♂, with the following data: “Euglossini do PERD, Pq. E. Rio Doce, 3859-11105” and “Marliéria, MG, Brasil, 04/07/1999, A. Nemésio” (UFMG). Details of the type locality are: Parque Estadual do Rio Doce (19°43'S, 42°34'W; 200 m a.s.l.), in the municipality of Marliéria, state of Minas Gerais, southeastern Brazil.

3♂♂, with the following label data: “Euglossini do PERD, Pq. E. Rio Doce, 3859-11106” and “Marliéria, MG, Brasil, 04/07/1999, A. Nemésio”; “idem, 3872-11131” and “idem” (UFMG); “idem, 3876-11137” and “idem” (UFMG). 1♂, “Brazil, E. Santo, No. Linhares, 12.xi.1968, R.L. Dressler” (FMNH). 1♂, “Brazil, Bahia, Res. Mte. Pascoal, 8.xi.1968, R.L. Dressler” (FMNH). 1♂, “Brazil, E. Santo, Conceicao da Barra, 10.xi.1968, R.L. Dressler” (FMNH). 1♂, “Brazil, Bahia, Itabuna, 19.vi.1971, H. Kennedy, cineole” (SEMC). 1♂, “Brazil, Bahia, Itabuna, 6.xi.1968, R.L. Dressler” (SEMC).

Euglossa clausi can be distinguished readily from both Euglossa crassipunctata and Euglossa sapphirina owing to its larger size (ca. 15% larger than both species), and a combination of integumental coloration that exactly matches neither of the aforementioned species (and for this reason has been confused with both: vide Nemésio 2009: 85–87). The paraocular ivory markings in Euglossa clausi are wider below (Fig. 3) than in both Euglossa crassipunctata and Euglossa sapphirina. The metatibia and sterna (Figs 1, 6) are blue, contrasting the otherwise green metasoma, a color combination not found in Euglossa crassipunctata (green metasoma, including the sterna, and metatibia) and Euglossa sapphirina (blue throughout). The apical setae of S7 of Euglossa clausi are distributed throughout the invaginated section and the posterolateral projections of the anterior section of S8 angled but not prominent, instead being more strongly developed in Euglossa moratoi (Figs 7, 8), as is the development of the basolateral projections of the posterior section. The gonostylus of Euglossa clausi is more straight or even slightly downcurved (Figs 9–11), relative to that of Euglossa moratoi (Figs 23–25), and both differ from the terminalia of Euglossa crassipunctata (Figs 12–15).

♂: Body length ca. 10.0 mm; forewing length ca. 7.7 mm; head width 4.4 mm; interorbital distance at level of antennal sockets 2.5 mm; maximum interorbital distance 2.7 mm; labiomaxillary complex in repose reaching tip of body; scape length 0.8 mm; compound eye length 2.7 mm; mesoscutellum width 2.5 mm, length 1.2 mm; abdominal width 4.2 mm.

Coloration and vestiture: Clypeus and upper frons dark blue, remainder of head greenish-blue (Fig. 3); ivory paraocular markings well developed, reaching malar area, wider below; anterior surface of antennal scape black with very minute ivory marking in some specimens (including holotype); mesoscutum, mesoscutellum, and metasoma bluish-green (Figs 1, 2). Wing membranes lightly infumate. Pubescence very sparse, predominantly fulvous setae on metasoma and around antennal sockets, black and fulvous setae on mesosoma, black setae especially on mesoscutum (compared to predominantly fulvous setae in Euglossa moratoi). Protibia and probasitarsus fringed with dense fulvous setae; velvet area occupying all ventral surface of mesotibia, posterior mesotibial tuft approximately one-third size of anterior tuft, almost an isosceles triangle in shape, merging with anterior tuft; anterior mesotibial tuft oval, about three times larger than posterior tuft (Figs 4, 5); metatibia oblong-rhomboid, inflated (Fig. 6).

Punctation: Mesoscutum with punctation separated by a puncture width or less, with large circular punctures; punctures on mesoscutellum sparser than on mesoscutum medioposteriorly, separated there by a puncture width or greater, with larger circular punctures. Punctation on discal base of T1 with large circular punctures of roughly same size more clearly defined medially than in other species and separated by less than a puncture width; punctures of T1–T6 dense, comprised of minute circular punctures; punctures on T7 sparser than on preceding terga, with large circular punctures; S2 with small, widely-separated tufts.

