Tabanus trivittatus, Fabricius, 1805
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publication ID |
https://doi.org/ 10.11646/zootaxa.4554.1.2 |
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publication LSID |
lsid:zoobank.org:pub:986112BE-6ABB-47FE-BA8F-CECEF1C21A5D |
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DOI |
https://doi.org/10.5281/zenodo.5944702 |
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persistent identifier |
https://treatment.plazi.org/id/746A87ED-7309-FF91-FF17-D54822C8113B |
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treatment provided by |
Plazi |
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scientific name |
Tabanus trivittatus |
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Key for females of Tabanus trivittatus View in CoL species-group. Adapted from Fairchild (1976)
1 Subcallus largely pruinescent, bare areas reduced to patches above each antennal base, separated by a median pruinescent stripe ( Fig. 10C View FIGURE 10 ). Abdomen acutely pointed. All coxae, fore femur and at least bases of remaining femora black. Antennal style contrastingly black, postpedicel yellow, but slightly longer than style, its dorsal angle rounded. Abdomen pale haired beneath, unbanded, the dorsal mid stripe of a series connected slender triangles, dorsolateral stripes broader. Pacific coast of Panama ( Fig. 33 View FIGURE 33 )...................................................................................... T. enanus View in CoL
- Subcallus extensively bare, without pruinescent mid stripe ( Figs. 1C View FIGURE 1 , 5C View FIGURE 5 , 7C View FIGURE 7 , 9C View FIGURE 9 , 11C View FIGURE 11 ). Abdomen not regularly pointed.... 2
2 Abdomen with conspicuous color contrast, first two or three tergites brownish yellow with yellow hairs, the remainder dark brown with black hairs ( Fig. 3A View FIGURE 3 ). Fore femur brown, mid and hind femora with brownish yellow integument, frequently infuscated at the base, never whole black. Subcallus relatively flattened ( Fig. 3D View FIGURE 3 ). Abdomen unbanded ventrally. Frons clearly divergent. South Panama to Northwestern Colombia ( Fig. 33 View FIGURE 33 )........................................... T. aniptus View in CoL
- Abdomen without contrast, if present, not evident. A different combination of characters............................. 3
3 Frons broad, height four times the basal width ( Fig. 21C View FIGURE 21 ). Scutum with sides, including notopleuron, posterior portion, scutellum and a pair of dorsolateral integumental stripes, pale ( Figure 21A View FIGURE 21 ). Legs yellow except tip of fore tibia. Antenna wholly yellow orange. Abdomen wholly pale-haired beneath, the dorsal mid stripe narrow and continuous, the dorsolateral stripes a series of separate oval patches ( Fig. 21A View FIGURE 21 ). Paraguay, Brazil (Mato Grosso do Sul) ( Fig. 36 View FIGURE 36 )................... T. schadei View in CoL
- Frons narrow at least six times as high as basal width. Scutum uniformly colored, no more than notopleuron and scutellum paler................................................................................................ 4
4 Abdomen black or dark brown with a single prominent continuous pale median stripe from first to sixth tergite ( Fig. 5A View FIGURE 5 and 27A View FIGURE 27 ), very rarely with faint indications of dorsolateral pale stripes on tergite 1 or tergites 1 and 2. Wings distinctly brownish especially along fore border and apex. All coxae and femora mostly black. Abdomen distinctly banded ventrally.......... 5
