Stilobezzia Kieffer.
Creators: name: Huerta, Herón
name: Grogan, William L.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Ceratopogonidae
Stilobezzia

description: Key to Adult Stilobezzia of Mexico
1 Females .............................................................................................2
- Males..............................................................................................14
2 Wing with 1 radial cell; fore femur with 2–4 stout black ventral spines........... S. (Eukraiohelea) elegantula (Johannsen)
- Wing with 2 radial cells; fore femur without ventral spines.....................................................3
3 Wing membrane with numerous macrotrichia primarily in cells r3 and m1 (Fig.17) … S. (Acanthohelea).................4
- Wing membrane bare or with a few macrotrichia only on anterior margin in cell r3 S. (Stilobezzia)......................5
4 Scutellum yellow on mid portion; wing hyaline.............................................. S. (A.) fuscula Wirth
- Scutellum dark brown; wing infuscated (Fig. 17)............................................ S. (A.) spinellii, n. sp.
5 Wing with 2 or 3 dark spots on anterior margin.............................................................. 6
- Wing hyaline or infuscated, without dark spots on anterior margin..............................................10
6 Fore tibia with numerous small dark spots; scutum with short anterior tubercle..................................... 7
- Fore tibia without numerous small dark spots; scutum with or without anterior tubercle........................... … 8
7 Wing with 2 dark spots, on r-m crossvein and very small one at base of 2nd radial cell................. S. (S.) kiefferi Lane
- Wing with 3 dark spots, on r-m crossvein, and 2 others at base and apex of 2nd radial cell........... S. (S.) punctulata Lane
8 Mesonotum yellow, without anterior tubercle; wing hyaline, with distinct brown spots on r-m crossvein and at level of 2nd radial cell; legs yellow, narrow apices of hind femur and tibia brown.......................... S. (S.) coquilletti Kieffer
- Mesonotum brown, with anterior tubercle; wing brownish, anterior margin with 2 or 3 dark spots; legs with extensive brown bands............................................................................................... 9
9 Fifth tarsomeres with ventral batonnets; wing with 3 dark spots, including 1 on apex of 2nd radial cell.... S. (S.) rabelloi Lane
- Fifth tarsomeres without ventral batonnets; wing with 2 dark wing spots, none on apex of 2nd radial cell.. S. (S.) beckae Wirth
10 Fifth tarsomeres with ventral batonnets................................................................... 11
- Fifth tarsomeres without ventral batonnets.................................................................13
11 Mid femur blackish on proximal 2/3; abdomen shining black......................... S. (S.) femoralis Lane & Forattini
- Mid femur pale; abdomen pale green or yellowish...........................................................12
12 Femora, tibiae whitish, hind femur with faint dark apical band.................................. S. (S.) glauca Macfie
- Femora, tibiae yellowish, hind femur with solid dark apical band............................... S. (S.) maculata Lane
13 Mesonotum dark brown, with large pruinose gray spots; tibiae with sub-basal pale bands.............. S. (S.) hirta Borkent
- Mesonotum uniform light grayish brown without spots; tibiae without bands............... S. (S.) pallidiventris (Malloch)
14 Wing with 1 radial cell; fifth tarsomeres with ventral batonnets; fore femur with 3–4 ventral spines.......................................................................................... S. (Eukraiohelea) elegantula (Johannsen)
- Wing with 2 radial cells; fifth tarsomeres with or without ventral batonnets; fore femur without ventral spines...........15
15 Wing with 2 or 3 dark spots on anterior margin............................................................. 16
- Wing without dark spots...............................................................................20
16 Fore tibia with numerous small dark spots; scutum with short anterior tubercle.................................... 17
- Fore tibia without numerous dark spots; scutum with or without anterior tubercle..................................18
17 Aedeagus with an oblique pair of doubly sinuate sclerites with sickle-shaped apices; parameres with slender tapered apices that are abruptly bent ventrocephalad.......................................................... S. (S.) kiefferi Lane
- Aedeagus with a pair of dark brown lateral sclerites with pointed tips; parameres separate with 2 elongate sclerites with sharply pointed apices that are posteriorly directed................................................ S. (S.) punctulata Lane
18 Hind tibia with stout, black setae on dorsal surface; parameres with a pair of basolateral L-shaped sclerites..................................................................................................... S. (S.) rabelloi Lane
- Hind tibia without stout, black setae on dorsal surface; parameres without a pair of basolateral L-shaped sclerites........19
19 Legs yellow, narrow apices of hind femur and tibia brown; aedeagal sclerites with rounded apices... S. (S.) coquilletti Kieffer
- Legs dark brown, hind femur with narrow subapical lighter band; aedeagal sclerites with slender apices that are recurved 120̊, tips pointed.......................................................................... S. (S.) beckae Wirth
20 Wing membrane with numerous macrotrichia primarily in cells r3 and m1 (Fig. 16) S. (Acanthohelea)..................21
- Wing membrane bare or with a few macrotrichia on only anterior margin of cell r3… S. (Stilobezzia)....................22
21 Gonocoxite with an elongate black spine on mesal margin; parameres with apices gradually narrowed to fine apical filaments that are recurved...................................................................... S. (A.) fuscula Wirth
- Gonocoxite without an elongate black spine on mesal margin; parameres with distal portions broad, straight, apicolateral mar- gins spoon-like (Figs. 21, 23)........................................................... S. (A.) spinellii, n. sp.
22 Abdomen with distinctive dark stripes on tergites 4–5 or single dark band on 5.................................... 23
- Abdomen without distinctive dark markings on tergites.......................................................24
23 Aedeagus with an oblique pair of long, straight, slender, sclerotized bars.......................... S. (S.) glauca Macfie
- Aedeagus with oblique pair of sclerotized bars, apices gradually narrowed to a fine apical filament..... S. (S.) maculata Lane
24 Abdomen shining black; hind femur black........................................ S. (S.) femoralis Lane & Forattini
- Abdomen yellow or pale; hind femur yellow or pale brown...................................................25
25 Gonostylus tapering distally to slender pointed tip.................................... S. (S.) pallidiventris (Malloch)
- Gonostylus not tapered, with broad rounded apex............................................. S. (S.) hirta Borkent
description: Published as part of Huerta, Herón & Grogan, William L., 2017, New species and new records of predaceous midges in the genera, Schizonyxhelea Clastrier and Stilobezzia Kieffer from Mexico (Diptera: Ceratopogonidae), pp. 401-418 in Zootaxa 4294 (4) on pages 407-408, DOI: 10.11646/zootaxa.4294.4.1, http://zenodo.org/record/832774