Terminalia: Male terminalia as in figures 7–11. S7 slightly invaginated mesally, forming a shallow incision with converging sides forming angle of ~110°, lateral sections faintly curved; apical setae throughout invaginated section, comprising seven alveoli (with one seta each) on each side; notospiculum weak, slightly divided apically, posterolateral projections of anterior section weak, not prominent; posterior section triangular, sharply pointed, with basolateral points not as sharply developed as in Euglossa moratoi, slightly more rounded; anterior-most section of gonobase projected ventrally, forming angle of ~100° with remainder of ventral edge; gonostylus simple (‘type V’ of Ospina-Torres et al. 2006), lateral lobe pointed and slightly curved downwards; gonostylar setae long throughout; dorsal process of gonocoxa well developed, apical process evenly rounded laterally.

♀: Unknown.

The specific epithet is a patronym honoring Dr. Claus Rasmussen, noted corbiculate bee biologist and systematist, in recognition of his years of kind collegiality.

Specimens of this species have been collected mostly from baits of cineole and vanillin, while a few specimens were collected from skatole.

Euglossa clausi sp. n. is a widespread bee in the Atlantic forest. Males have been collected from the state of Pernambuco in the north, to the northern portion of the state of São Paulo in the south (vide Nemésio 2009: 115 for specific locations where this species has been recorded).

Specimens of this species had been labeled in collections under the nomen nudum “cyanifrons”. It may be that additional material is located in other institutions under this name. In addition, individuals of this species were treated in the literature as Euglossa sapphirina (Tonhasca et al. 2002a, 2002b, 2003; Neves and Viana 2003; Nemésio and Silveira 2006, 2007) or Euglossa crassipunctata (Milet-Pinheiro and Schlindwein 2005; Moura and Schlindwein 2009; Nemésio 2009, 2010b, 2011a, 2011b).

♂, with the following data: “EIA Porto Trombetas, Cipó I, Zona Leste, 12200-36025” and “Oriximiná, PA, Brasil 25/02/2007, R. B. Martines” (UFMG). The type locality is: Porto Trombetas, in the municipality of Oriximiná, state of Pará, northern Brazil.

10 ♂♂, with the following label data: “EIA Porto Trombetas, Monte Branco 2, Zona Leste, 11567-34328” and “Oriximiná, PA, Brasil 11/12/2006, R. B. Martines” (UFMG); “idem, 11575-34366” and “idem” (UFMG); “idem, 11578-34374” and “idem” (UFMG); “idem, Cipó 2, Zona Leste, 11634-34512” (SEMC) and “idem, 13/12/2006” and “idem” (UFMG); “idem, Teófilo 2, Zona Leste, 11545-34254” and “idem, 10/12/2006” (UFMG); “ParNa S. do Divisor, 12512-36708” and “Mâncio Lima, AC, Brasil, 21/11/1996, E. F. Morato” (UFMG); “idem, 12541-36759” and “idem” (UFMG); “14507-42692” and “Santarém, PA, Brasil, 11/12/1978, A. Raw”, (UFMG); “14917-43369” and “Manaus, AM, Brasil, 08/10/1988, E. F. Morato” (UFMG); “Santa Maria, 04°13'S, 55°58'W, 14396-42535” and “Itaituba, PA, Brasil, 18/01/1979, J. M. F. Camargo” (UFMG).

Euglossa moratoi sp. n. can be distinguished most easily from Euglossa crassipunctata, Euglossa sapphirina, and Euglossa clausi due to its small size (ca.20% smaller than the other species), the projecting pronotal dorsolateral angle which is more acute (slightly pointing) at its apex (differing from the rather bluntly rounded and non-projecting angle in all other species in the crassipunctata group) (Fig. 17; cf. figure 2), and the longer posterior mesotibial tuft relative to those in Euglossa crassipunctata, Euglossa sapphirina, and Euglossa clausi (Figs 19, 20); photographs of the holotypes of Euglossa crassipunctata and Euglossa sapphirina are in Nemésio 2009: 87). The paraocular ivory markings in Euglossa moratoi are not as wide below as in the other three species (Fig. 18). Moreover, Euglossa moratoi is the least bluish of all four species in this complex, with bluish coloration only on the clypeus and upper frons, mesoscutum, and S2 (Figs 16–18), although there is some variation whereby the blue is slightly more extensive but still always less so than the other species. Euglossa crassipunctata and Euglossa clausi, on the other hand, have strong bluish hues on the metasoma, particularly the sterna and also on the metatibia in the latter species. Euglossa sapphirina is an entirely bluish-violet bee. The apical setae of S7 of Euglossa moratoi are restricted to the very outer sides of the invaginated section, whereas such setae are distributed throughout the invaginated section in Euglossa clausi, although these sterna are otherwise virtually identical between the two species. The posterolateral projections of the anterior section of S8 in Euglossa moratoi are strongly prominent and angled (Fig. 22), while they are distinctly weaker in Euglossa clausi, as is the development of the basolateral projections of the posterior section. The gonostylus of Euglossa moratoi is comparatively shorter than in Euglossa clausi and slightly upcurved (in Euglossa clausi it is more straight or even slightly downcurved) (Figs 23–25). Euglossa moratoi is among the smallest of all Euglossa. While the holotype is approximately 8.0 mm in length, some specimens barely exceed 7.0 mm.