- Abdomen with evident dorsolateral stripes at least to tergite 3 ( Figs. 7A View FIGURE 7 , 10A View FIGURE 10 , 11A View FIGURE 11 , 12A View FIGURE 12 )............................ 7
5 Smaller species, generally less than 10 mm long. Antenna with style darker, generally black and contrasting, or postpedicel partly or wholly dusky ( Fig. 27D View FIGURE 27 ). Wings less dark. Guatemala to western Colombia, Ecuador and Peru ( Fig. 34 View FIGURE 34 ).................................................................................................... T. unistriatus View in CoL
- Larger species, generally over 10 mm in length. Antenna wholly reddish orange. Wing intensely smoky, cell r1 and r2+3 almost black.......................................................................................... 6
6 All femora black. Brazil (Acre and Amazonas). Eastern Peru and Ecuador ( Fig. 34 View FIGURE 34 ).................... T. argentivittatus
- All femora yellow, at most with the hind femur dusky. Peru (Huánuco) ( Fig. 34 View FIGURE 34 )............. T. argentivittatus huallagensis
7 Notopleuron dark, concolorous with scutum (better visualized with integument moistening or scraping)................. 8
- Notopleuron paler than adjacent scutum (better visualized with integument moistening or scraping)................... 12
8 Postpedicel long, nearly or longer than twice the length of antennal style ( Fig. 25D View FIGURE 25 ). Dorsal tooth close to postpedicel base. 9
- Postpedicel shorter, sometimes nearly as long as wide. Style length obviously longer than half postpedicel length ( Figs. 7D View FIGURE 7 , 14D View FIGURE 14 , 16D View FIGURE 16 ).......................................................................................... 10
9 All coxae and femora black ( Fig. 25C View FIGURE 25 ). Colombia. Venezuela. Guyana. Surinam, French Guiana. Brazil (Amazon region). Peru. Bolivia ( Fig. 34 View FIGURE 34 )......................................................................... T. trivittatus View in CoL
- All coxae, mid and hind femora yellow ( Fig. 12C View FIGURE 12 ). Northern Brazil (Pará, Maranhão) ( Fig. 34 View FIGURE 34 )......... T. mackerrasi sp.n.
10 All coxae and femora black or dark brown. Wings light gray ( Fig. 7B View FIGURE 7 ). Eastern Colombia and Peru. Southern Venezuela. Guyana. Brazil (Amazon basin) ( Fig. 31 View FIGURE 31 ).............................................................. T. callosus View in CoL
- Mid and hind femora brownish yellow or dusky only at the base, never all black. Coxae variable. Wings weakly to strongly infuscated.......................................................................................... 11
11 Femora yellow ( Figure 16B View FIGURE 16 ). Callus black, clearly inflated in lateral view ( Fig. 16D View FIGURE 16 ). Wings strongly infuscated. Eastern Peru, Brazil (Acre) ( Fig. 31 View FIGURE 31 )....................................................................... T. picicallosus
- Fore femur black, mid and hind femora blackish at the base, yellow at apex ( Fig. 14B View FIGURE 14 ). Callus light brown, slightly inflated in lateral view ( Fig. 14D View FIGURE 14 ). Wings only weakly infuscated at radial cells. Eastern Peru and Bolivia, Brazil (Acre) ( Fig. 34 View FIGURE 34 )........................................................................................... T. noncallosus sp.n.
12(7) Postpedicel long and slender ( Fig. 13D View FIGURE 13 ), similar to T. trivittatus View in CoL , nearly or longer than twice the length of the antennal style. Dorsal tooth close to postpedicel base. Northern Brazil (Pará, Maranhão) ( Fig. 36 View FIGURE 36 )................... T. macrocerus sp. n.
