Orthocladius vaillanti Langton & Cranston, 1991

Orthocladius vaillanti Langton & Cranston, 1991

Orthocladius Pe 1 Langton, 1984: 157 (Langton & Cranston 1991)

Orthocladius Pe 13 Langton, 1991: 184 (Caldwell 1998)

DESCRIPTION. See Langton & Cranston (1991, Fig. 5). Adult male and larva described in Caldwell (1998). Very similar to O. frigidus, but points on tergites much more extensive. Thoracic horn as in O. frigidus (Caldwell, 1998) but weak and easily broken off. Pedes spurii B well developed. T II­VI nearly completely covered with points extending beyond the antero­lateral adhesion marks, T VII similarly armed but with smaller points. On T II posterior points are larger than very weak median ones. Pedes spurii A on S IV­VI. Three lateral setae on segments II­VII, five on segment VIII. Anal lobes with a strong fringe of lateral setae. Anal macrosetae 200 m long, anal lobes 345­425 m long and 415­500 m wide.

MATERIAL EXAMINED: ITALY: LOMBARDIA: Brembo river, Bonate sotto, 13/4/ /2001, 1 Pex; S.G.Bianco 1/2000, 1 Pex; Lambro river, 21/3/1996, 1 Pex. EMILIA ROMAGNA: Taro river, Bedonia Compiano, 24/4/2001, 1 Pex; Borgo Val di Taro, 2/5/ 2000, 1 Pex; Bidente stream, 27/3/1979, 1 Pex; Savio stream, Bagni di Romagna, 12/2/ 1992, 1 Pex. MARCHE: Aso stream, 17/4/1980, 1 Pex.