Oxytrigona Cockerell, 1917
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publication ID |
https://doi.org/ 10.11646/zootaxa.5506.3.4 |
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publication LSID |
lsid:zoobank.org:pub:0B48C57C-402F-4231-9B8D-55C5F85FB0B0 |
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DOI |
https://doi.org/10.5281/zenodo.13759746 |
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persistent identifier |
https://treatment.plazi.org/id/03B57538-577D-FFFA-CBE4-FF66C381CCDE |
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treatment provided by |
Plazi |
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scientific name |
Oxytrigona Cockerell |
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Key to the species of Oxytrigona Cockerell View in CoL , based on workers
1. Forewing with distal portion of radial cell and entire marginal cell distinctly darkened; veins and pterostigma dark brown ( Figure 8A View FIGURE 8 )......................................................................................... 2
- Forewing with membrane completely or mostly hyaline, distal portion of radial and marginal cells not strongly darkened, sometimes yellowish or brownish infumate (as in Figures 3E, F View FIGURE 3 ); veins and pterostigma yellow to brown............... 3
2. Body predominantly yellow to orange; pubescence of head and mesosoma ferruginous; antennal scape with erect black setae (between 0.5 and 0.8 MOD in length) restricted to its distal portion ( Figure 8B View FIGURE 8 ).... Oxytrigona mulfordi ( Schwarz, 1948) View in CoL
- Body predominantly dark brown to black, only lower half of head pale; pubescence of head and mesosoma black; antennal scape usually with erect black setae (between 0.8 and 1.5 MOD in length) scattered throughout............................................................................................... Oxytrigona obscura (Friese, 1900) View in CoL
3. Head mostly dark brown to black, often becoming lighter ventral to antennal socket level; mesoscutum entirely black; scutellum dark brown to black; pubescence mostly black.............................................................. 4
- Head mostly orange or yellow, at most with dark spot near ocelli; mesoscutum usually yellowish to brown, at least medially and on surface adjacent to tegula (except for O. cagafogo , in which it sometimes is entirely black, but the head is orange); scutellum yellow to brown; color of pubescence variable ............................................................. 7
4. Mesoscutum with long erect setae becoming virtually absent posterior to mid-level of tegula; scutellum with erect setae becoming distinctly shorter or absent on anterior half; scape mostly without erect black setae, only with very short erect setae near distal end; distal angle of dorsal margin of hind basitarsus sharply angled ( Figure 6D View FIGURE 6 ); distal corner of dorsal margin of hind tibia with dense tuft of densely branched brown setae ( Figure 6D View FIGURE 6 ).................. Oxytrigona sauronica sp. nov.
- Mesoscutum with long erect setae evenly distributed throughout sclerite; scutellum with erect setae evenly long, distributed throughout sclerite; scape with black erect setae with at least 0.5 MOD in length, often restricted to distal end; distal portion of dorsal margin of hind basitarsus widely angled or rounded; distal corner of dorsal margin of hind tibia with relatively sparse black setae with few apical ramifications.................................................................. 5
5. Hind basitarsus conspicuously narrower proximally, distal corner of dorsal margin rounded (as in Figure 8C View FIGURE 8 ); smaller size, head width below 2.3 mm; scape with erect black setae (0.5–1.2 × F2 width) scattered throughout (as in Figure 8E View FIGURE 8 ); pubescence on posterior surface of T3–T5 relatively sparse; short setae on posterior margin of T3 and T4 scarce, shorter than 0.2 MOD; F2 with distinctly long setae (longer than 0.7 F2 width, these setae can be absent in some specimens); surface between mid and lateral ocelli with short branched setae.................................................................... 6
- Hind basitarsus almost as wide proximally as on its distal portion, distal corner of dorsal margin widely angled ( Figure 8D View FIGURE 8 ); larger size, head as wide as 2.5 mm or more; scape with erect black setae (0.5–1.2 × F2 width) restricted to its distal end ( Figure 8F View FIGURE 8 ); T3–T5 with dense pubescence on posterior surface; short setae on posterior margin of T3 and T4 relatively abundant, longer than 0.2 MOD; F2 never with distinctly long setae; surface between mid and lateral ocelli with simple setae................................................................................ Oxytrigona ignis Camargo, 1984 View in CoL
6. Metasomal terga yellow to light ferruginous; scape light to dark brown; ventral half of face with orange hue................................................................................ Oxytrigona daemoniaca Camargo, 1984 View in CoL
- Metasomal terga dark brown; scape usually dark brown to black; ventral half of face with yellowish to light brown hue............................................................... Oxytrigona chocoana Gonzalez and Roubik, 2008 View in CoL
