clypeal width 1.98 mm (2.05 mm); clypeal protuberance 0.62 mm; clypeal ridges as in E. cosmodora ; labrum square (length and width 1.15 mm); labral ridges and windows as in E. cosmodora ; interocellar distance 0.29 mm; ocellocular distance 0.69 mm (0.72 mm); first flagellar article [0.43 mm (0.51 mm)] equal to combined lengths of second and third flagellar articles [0.43 mm (0.51 mm)]; length of malar area 0.15 mm. Mandibular dentition as in E. cosmodora . Pronotal lateral angle acute; intertegular distance 3.45 mm (3.63 mm); mesoscutal length 2.62 mm (2.76); mesoscutellar length 1.38 mm; posterior border of mesoscutellum evenly convex ( Fig. 15 ); mesotibial length 2.44 mm; mesobasitarsal length 2.58 mm, width 0.73 mm; metatibia triangular, maximum thickness 1.13 mm; metatibial anterior border length 3.64 mm, ventral border length 1.82 mm, dorso-posterior border length 4.25 mm, not noticeably divided in two sections by dorsal section of metatibial organ slit; metatibial ventro-posterior angle semi-acute; metatibial organ slit dorsal as in E. cosmodora , except maximum width occupying about one-fourth of metatibial outer surface width, and dorsal section length 0.69 mm ( Fig. 17 ); metabasitarsal length 2.36 mm (2.69 mm), mid-width 0.84 mm (0.91 mm); metabasitarsal ventral border and pretarsal claws as in E. cosmodora . Forewing length 9.46 mm (10 mm); jugal comb with 13–15 blades; hind wing with 21–23 hamuli. Maximum metasomal width 4.77 mm (4.92 mm); second metasomal sternum evenly protuberant mesaly, not excavated.

Coloration. Head mainly metallic dark green (except as described below), with bronzy-golden highlights specially on interantennal area and antennal depressions; clypeal ridges and edges brown, brown on anterior half of vertex and narrow genal streak bordering compound eye; paraocular ivory marks as in E. cosmodora , except lower width equals three quarters of length of lower lateral parts of clypeus; lower lateral parts of clypeus, labrum, malar area and mandibles as in E. cosmodora ; antenna brown; scape with ivory spot covering most of anterior surface ( Fig. 13 ). Most of mesosoma metallic green with strong bronzy highlights (particularly on center of mesoscutum); anterior half of prothorax and anterior flattened sections of mesepisternum brown; posterior two thirds of mesoscutellum amber ( Figs 14 - 15 ); legs brown, yellow-amber on two proximal podites; pretarsal claws slightly lighter, distal half dark brown; faint bronzy-green highlights on all legs specially on proximal podites ( Figs 14, 16 - 17 ). First metasomal tergum amber-yellow mesally, lateral edges and posterior narrow streak brown; second metasomal tergum similar to first but with a broad metallic olive-green, golden posterior band; third through sixth metasomal terga brown with posterior golden, olive-green band; seventh metasomal tergum brown not banded; posterior border of second through sixth metasomal terga slightly translucent ( Figs 14- 15 ). First and second metasomal sterna yellowish; remaining sterna brown, mesally with posterior sections translucent.

Sculpturing .. Head sculpturing basically as described for E. cosmodoracosmodora except smooth areas of vertex restricted to nearest area around ocelli. Mesosoma (including legs) and metasoma as in E. cosmodora .

Vestiture. Head vestiture as in E. cosmodora . Mesosoma basically as in E. cosmodoracosmodora except slightly lighter coloration of all setae and other notations as follows: mesotibial tufts made of light fulvous setae; anterior tuft rhomboid, about half as long as velvety area, posterior tuft ovoid, about onefourth as long as major axis of anterior tuft ( Fig. 16 ); mesobasitarsus with three wavy setae (no secondary wavy setae evident); setae on metatibial outer surface light otherwise as in E. cosmodora ; metatibial organ slit closed with fulvous setae, becoming brown on dorsal section ( Fig. 17 ). Metasomal vestiture as in E. cosmodora .

Terminalia . Posterior margin of seventh metasomal sternum invaginated mesally, forming a moderately deep incision with converging sides forming an almost orthogonal angle, lateral sections with a noticeable protuberance; apical setae on invaginated section as long as mesal length of sternum ( Fig. 18 ). Eighth metasomal sternum as in E. cosmodora , except for lateral lobes of posterior section with lateral edge straight ( Fig. 19 ). Anterior-most section of gonobase just slightly projected ventrally (not bent) ( Fig. 20 ). Gonocoxite as in E. cosmodora , except for incision between posterior and dorsal processes forming an orthogonal angle with posterior edge of dorsal process ( Fig. 21 ). Gonostylus with a prominent secondary “hump” dorsal to main thumb-like projection (Fig. 22).

: Unknown.

Variation:

The specimen designated as paratype, besides the variation in measurements noted in parentheses in the description, has a slightly darker coloration, both in integument and vestiture.

Type material:

Holotype ( Figs 14 - 15 ): , labeled, “Iquitos Peru // 8 Sept 64; C H Dodson // On Gongora maculatamaculata 2734 // E. decorata Smith ” [first three labels handwritten]. The holotype is in the Florida Museum of Natural History , University of Florida, USA. The holotype has the labiomaxillary complex incomplete (the main part of it, as shown in Fig. 14 , fell off the specimen), hyphae covering the head and parts of the mesosoma and metasoma . Paratype: , labeled, “Iquitos Peru // H Moore [unintelligible handwriting] // Gon. maculata ” [all labels handwritten]. The paratype is deposited in the Division of Entomology , University of Kansas Natural History Museum, Lawrence, Kansas, USA. The paratype is missing the right antenna (scape and pedicel glued to a point), left foreleg, and tibia and tarsomeres of midleg. Although the head of the paratype and right midleg are glued to the mesosoma (representing repair of some disarticulation in the past by an unknown individual), we are confident that both are correctly associated with the specimen .

Etymology:

The specific epithet is a reference to the Urarina, indigenous people inhabiting the Peruvian Amazon in Loreto Department and where the type material was collected. The name is treated as a noun in apposition .

Floral records:

Holotype and paratype bear labels referring to the plant where they were presumably collected, this being Gongora maculata LINDL. (Orchidaceae) for both. The holotype specimen has, attached to the posterior edge of the mesoscutellum, a complete pollinium and remnants of another, both belonging to orchids of the genus GongoraGongora (R. L. DRESSLER,, pers. com.) ( Fig. 15 ).

Figures

Figs 13 - 17: EuglossaEuglossa (Euglossella) urarina sp. n., male holotype. – 13 facial aspect. – 14 lateral habitus. – 15 dorsal habitus. – 16 outer surface of mesotibia. – 17 outer surface of metatibia.

Figs 18 -21: EuglossaEuglossa (Euglossella) urarinaurarina sp. n., male holotype. – 18 seventh metasomal sternum, ventral aspect. – 19 eighth metasomal sternum, dorsal aspect. – 20 lateral aspect of genitalic capsule (penis valves and aedeagus omitted as they do not differ from E. cosmodora). – 21 dorsal aspect of genitalic capsule (penis valves, aedeagus, and ventral aspect omitted as they do not differ from E. cosmodora). – 22 detail of gonostylus, lateral aspect. Scale bars = 1.0 mm except that for figure 22 is 0.25 mm.