Stilobezzia (Acanthohelea) curvistyla Cazorla and Spinelli, 2007

Cazorla, Carla G. & Spinelli, Gustavo R., 2014, A revision of the Patagonian predaceous midges of the subgenus Acanthohelea of Stilobezzia excluding the S. (A.) edwardsi group (Diptera: Ceratopogonidae), Journal of Natural History 49 (3), pp. 155-209 : 163-164

Stilobezzia (Acanthohelea) curvistyla Cazorla and Spinelli, 2007

( Figure 15A, B )

Stilobezzia (Acanthohelea) curvistyla Cazorla and Spinelli, 2007: 182 (male, female, Argentina); Borkent, 2014: 134 (in online World catalogue).

Diagnosis

The only Patagonian species of Stilobezzia (Acanthohelea) in which the gonostylus is abruptly curved. Females scutellum with 6 large and 5 thinner setae, sternite 8 with lateral margins rounded and U-shaped posteromedian excavation.

Distribution

Argentina (Neuquen, Río Negro, Chubut), Chile (Valdivia, Llanquihue, Osorno) ( Figure 16 ) .

Types

Holotype male, Argentina, Chubut prov., Parque Nacional Los Alerces, margen E lago Futalaufquen, 20 January 1998, G. Spinelli; allotype female, Argentina, Neuquen prov., arroyo Quechuquina , 16 December 1994, G. Spinelli, sweep net ( MLPA). Other paratypes: 11 males, 1 female, as follows: same data as holotype, 1 male; same data as allotype, 2 males; Neuquen prov., San Martín de los Andes, 23 April 1982, M. Gentili, 1 female, light trap; Río Negro prov., lago Gutiérrez, January 2003, J. Liotta, 1 male, light trap.

Chile: Llanquihue prov. , Las Cascadas, 13 km N Ensenada, Valdivian rain forest, 1–2 December 1994, L. Quate, Malaise trap, 6 males (one in CNCI, one in BMNH) ; same data except Yerbas Buenas , 1–6 June 1994, 150 m, 1 male, light trap .

Other specimens examined

Argentina: Neuquen prov., Parque Nacional Nahuel Huapi, mallin La Heladera, 41° 00 ′ 6.4 ″ S, 71°49 ′ 40.3 ″ W, 878 m, 7 January to 4 February 2007, A. Garré – F. Montes de Oca , 4 males, Malaise trap; same data except 41°00 ′ 56 ″ S, 71°49 ′ 45.4 ″ W, 15 December 2006 to 7 January 2007, A. Garré, F. Montes de Oca – J. Massaferro, 1 male; laguna Mercedes, 40°52 ′ 43.4 ″ S, 71°34 ′ 41 ″ W, 899 m, 3–21 January 2008, A. Garré – F. Montes de Oca , 1 female, Malaise trap; Parque Nacional Nahuel Huapi, arroyo Blanco, 40°39 ′ 3.4 ″ S, 71°24 ′ 45.8 ″ W, 822 m, 12 December 2007 to 3 January 2008, A. Garré – F. Montes de Oca , 2 females, 1 male, Malaise trap ; Río Negro prov., Parque Nacional Nahuel Huapi, Estación Biológica, 41°01 ′ 34.4 ″ S, 71°48 ′ 55.7 ″ W, 764 m, 15 January to 7 February 2007, A. Garré – F. Montes de Oca , 1 male, Malaise trap ; Río Negro prov., Parque Nacional Nahuel Huapi, río Manso superior, 41°14 ′ 28.4 ″ S, 71°44 ′ 12.6 ″ W, 837 m, 7 February to 2 March 2007, A. Garré – F. Montes de Oca , 1 male, Malaise trap .

Chile: Valdivia prov. , Fundo San Martín, 15 November 1984, J. A. Downes, 1 male, sweep net (JAD 1669/2/2; 1670/2/4) ( CNCI) ; Osorno prov. , Petrohue, 10 December 1984, J. A. Downes, 1 male, sweep net (JAD 1694/3/1) ( CNCI) ; Ensenada , 11 December 1984, J. A. Downes, 2 males, sweep net (JAD1695/5/3,5) ( CNCI) ; Parque Nacional Puyehue , 6/ 8 December 1994, L. Quate, 2 males, Malaise trap .

Remarks

This species was described and illustrated in detail by Cazorla and Spinelli (2007).

Figures

Figure 15. Male genitalia: (A) Stilobezzia (A.) curvistyla Cazorla and Spinelli (ventral view); (B) Stilobezzia (A.) curvistyla (dorsal view); (C) Stilobezzia (A.) longisternalis Cazorla and Spinelli (ventral view); (D) Stilobezzia (A.) nigerrima Ingram and Macfie (ventral view).

Figure 16. Distribution of Stilobezzia (A.) bicinctipes and Stilobezzia (A.) curvistyla.