Tabanus Linnaeus 1758
Creators: name: Dutra, Maria Carolina Pimenta
name: Amorim, Dalton De Souza
name: Carmo, Daniel Dias Dornelas Do
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Tabanidae
Tabanus

description: Pictorial key for females of the species group related to T. nebulosus
1. Abdominal integument light yellow to pale greenish (Fig. 2A); wing hyaline or slightly brown infuscated (Fig. 2B); integument of femur and tibia light brown with pale setulae (Fig. 2C)................................ T. olivaceiventris Macquart
- Abdominal integument brownish (Figs. 3A, 3B, 3C); wing, femur, and tibia variable................................ 2
2. Palpus short and inflated, smaller than half the length of the stylets (Fig. 4A); postpedicel of the antenna long and narrow, never as high as long (Fig. 4D); wing brown tinged at the end of the cells br and bm and below the pterostigma (Fig. 4C); Abdomen usually with a black dorsomedial integumental and setulose stripe or a row of spots, and a row of orange dorsolateral spots when well-preserved (tergite 1 to 5 or 6) (Fig. 4B)....................................... T. importunus Wiedemann
- Palpus rarely short and inflated, equal to or longer than half the length of the stylets (Figs. 5A, 5C); if the palpus is short and inflated, the postpedicel of the antenna is short and wide, as high as long (see T. pseudonebulosus, dichotomy 5); wing variable, rarely tinged below the pterostigma (Figs. 5B, 5D); abdomen variable........................................... 3
3. Abdomen does not have any pale dorsal spot, stripe or triangle whether integumental or setulose (Figs. 6A, 6B).......... 4
- Abdomen, when preserved, has at least some pale dorsal spot, stripe or triangle whether integumental or setulose (Figs. 7A, 7B, 7C)................................................................................................ 5
4. Postpedicel with a long dorsal spine, longer than one-third of the postpedicel’s size (Fig. 8A); pleuron with an evident tuft of dark setulae below the wing base (Fig. 8B).................................................. T. punctipleura Hine
- Postpedicel at most with a small dorsal spine, smaller than one-third of the postpedicel’s size (Fig. 9A); pleuron with a slightly evident tuft of dark setulae below the wing base (Fig. 9B)........................................... T. lutzi Kröber
5. Postpedicel short and wide, as high as long (Fig. 10A); palpus can be smaller or longer than half the length of the stylets (Fig. 10B); wing hyaline or weak brownish tinged at the wing base and/or at the crossveins (Fig. 10C); abdomen usually with a black dorsomedial integumental stripe (tergite 2 to 7) (Fig. 7A)........................ T. pseudonebulosus Gorayeb & Barros
- Postpedicel longer than high (Fig. 11A, 11B); palpus never short, always equal to or larger than half the length of the stylets (Fig. 11C, 11D, 11E); wing variable; abdomen variable....................................................... 6 6. Wing hyaline (Fig. 12A, 12B)........................................................................... 7 - Wing not hyaline, uniformly infuscated, or tinged at the cells br and bm or crossveins (Fig. 13A, 13B).................. 8
7. Narrower frons, frontal index greater than 4 (Fig. 14A); palpus with predominantly white setulae (Fig. 5A, 14A); abdomen with dorsomedial white setulose triangles (tergite 2 to 4), wider than in T. vestigium sp. n (Fig. 14B); gray pruinosity on the scutum (Fig. 14C).............................................................................. T. comosus Stone
- Wider frons, frontal index less than 4 (Fig. 15A); palpus with predominantly dark setulae (Fig. 15A); abdomen with dorsomedial light yellow setulose triangles (tergite 1 to 6), narrower than in T. comosus (Fig. 15B); brown pruinosity on the scutum (Fig. 15C)................................................................................ T. vestigium sp. nov.
8. Abdomen with a dorsomedial stripe of connected white setulose enlongated triangles, without dorsolateral pale spots or triangles (Fig.16)................................................ T. rondoniensis Henriques, Krolow, Zamarchi & Camargo - Abdomen with a series of unconnected median pale triangles, may have a dorsolateral spots or triangles (Fig. 17A, 17B, 17C)................................................................................................... 9
9. Scutum with a pair of conspicuous dorsolateral dark stripes (Fig. 18A); abdomen without a black dorsomedial integumental stripe, with an evident dorsomedial (tergite 1 or 2 to 4) pale equilateral triangles and a dorsolateral light spots of pale setulae (tergite 2 to 6) (Fig. 18B); wing brownish tinged at the cells br and bm and calypter, costal cell orange (Fig. 18C)........................................................................................... T. guyanensis Macquart
- Scutum without a pair of conspicuous dark dorsolateral stripes (Fig. 19A, 19B); abdomen may have a black dorsomedial integumental stripe, with dorsomedial and dorsolateral triangles of pale setulae, but generally smaller and less evident than in T. guyanensis (Fig. 19C); wing variable................................................................... 10
10. Wing brown infuscated, orange costal cell, never with a brownish cloud in the fork of vein R 4+5 (Fig. 20C); frons parallel or divergent at base, divergence index (DI) less than 1.1 (Fig. 20A); scutum and scutellum integument black with grayish pruinosity; (Fig. 20B)................................................................. T. glaucus Wiedemann
- Wing with brown clouds on the crossveins, sometimes hyaline, slightly tinged costal cell, nearly always with a brownish cloud in the fork of vein R 4+5 (Fig 22C, 23C); frons convergent at base, divergence index greater than 1.1 (Fig. 21A, 21B); scutum and scutellum integument reddish-brown, usually with brownish pruinosity (Fig. 19A, 19B)............................ 11
11. Wing with weak brown clouds at the crossveins or uniformly infuscated, usually with weak cloud at the fork of vein R 4+5 (Fig. 22C); abdomen with dorsolateral spots of light-yellow setulae, larger than on T. ornativentris (Fig. 22A); hind tibia with a golden dorsal comb of setae (Fig. 22B).................................................... T. nebulosus De Geer
- Wing with strong dark clouds at the crossveins and in the fork of vein R 4+5 (Fig. 23C); abdomen with dorsolateral spots of light-yellow setulae, smaller than on T. nebulosus (Fig. 23A); hind tibia with a black dorsal comb of setae (Fig. 23B)........................................................................................... T. ornativentris (Kröber)
description: Published as part of Dutra, Maria Carolina Pimenta, Amorim, Dalton De Souza & Carmo, Daniel Dias Dornelas Do, 2025, Taxonomic revision of the Tabanus nebulosus species group (Diptera: Tabanidae), pp. 1-48 in Zootaxa 5588 (1) on pages 3-11, DOI: 10.11646/zootaxa.5588.1.1, http://zenodo.org/record/14895899