Euglossa (Glossurella) tibialis, 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 : 337-338

publication ID	https://doi.org/10.35249/rche.51.3.25.04
publication LSID	lsid:zoobank.org:pub:DE23BE8C-FB49-46C5-908C-05655BE0D05
DOI	https://doi.org/10.5281/zenodo.16975537
persistent identifier	https://treatment.plazi.org/id/241887F1-3D13-FFF4-D697-4892FBBAFA26
treatment provided by	Felipe
scientific name	Euglossa (Glossurella) tibialis
status	sp. nov.

Treatment

Euglossa (Glossurella) tibialis sp. nov.

( Figs. 6 View Figure 6 A-D)

Type material. Holotype. Male , with the following data: “RO-6629, Brasil, Rondônia, Cujubim, Linha 14, 24-mar-97, 09°20.154’S / 62°33.110’W, Brown, Boina, Vieira , no.” ( INPA). GoogleMaps

Diagnosis. Male. Midtibiae short and inflated, anterior tuft elliptic, the posterior smaller and elliptic, velvet area very expanded posteriorly, SII with two semicircular depressions each with diagonal tufts of hairs.

Description. Measurements: Total length 9 mm, length of labiomaxillary complex more than three times eye length. Morphology: Labrum subquadrate, almost as wide as long, with median keel, mandible tridentate, clypeal disc tricarinate, with medial carina strong and smooth ( Fig. 6a View Figure 6 ), mandible tridentata, length of labiomaxillary complex surpassing the end of metassoma ( Fig. 6c View Figure 6 ), scutellum short and slightly rounded behind, corresponding lees the half its width, without medial depression, slightly flat above ( Fig. 6b View Figure 6 ), midtibiae short and inflated, anterior tuft elliptic, the posterior smaller and elliptic, velvet area very expanded posteriorly ( Fig. 6d View Figure 6 ), hindtibiae subtriangular and inflated ( Fig. 6c View Figure 6 ), SII with two semicircular depression each with diagonal tufts of hairs. Color: Clypeal disc and supraclypeal area metallic green dyed with golden reflections, clypeal disc with a brown medial carina, ivory paraocular stripes complete reaching the malar areaand a little enlarged below, forward side of the antennal scape almost entirely ivory ( Fig. 6a View Figure 6 ), head, torax, legs, and metassoma metallic green dyed with golden reflections ( Figs. 6b, c View Figure 6 ). Pilosity: Face, gena, mesepisternum, legs, and terga predominantly white, vertex, scutum, and scutellum black, pronotal lobes mixed black and with. Punctation: Clypeal disc very dense, irregular, large, and horizontal, lower paraocular areas less dense, large, and superficial, supraclypeal area very dense, large, and irregular, near ocelli very dense and small ( Fig. 6a View Figure 6 ), tegulae and mesoscutum less dense and with small punctures, scutellum sparse and small to medium, mesepisternum less dense with medium-sized and deep punctures, external face of hindtibiae sparse and beveled, TI-IV very dense and with micropunctures, V-VII very dense, beveled, large and irregular.

Female. Unknown.

Geographic records. BRAZIL: Rondônia.

Etymology. A reference to the short and inflated midtibiae.

Bait. Unknown.

Comments. According to Hinojosa-DÍaz et al. (2012) when Dressler (1982) created this subgenus, he included several species that shared some biological (such as nesting) and morphological aspects, but currently, phylogenetic analyses, both morphological and molecular, suggest that this group would not be monophyletic. Even so, they still maintain, albeit provisionally, this subgenus only with Eg. bursigera Moure, 1970 , Eg. augaspis Dressler, 1982 , E. prasina Dressler, 1982 , Eg. adiastola Hinojosa-DÍaz, Nemézio & Engel, 2012, and E. embera Hinojosa-DÍaz, Nemésio & Engel, 2012.

Euglossa tibialis shares the following characteristics with this subgenus: anterior midtibial tuft entire, posterior tuft subequal to anterior, smaller or quite lacking, sometimes divided into two lobes, hindtibia triangular, three teeth, sternal pockets semicircular depressions or quite lacking”. It is similar to Eg. adiastola in relation to the midtibial tufts but differing due mainly to the short and greatly inflated midtibiae, besides the less intense integumentary shine, scutellum almost straight behind, and velvety area expanded posteriorly.

This species shows the following characteristics presented by Hinojosa-DÍaz et al. (2012) for the species of this subgenus: shape of metatibia trapezoidal (posterior angle orthogonal) and inflated, shape of scape cylindrical, length of labiomaxillary complex clearly surpassing tip of metasoma (by about half a metasomal segment length), malar length about 1/3 width of mid-flagellomeres, 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.