Orthocladius wetterensis Brundin, 1956

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 wetterensis Brundin, 1956

O. wetterensis Brundin, 1956

Orthocladius Pe 8, Langton, 1984: 156, Langton 1991: 190 ( Langton & Cranston 1991)

O. rachelae Rossaro & Prato, 1991 ( Rossaro 1991)

DESCRIPTION. Langton & Cranston (1991, Fig. 1 d; Fig. 3b) and Rossaro & Prato (1991, Fig. 9, 10, 11, 12; sub rachelae ) gave descriptions of the species. Thoracic horn 216­310 m long, 43 m wide, dark, with two enlargements in its median and basal part, narrowed in its apical part. Points of posterior band of TIII obviously smaller than those of anterior, median and apical bands. Points not extended on tergites, only an expanded area of very small points in antero­lateral corners is present. Points very reduced on SII­IV. Pedes spurii A present on S IV­VI, reduced on S VII. Anal lobes without taeniate extensions, but a lateral fringe of small extensions may be present. Anal macrosetae 180­215 m long, anal lobes 390­440 m long, 375­390 m wide.

MATERIAL EXAMINED: ITALY: PIEMONTE: Elvo stream, Sordevolo, ( BI), 21/4/ 2001, 3 Pex. LOMBARDIA: Lambro river, Asso, 21/3/1996, 1 Pex; S.Calocero, 21/3/ 1996, 1 Pex. EMILIA ROMAGNA: tributary of Taro river, Bedonia, 15/5/2001, 10 Pex; Case Nicola, 24/4/2001, 1 Pex; Taro river, Compiano, 24/4/2001, 1 Pex; Passo dell'Abetone, 2/3/1981, 1 Pex; 1 male pupa. ABRUZZO: Sangro river, P.N. Abruzzo, st.4 (SS 84, Km 41), 20/5/1978, 1 Pex.

Figures

FIGURE 1. Ventral view (sternite) on the left, dorsal view (tergite) on the right. 1.1: O. marchettii: tergite III with anterior, median, posterior and apical point fields; 1.2: O. pedestris: tergite III with anterior, median, posterior and apical point fields