Stilobezzia ( Acanthohelea ) nigerrima Ingram and Macfie, 1931

Stilobezzia ( Acanthohelea) nigerrima Ingram and Macfie, 1931 View in CoL

( Figure 15D View Figure 15 )

Stilobezzia nigerrima Ingram and Macfie, 1931: 196 View in CoL (female; Argentina).

Stilobezzia ( Neostilobezzia) nigerrima: Das Gupta and Wirth, 1968:141 View in CoL (in list); Wirth, 1974: 43 (in catalogue of New World species south of USA).

Stilobezzia ( Acanthohelea) nigerrima: Spinelli and Wirth, 1993: 51 View in CoL (in list; Argentina); Borkent and Wirth, 1997: 233 (in World catalogue); Borkent and Spinelli, 2000:52 (in catalogue of species of southern USA); Cazorla and Spinelli, 2007: 181 (male; Chile); Borkent and Spinelli, 2007: 85 (in Neotropical synopsis); Borkent, 2014: 135 (in online World catalogue).

Diagnosis

The only Patagonian species of Stilobezzia ( Acanthohelea) with the thorax entirely dark brown, legs dark brown except coxae brown, trochanters and base of mid and hind femora slightly paler. Males sternite 9 with rounded, narrow, deep posteromedian excavation. Females anterior margin of sternite 8 convex with a U-shaped posteromedian excavation.

Distribution

Argentina ( Río Negro), Chile (Malleco, Valdivia, Llanquihue, Chiloé) ( Figure 19 View Figure 19 ).

Types

Holotype female, 1 female paratype, Argentina, Prov. Río Negro, Bariloche , 1 December 1926, F. and M. Edwards ( BMNH).

Other specimens examined

Chile, Malleco prov. , Parque Nacional Nahuelbuta, 26 December 1984, J. A. Downes, 2 females, sweep net (JAD 1682/2/7,101) ( CNCI) ; Valdivia prov., Isla Teja , 28 December 1984, J. A. Downes, 1 male, sweep net (JAD 1684/1/2) ( CNCI) ; same data except Osorno around Los Ulmos, 29 December 1984, 1 female (JAD 1687/3/1) ( CNCI) ; Puringe Pobre , 8 January 1985, J. A. Downes, 2 females, sweep net (JAD 1692/1/24,25) ( CNCI) ; Llanquihue prov. , road to Los Ulmos, 29 December 1984, J. A. Downes, 1 female, sweep net (JAD 1685/1/5) ( CNCI) ; Chiloé prov. , Huillinco, 3 January 1985, J. A. Downes, 3 females, 2 males, sweep net (JAD 1690/3/6,8,9,20,21) ( CNCI) ; same data except 4 January 1985, 3 females (JAD 1691/2/45,57,56) ( CNCI) .

Remarks

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