♂: Body length ca. 8.0 mm; forewing length ca. 6.7 mm; head width 3.7 mm; interorbital distance at level of antennal sockets 2.1 mm; maximum interorbital distance 2.2 mm; labiomaxillary complex in repose reaching tip of body; scape length 0.56 mm; compound eye length 2.4 mm; mesoscutellum width 2.0 mm, length 0.93 mm; abdominal width 3.4 mm.

Coloration and vestiture: Clypeus and upper frons dark blue, remainder of face greenish (Fig. 18); ivory paraocular markings well developed, reaching malar area, not very wide below; anterior surface of antennal scape black; mesoscutum bluish-green, mesoscutellum and metasoma green (Figs 16, 17). Wing membranes lightly infumate. Pubescence very sparse, predominantly fulvous on metasoma and around antennal sockets, black and fulvous setae on mesosoma (compared to predominantly black setae in Euglossa clausi). Protibia and probasitarsus fringed with dense, fulvous setae; velvet area occupying all ventral surface of mesotibia, posterior mesotibial tuft approximately nearly one-third size of anterior tuft, triangular, slightly long and merging with anterior tuft; anterior mesotibial tuft oval, 2.5 times larger than posterior tuft (Figs 19, 20); metatibia oblong-rhomboid, inflated (Fig. 21).

Punctation: Mesoscutum with large circular punctures separated by a puncture width or less except anteromedially separated by a puncture width or greater particularly medially; punctures on mesoscutellum sparser than on disc of mesoscutum, with larger circular punctures separated by a puncture width or greater except along borders punctures separated by less than a puncture width. Punctation on discal base of T1 with large circular punctures of roughly same size more clearly defined medially and separated by less than a puncture width; punctation on T1–T6 dense, comprised of small hexagonal punctures; on T7 sparse relative to preceding terga, with large circular punctures; S2 with very small, widely-separated, semicircular tufts.

Terminalia: Male terminalia as in figures 22–25. S7 largely as in Euglossa clausi, with posterior margin of S7 slightly invaginated mesally, forming a shallow incision with converging sides forming an angle of ~110°, lateral sections slightly curved; apical setae only on outer sides of invaginated section, comprising four alveoli (with one seta each) on each side; notospiculum weak, slightly divided apically, posterolateral projections of anterior section large and pronounced; posterior section triangular, sharply pointed apically, with prominent basolateral points; anteriormost section of gonobase curved ventrally forming an angle of ~100° with remainder of ventral edge; gonostylus simple (‘type V’ of Ospina-Torres et al. 2006), lateral section with lobe pointed and slightly curved upwards (sensu Hinojosa-Díaz 2008); gonostylar setae long throughout; dorsal process of gonocoxa well developed, apical process evenly rounded laterally.

♀: Unknown.

The specific epithet is a patronym honoring Dr. Élder Ferreira Morato, noted entomologist and close colleague of the senior author.

Specimens of this species have been collected mostly at baits of vanillin, although a few specimens were also attracted to cineole, eugenol, and skatole.

Euglossa moratoi seems to be widespread in the Amazon Basin. Males have been collected from the westernmost part of the Brazilian Amazon (Nemésio and Morato 2004, 2006; Storck-Tonon et al. 2009; Oliveira et al. 2010) to the state of Pará in the east, where the holotype and some paratypes were collected. We have not examined the individuals identified as Euglossa crassipunctata in Rasmussen (2009), but it is possible that those also belong to Euglossa moratoi or perhaps yet another undescribed species (this seems the most likely of the two scenarios).

Specimens of this species have been treated as Euglossa crassipunctata in the literature (Nemésio and Morato 2004, 2006; Storck-Tonon et al. 2009; Oliveira et al. 2010).

♂, with the following data: “Euglossina da Hileia Baiana, PN Pau Brasil, 19679-56729” and “Porto Seguro, BA, Brasil, 19/04/2009, A. Nemésio” (UFMG). Details of the type locality are: Parque Nacional do Pau Brasil (16°31'S, 39°17'W; 90 m a.s.l.), in the municipality of Porto Seguro, state of Bahia, northeastern Brazil.