- Postpedicel short and stout ( Figs. 9D View FIGURE 9 , 11D View FIGURE 11 and 18D View FIGURE 18 ). Style nearly the same length as postpedicel, sometimes longer. Dorsal tooth dislocated toward middle of postpedicel.............................................................. 13
13 All coxae integument mainly yellow. Fore femur yellow to brownish yellow, remaining femora wholly pale ( Fig. 11B View FIGURE 11 )... 14
- At least fore coxa darker than the remainder. Fore femur brown to black, remaining femora at least blackish at the base or darker than tibiae..................................................................................... 18
14 Fore tibia obscurely bicolored, basal half to 2/3 yellow with pale hairs, remaining1/3 yellow to brownish yellow with black hairs. Fore femur mainly pale haired..................................................................... 15
- Fore tibia clearly bicolored, basal half to 2/3 yellow or white, the remaining 1/3 black and black haired ( Fig. 18B View FIGURE 18 ). Fore femur mainly black haired................................................................................... 16
15 Frons twice as wide at vertex than at the base ( Fig. 11A View FIGURE 11 ). Postpedicel nearly as long as wide ( Fig. 11D View FIGURE 11 ). Dorsolateral stripes even to tergite 3, interrupted from 4 to 6. Peru and Bolivia (East of Andes) ( Fig. 31 View FIGURE 31 )............................. T. isis View in CoL
- Frons less convergent ( Fig. 24A View FIGURE 24 ). Postpedicel longer than wide ( Fig. 24D View FIGURE 24 ). Dorsolateral stripes continuous to tergite 5, sometimes 6. Coast of Suriname, French Guiana and Brazil (Pará) ( Fig. 35 View FIGURE 35 ).................................. T. tristichus View in CoL
16 Integument of scutum red to reddish brown. Fore femur mainly pale haired, black haired only on anterior region. Middorsal stripe a slender series of connected triangles. Dorsolateral a series of disconnected patches from tergite 1-6 ( Fig. 9A View FIGURE 9 ). (Mato Grosso, Rondônia, Mato Grosso do Sul, Tocantins and Federal District) ( Fig. 35 View FIGURE 35 )..................... T. dorsorufus sp.n.
- Integument of scutum darker. Fore femur mainly black haired. Middorsal abdominal stripe broad and more even. Dorsolateral abdominal stripes variable ( Figs. 1A View FIGURE 1 , 18A View FIGURE 18 )................................................................ 17
17 Dorsolateral abdominal stripes a series of disconnected patches. Frons narrower (F.I. 8.4) ( Fig. 1A View FIGURE 1 ). Northwestern Brazil (Acre, Rondônia) ( Fig. 32 View FIGURE 32 ).............................................................. T. albocapillus sp. n.
- All Abdominal stripes even, yellow ( Fig. 18A View FIGURE 18 ). Frons broader (F.I. 6.4). Eastern Colombia, Peru and Bolivia, Brazil and northern Argentina ( Fig. 35 View FIGURE 35 )..................................................................... T. restrepoensis View in CoL
18(13) Postpedicel nearly as long as wide ( Fig. 19D View FIGURE 19 ). Pruinescence at dorsal area of subcallus ( Fig. 19C View FIGURE 19 ) more extensive than other species except, T. enanus View in CoL . Dorsolateral stripes extending into tergite 5 ( Fig. 19A View FIGURE 19 ). Mexico (Nayarit, Jalisco, Morelos) ( Fig. 33 View FIGURE 33 ).......................................................................................... T. rhizonshine View in CoL
- Postpedicel clearly longer than wide ( Figs. 15D View FIGURE 15 , 17D View FIGURE 17 and 22D View FIGURE 22 ). Pruinescence of dorsal area on subcallus not so extensive ( Fig. 15C View FIGURE 15 ). Dorsolateral abdominal stripes variable.............................................................. 19
19 Frons broad (Frontal index less than 6.0), strongly divergent above, more than twice as wide at vertex than at base ( Fig. 15C View FIGURE 15 ). Abdominal stripes even ( Fig. 15A View FIGURE 15 ). Argentina (Salta, Catamarca, Misiones). Brazilian Cerrado (Tocantins, Mato Grosso, Goiás, São Paulo) and Paraguay (Villarica, Cerro Pelado) ( Fig. 32 View FIGURE 32 )...................................... T. palpalis View in CoL
- Frons narrower and less divergent. Middorsal abdominal stripe a series of connected triangles. Dorsolateral disconnected.. 20
20 Dorsolateral stripes reaching tergite 5, sometimes 6 ( Fig. 22A View FIGURE 22 ). Wings always glass clear. Amazon basin ( Fig. 32 View FIGURE 32 ).................................................................................................. T. sextriangulus View in CoL
- Dorsolateral stripes reaching tergite 4 ( Fig. 17A View FIGURE 17 ). Wings glass clear or lightly infuscated. Panama to western Ecuador ( Fig. 33 View FIGURE 33 )........................................................................................... T. platycerus View in CoL
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