Euglossa (Glossurodes) rotundata, de Oliveira, 2025

de Oliveira, Marcio Luiz, 2025, A dozen of new species of orchid bees (Hymenoptera: Euglossini) from Brazil and Ecuador, Revista Chilena de Entomología 51 (3), pp. 321-342 : 336-337

Euglossa (Glossurodes) rotundata sp. nov.

( Figs. 5 E-H)

Type material. Holotype. Male , with the following data: “ Brasil, Amazonas, Pq. [Parque] Nac. [ional] P. [ico] Neblina, Serra do Imeri, 0°10’20”S / 65°23’41”W, 50m, 11h, salicilato, 12/out/2005, R. L. Dias ” ( INPA).

Diagnosis. Male. Anterior tuft deltoid, the posterior smaller and elliptic, hindtibiae triangular and depressed, scutellum long, elevated, and well-rounded posteriorly.

Description. Measurements: Total length 10 mm, length of labiomaxillary complex almost 2,5 times eye length. Morphology: Labrum subquadrate, wider than long, with median keel, mandible bidentate, clypeal disc tricarinate ( Fig. 5e ), length of labiomaxillary complex perpassing the end of metassoma ( Fig. 5g ), scutellum long and well-rounded behind, corresponding to half its width, with faint median depression, convex above ( Fig. 5f ), midtibiae with anterior tuft deltoid, the posterior smaller and elliptic ( Fig. 5g ), hindtibiae subtriangular and depressed posteriorly ( Fig. 5g ), SII with small, widely separated tufts. Color: Clypeal disc predominatly blue, ivory paraocular stripes complete, reaching the malar area and wider below, forward side of the antennal scape almost covering the scape ( Fig. 5e ), torax and fore and midleg mettallisc green, side of abdome and hindlegs mettalic green with golden reflections ( Figs. 5f, g ). Pilosity: Face, gena, and legs white, vertex, pronotal lobes, scutum, and scutellum black mixed with white. Punctation: Clypeal disc dense, medium to large, and irregular, lower paraocular areas less dense and superficial, near ocelli strongly dense and with small punctures ( Fig. 5e ), mesoscutum and tegulae less dense and with small punctures, scutellum sparse and with medium punctures, mesepisternum sparse with medium-sized and deep punctures, external face of hindtibiae dense, irregular, superficial with small to medium, and beveled punctures posteriorly, TI-IV very dense and with micropunctures, V-VI very dense and beveled, VII dense, large and irregular.

Female. Unknown.

Geographic records. BRAZIL: Amazonas.

Etymology. A reference to scutellum well-rounded posteriorly.

Bait. Methyl salycilate.

Comments. This species becomes part of the group Eg. (Glossurodes) stellfeldi species group, the unique group sheltered in this subgenus, together with Eg. stellfeldi Moure, 1947 and Eg. annectans Dressler, 1982 . This group shares the following features, according to Engel (2021): similar to subgenus Glossura , but the labiomaxillary complex is at most about as long as the body, not exceeding the metasomal apex as it does in Glossura . The transverse frontal ridge demarcating the upper bound of the supratorular depression lacking (present in Glossura as a weak or strong ridge or zig-zagged impunctate line between change in coarse punctation at this point), the inner and outer rami of the metapretarsal claws separated by a largely V-shaped space, although the outer border of the V is arched, rather than the typical broad U-shaped separation in Glossura (as well as in its synonym Glossuropoda). The mediolongitudinal furrow of the mesoscutellum shallow and the surface on either side comparatively low, rather than the more distinctly impressed furrow and somewhat biconvex, or even bigibbous, surface in Glossura . Euglossa rotundata sp. nov. differs of the other two species in the size (10 mm), Eg. annectans (12 mm), and Eg. stellfeldi (12 mm); in color (golden green), Eg. annectans (green), and Eg. stellfeldi (blue green); in the anterior midtibial tuft (smaller and longlinear), Eg. annectans and Eg. stellfeldi (larger and elliptical), and scutellum (broadly rounded at its posterior edge), Eg. annectans (little rounded), and in Eg. stelffeldi (straight).

Figures

Figure 5. Holotype of Euglossa (Euglossa) pumilia sp. nov. A. Head, frontal view. B. Dorsal habitus. C. Lateral habitus. D. Mesotibia. Holotype of Euglossa (Glossurella) rotundata sp. nov. E. Head, frontal view. F. Dorsal habitus. G. Lateral habitus. H. Mesotibia. / Figura 5. Holotipo de Euglossa (Euglossa) pumilia sp. nov. A. Cabeza, vista frontal. B. Hábito dorsal. C. Hábito lateral. D. Mesotibia. Holotipo de Euglossa (Glossurella) rotundata sp. nov. E. Cabeza, vista frontal. F. Hábito dorsal. G. Hábito lateral. H. Mesotibia.