4♂♂, with the following label data: “Euglossina da Hileia Baiana, PN Pau Brasil, 19641-56644” and “Porto Seguro, BA, Brasil, 17/04/2009, A. Nemésio” (UFMG); “idem, 19659-56671” and “idem, 18/04/2009” (UFMG); “idem, 19706-56790” and “idem, 20/04/2009” (UFMG), and “Euglossina da Hileia Baiana, PN Descobrimento, 20601-58992” and “Prado, BA, Brasil, 18/12/2008, A. Nemésio” (SEMC).

Euglossa pepei is the most distinctive of the species of crassipunctata group. The shape and size of the anterior mesotibial tuft and the presence of a minute posterior tuft (Figs 29, 30) is most similar to that observed in Euglossa parvula Dressler. However, both species can be separated by the larger size of the oval anterior tuft and the smaller glandular scar of the metatibia in Euglossa pepei. In regards to the terminalia, S8 in Euglossa pepei is distinctly more slender (cf. figures 33 and 37), and the gonostylus is more pronounced (cf. figures 34–36 versus 38–40). In addition, the bluish coloration is practically restricted to the head and discal base of the mesoscutum, and the sterna are golden green, the latter feature contrasting with other species in the group for which there are at least present some bluish hues.

♂: Body length ca. 9.5 mm; forewing length ca. 7.7 mm; head width 3.7 mm; interorbital distance at level of antennal socket 2.1 mm; maximum interorbital distance 2.6 mm; labiomaxillary complex in repose reaching apex of body; scape length 0.7 mm; compound eye length 2.7 mm; mesoscutellum width 2.3 mm, length 1.1 mm; abdominal width 3.8 mm.

Coloration and vestiture: Clypeus and upper frons dark blue, remainder of head greenish (Fig. 28); ivory paraocular markings well developed, reaching malar area but not particularly wide below; anterior surface of antennal scape black; discal base of mesoscutum blue, remainder of mesoscutum, mesoscutellum, and metasoma green (Figs 26, 27). Wing membranes lightly infumate. Pubescence very sparse, predominantly fulvous setae on metasoma and around antennal sockets, black and fulvous setae on mesosoma, black setae especially prominent on mesoscutum (compared to predominantly fulvous setae in Euglossa parvula). Protibia and probasitarsus fringed with dense, fulvous setae; velvet area occupying all ventral surface of mesotibia, posterior mesotibial tuft very small, less than 1/30 of area of anterior tuft; anterior mesotibial tuft oval, very large, occupying approximately one quarter of velvet area length (Figs 29, 30); metatibia oblong-rhomboid, inflated (Fig. 31).

Punctation: Mesoscutum with circular punctures of two different sizes separated by less than a puncture width, those anterolaterally nearly contiguous; punctures on mesoscutellum more widely spaced than those of mesoscutal disc, with larger circular punctures separated by a puncture width or slightly less in medial third otherwise separated by less than a puncture width. Punctation on discal base of T1 with large circular punctures, punctures weak and separated by less than a puncture width; on distal part of T1 and T2–T6 dense, consisting of minute circular punctures; on T7 dense, with large circular punctures; S2 with very small, almost inconspicuous, widely-separated tufts.

Terminalia: Male terminalia as in figures 32–36. Posterior margin of S7 deeply invaginated mesally, lateral sections almost straight; apical setae only on two apexes of invaginated section; notospiculum weak, slightly divided apically, posterolateral projects distinct (in this regard more similar to Euglossa clausi, Euglossa moratoi, and Euglossa parvula); posterior section triangular, elongate, pointed apically, with basolateral projections not as prominent as in Euglossa clausi and Euglossa moratoi; anteriormost section of gonobase curved ventrally, forming angle of ~110° with remainder of ventral edge; gonostylus simple (‘type V’ of Ospina-Torres et al. 2006), lateral lobe long, pointed and almost straight; gonostylar setae short throughout; dorsal process of gonocoxa well developed, apical process evenly rounded laterally (less regularly rounded in Euglossa parvula).

♀: Unknown.

The specific epithet is a patronym honoring Leandro Mattos Santos, nicknamed “Pepê”, in recognition of his accomplishments in melittology.

All four of the known males were collected at baits of vanillin.

Euglossa pepei is known only from the small type series, all collected at Parque Nacional do Pau Brasil, municipality of Porto Seguro, Bahia, Brazil.