Megalopta guimaraesi Santos and Silveira 2009
Creators: name: Santos, L. M.
name: Melo, G. A. R.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Halictidae
Megalopta
Megalopta guimaraesi

description: Megalopta guimaraesi Santos and Silveira, 2009
(Figures 1F, 2A, 3B, C, 7D, 9A, 15B)
Megalopta guimaraesi Santos and Silveira, 2009:10. Holotype female, Brazil: Minas Gerais, Jaboticatubas (DZMG, examined).
Additional examined material
(45♀, 8♂). See Appendix 2.
Diagnosis
The female differs from that of M. amoena by possessing in posterior upper margin of metepisternum a conspicuously large process covered with velvety pilosity; from M. chaperi by the longer basal area of metapostnotum, its length always longer than onethird of metanotum length (Figure 1F); from M. mura sp. n. by the mesoscutum, adjacent to parapsidial line, densely punctured (<1 pd), punctuation sparser in direction to mesoscutal lip (≥ 1 pd) (Figure 3B), scutellum with posterior margin levelled to anterior margin of metanotum (Figure 3C), and by basal area of metapostnotum uniformly metallic green (Figure 1F). The male differs from that of M. chaperi by the longer basal area of metapostnotum, its length always longer than onethird of metanotum length and by sparse pilosity in metanotum (Figure 7D); from M. amoena by F6–F11 wider than remaining flagellomeres (Figure 9A), basal area of metapostnotum with longitudinal rugulosities in mid portion (Figure 7D), S3 with a weakly impressed longitudinal sulcus, S4 lacking pilosity basally, its apical margin strongly notched laterally; from M. mura sp. n. by the sparse punctures (≥ 1 pd) in mesoscutum adjacent to parapsidial line.
Description
Female. (1) Mandible bidentate and with supplementary teeth. (2) Labral elevation sometimes with flattened surface. (3) Clypeus with surface between punctures on basal and central area variable, microreticulate or smooth. (4) Central portion of supraclypeal area with sparse punctation, punctures separated by ≥ 1 pd. (5) Antennae reddish brown. (6) Upper frons flat, not strongly declivous toward sulcus around median ocellus. (Figure 2A). (7) Ocellocular distance smaller than the F1 length. (8) Mesoscutum adjacent to the parapsidial line densely punctured (<1 pd), punctation sparser in direction to mesoscutal lip (≥ 1 pd) (Figure 3B). (9) Scutellum with posterior margin levelled in relation to anterior margin of metanotum (Figure 3C). (10) Metanotum with integument, in oblique view, not hidden by short plumose pilosity. (11) Basal area of metapostnotum* sometimes metallic green, its length up to 0.7× that of metanotum, with few slightly impressed longitudinal rugulosities (Figure 1F). (12) Mesepisternum with contiguous punctation. (13) Metepisternum with dense pilosity, integument not visible through pilosity, posterior upper margin modified into a conspicuously large process covered with velvety pilosity, its diameter at least 0.75× the tegula length. (14) T1 with dorsal surface of disc sparsely punctured (≥ 1 pd), posterior marginal zone smooth between punctures. Male. (15) Scape with diameter gradually enlarging toward the apex. (16) Flagellum reddish brown; F1–F11 differing in diameter, F6–F11 wider than remaining flagellomeres (Figure 9A); F2 about as long as F3; F6–F11, in anterior view, with the anterior and posterior margins depressed, in posterior view, basally with basal glabrous area at same level of remaining surface. (17) Metanotum with integument, in dorsal view, not hidden by short plumose pilosity. (18) Basal area of metapostnotum metallic green, its length up to 0.9× that of metanotum, with few longitudinal rugulosities restricted to central area (Figure 7D). (19) Metepisternum with very dense pilosity, the integument not visible through pilosity, posterior upper margin modified into a conspicuously large process covered with velvety pilosity, its diameter at least 0.75× the tegula length. (20) 1st and 2nd tarsomeres of foreleg with longest simple setae shorter than summed length of the three apical tarsomeres. (21) S3 with longitudinal sulcus slightly impressed, posterolateral margin slightly notched. (22) S4 with medial protruding process, profile of process triangular in lateral view; basal portion glabrous; posterolateral margin notched, notch not extending to basal half of sclerite.
Measurements
Approximate body length: (8.8–11.3); maximum width of head: (2.6–3.6) mm; intertegular distance: (2.7–3.8); length of forewing with the tegula: (8.8–10.6).
Comments
Specimens from eastern Brazil exhibit blackish integument, while those from central Brazil have a metallic green integument. However, one female from Camacan, Bahia, has a mostly black integument mixed green tints and one male from Rio de Janeiro is metallic green.
Distribution
BRAZIL. Bahia: Camacan, Rio de Contas, Distrito Federal. Goiás: Alto Paraíso de Goiás, Caldas Novas, Formosa, Jataí, Planaltina. Maranhão: Açailândia, Balsas, Caxias. Mato Grosso: Alto Araguaia. Mato Grosso do Sul: Costa Rica. Minas Gerais: Bocaiúva, Corinto, Marliéria, Morro da Garça, Paracatu, São Gonçalo do Rio Abaixo, Três Marias, Viçosa. Paraná: Campo Mourão. Rio de Janeiro: Rio de Janeiro. São Paulo: Alvinlândia, Bauru, Cananéia (Figure 15B).
description: Published as part of Santos, L. M. & Melo, G. A. R., 2014, Updating the taxonomy of the bee genus Megalopta (Hymenoptera: Apidae, Augochlorini) including revision of the Brazilian species, pp. 575-674 in Journal of Natural History 49 (11) on pages 610-612, DOI: 10.1080/00222933.2014.946106, http://zenodo.org/record/4004455