7. Surface between ocellar triangle and antennal sockets with dense coverage of short setae, punctation relatively dense, especially near ocellar triangle level (as in Figures 4B View FIGURE 4 , 5B View FIGURE 5 )............................................................ 8
- Surface between ocellar triangle and antennal sockets glabrous or with scattered tiny setae, punctation sparse (as in Figure 3B View FIGURE 3 )............................................................................................... 11
8. Frons with evenly dense punctation between compound eye and frontal line, interspaces about as long as puncture diameter; long setae on frons absent ventrad ocellar triangle level; antennal sockets separated by nearly one socket diameter ( Figure 4B View FIGURE 4 ); postero-dorsal surface of propodeum striate; ventral margin of fore femur carinate; mid basitarsus relatively short, as long as 2 × its maximum width.................................................. Oxytrigona mellicolor ( Packard, 1869) View in CoL
- Frons with denser punctation near ocellar triangle level, becoming sparser near antennal sockets, interspaces far longer than puncture diameter; long setae usually present ventrad ocellar triangle level; antennal sockets separated by 0.8 × socket diameter or less; postero-dorsal surface of propodeum smooth; ventral margin of fore femur not carinate, rounded; mid basitarsus relatively long, longer than 2.3 × its maximum width........................................................ 9
9. Fore femur less than 3.7 times longer than its maximum width; smaller size, head width equal 2.4 mm or less; short setae on posterior margin of T3 relatively longer (0.5 × MOD) and densely branched................................................................................................... Oxytrigona isthmina Gonzalez & Roubik, 2008 View in CoL
- Fore femur longer than 4 × its maximum width; larger size, head width over 2.5 mm; short setae on posterior margin of T3 shorter than 0.4 × MOD and mostly simple............................................................... 10
10. Longest setae on vertex about 1.7 × MOD; mesoscutum yellow to orange between notauli and dark brown to black laterad; legs brown; posterior margin of S6 widely rounded (see fig. 9 in Gonzalez & Roubik 2008); setae on distal end of scape longer than 0.7 × MOD......................................................... Oxytrigona mediorufa (Cockerell, 1913) View in CoL
- Longest setae on vertex about 1.3 × MOD or shorter; mesoscutum entirely light brown or caramel yellow; legs yellow; posterior margin of S6 truncate (see fig. 21 in Gonzalez & Roubik 2008); setae on distal end of scape shorter than 0.5 × MOD.................................................................................... Oxytrigona pallida sp. nov.
11. Erect setae on vertex yellowish; hind basitarsus relatively slender, with a slightly curved dorsal margin, with the posterior distal corner somewhat angled towards a straight distal margin ( Figure 3D View FIGURE 3 ); distal half of wing membrane hyaline, at most slightly yellowish dorsally ( Figure 3F View FIGURE 3 ); posterior margin of S6 somewhat pointed (see figure 65 of Gonzalez & Roubik 2008); S4–S6 with relatively denser coverage of setae, which are mostly yellowish; posterior margin of T4 mostly with sparse simple setae....................................................................... Oxytrigona flaveola (Friese, 1900) View in CoL
- Erect setae on vertex light brown to black; hind basitarsus relatively broad, with a strongly curved dorsal margin, with the posterior distal corner somewhat rounded towards a curved distal margin (as in Figures 1D View FIGURE 1 , 3C View FIGURE 3 ); color of wing membrane variable, often with light or dark brown spots (as in Figures 1A View FIGURE 1 , 3E View FIGURE 3 ); posterior margin of S6 widely rounded (see figure 62 of Gonzalez & Roubik 2008); S4–S6 with sparser coverage of setae, which are entirely or mostly dark; posterior margin of T4 with relatively denser coverage of branched setae.......................................................... 12
12. Mesoscutum entirely black, sometimes with a lighter stripe adjacent to tegula ( Figure 3A View FIGURE 3 ); forewing with distal portion of radial cell and entire marginal cell brownish infumate ( Figure 3E View FIGURE 3 ); labrum and mandible mostly dark brown to black.................................................................................. Oxytrigona cagafogo ( Müller, 1874)
- Mesoscutum usually yellow to light brown between notauli and darker laterad, sometimes entirely light brown (as in Figures 1B View FIGURE 1 , 7A View FIGURE 7 ); forewing with distal portion of radial cell and entire marginal cell hyaline or yellowish (as in Figure 3F View FIGURE 3 ); labrum yellowish to light brown; medial third of mandible usually yellowish to light brown (as in Figure 1C View FIGURE 1 )................. 13
13. Mesoscutum with short branched setae reaching posterior level of tegula, coverage of branched setae relatively denser ( Figure 7B View FIGURE 7 ); mesepisternum with dense coverage of branched setae ( Figures 7C, D View FIGURE 7 )........... Oxytrigona tataira (Smith, 1863) View in CoL
- Mesoscutum with short branched setae restricted to anterior portion of sclerite, not reaching posterior level of tegula, coverage of branched setae sparse ( Figure 1B View FIGURE 1 ); branched setae on mesepisternum relatively sparse...... Oxytrigona banana sp. nov.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.