Euglossa (Glossurella) trinodonta, 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 : 338-339

Euglossa (Glossurella) trinodonta sp. nov.

( Figs. 6 E-H)

Type material. Holotype. Male , with the following data: “ Brasil, Amazonas, BR 174 , Km 70, Data 12.08.86, col. H. Powell, 16, Proj. DBFF.WWF, Res: 3209 [59W 53’ 49”/2S 25’ 22”], Euglossa viridifrons Dressler, Det. R. Dressler, 1987 ” ( INPA) . Paratypes. 1 male from Brasil, AM , Manaus , PDBFF , 11/9/89, M.L. Oliveira, 2 males from Brasil, AM , Tefé , Praia do Camaleão, 13/11/88, eugenol, 28/11/88, sal. [icilato] de metila M.L. de Oliveira ( INPA) .

Diagnosis. Male. Face entirely green with brown carinae, ivory paraocular stripes absent, forward side of the antennal scape with a small ivory spot, length of labiomaxillary complex perpassing the metassoma tip, mandibles tridentate, anterior midtibial tuft elliptic and appendiculate, the posterior absent, hindtibiae triangular, SII without two semicircular depressions with diagonal tufts of hairs.

Description. Measurements: Total length 10 mm, length of labiomaxillary complex more than four times eye length. Morphology: Mandible tridentate, labrum subquadrate, almost as wide as long, with three keels, clypeal disc tricarinate, medial carina strong and smooth ( Fig. 6e ), length of labiomaxillary complex surpassing the end of metassoma ( Fig. 6g ), scutellum short and slightly rounded behind, corresponding to the half its width, with median depression, elevated above ( Fig. 6f ), anterior midtibial tuft elliptic and appendiculate, the posterior absent ( Fig. 6h ), hinddtibiae triangular and inflated ( Fig. 6g ), SII without two semicircular depressions with diagonal tufts of hairs. Color: Face entirely green with brown carinae, ivory paraocular stripes absent, forward side of the antennal scape with a small ivory spot ( Fig. 6e ), rest of body mirror-like metallic green. Pilosity: Clypeous, vertex, mesoscutum, and scutellum black, lower paraocular areas, gena, mesepisternum, legs, and metassoma white, pronotal lobes and metepisternum white and black mixed. Punctation: Clypeal disc very dense, irregular, medium, and deep, lower paraocular areas sparse, large, and deep, supraclypeal area very dense, medium, and irregular, front of ocelli very dense and small, tegulae and mesoscutum dense and with small punctures, scutellum sparse, small to medium and beveled, mesepisternum less dense, regular and with small and deep punctures, external face of the hindtibiae sparse and small at base, practically absent on rest, TII-VI very dense and with micropunctures, VII less dense, medium, irregular and superficial.

Female. Unknown.

Geographic records. BRAZIL: Amazonas.

Etymology. A reference to the mandibles with three teeth.

Bait. Cineole.

Comments. This species shares many features with Eg. viridifrons Dressler, 1982 that belongs to the subgenus Glossura , most specifically to the Euglossa (Glossura) allosticta species-group. But differing by the mandibles with three teeth. This species shows the following characteristics presented by Hinojosa-DÍaz et al. (2012) for the species of this subgenus: shape of metatibia triangular (posterior angle acute), shape of scape cylindrical, length of labiomaxillary complex clearly surpassing tip of metasoma (by about half a metasomal segment length), malar length equal the entire width of mid-flagelomere, separation of tip of metatibial organ slit from ventral margin of metatibia slightly over maximum width of organ slit, midmandibular tooth minute, adjacent to outer tooth, and known distribution only Amazon Basin.

Figures

Figure 6. Holotype of Euglossa (Glossurella) tibialis sp. nov. A. Head, frontal view. B. Dorsal habitus. C. Lateral habitus. D. Mesotibia. Holotype of Euglossa (Glossurella) trinodonta sp. nov. E. Head, frontal view. F. Dorsal habitus. G. Lateral habitus. H. Mesotibia. / Figura 6. Holotipo de Euglossa (Glossurella) tibialis sp. nov. A. Cabeza, vista frontal. B. Hábito dorsal. C. Hábito lateral. D. Mesotibia. Holotipo de Euglossa (Glossurella) trinodonta sp. nov. E. Cabeza, vista frontal. F. Hábito dorsal. G. Hábito lateral. H. Mesotibia.