Orthocladius vaillanti Langton & Cranston, 1991

Bruno Rossaro & Carlotta Casalegno, 2001, Description of the pupal exuviae of some species belonging to Orthocladius s. str. van der Wulp, 1874 (Diptera: Chironomidae: Orthocladiinae), with a new key to species of West Palaearctic region, Zootaxa 7, pp. 1-20 : 16

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.