Oecetis scirpicula Neboiss, 1977

Wells, Alice, 2004, The long-horned caddisfly genus Oecetis (Trichoptera: Leptoceridae) in Australia: two new species groups and 17 new species, Memoirs of Museum Victoria 61 (1), pp. 85-110 : 91

Oecetis scirpicula Neboiss

Figures 10, 11, 104

Oecetis scirpicula Neboiss, 1977: 149 , figs 804–807.

Material examined. Tas. : 2 males, Canal at Interlaken, 42°8.8'S 147°10.5'E, 2 Feb 1966, G.E. Edmunds ( ANIC) ; males, females, Navarre River , 42°9.5'S 146°8.6'E, 12 Feb 1967, E.F. Riek ( ANIC) ; 1 male, Olga-Hardwood River , Saddle buttongrass plain, 42°57.8'S 145°55.3'E, 4 Apr 1977, Allbrook, Richardson, Swain ( NMV) ; 2 males, 12 km NNE Bronte Park , 42°02'S 146°33'E, 2 Feb 1983, J.C. Cardale ( ANIC) ; male, 2 females, Pelion Hut , 3 km S Mt Oakleigh, 41°50'S 146°03'E, Feb.1990, E.S. Nielsen, lt trap ( ANIC) .

Diagnosis. Forewing (Fig. 10) length about 4 times maximum width, veins of the posterior anastomosis contiguous; in male genitalia ( Fig. 11 ), abdominal segment IX produced posteriorly to form a triangular process ventral to preanal appendages and inferior appendages with distal slender distal portion twice length of basal portion.

Distribution. Tas. (Fig. 104).

Remarks. Although males of this species closely resemble those of O. atarpa , as noted above, the name scirpicula is retained here for these Tasmanian specimens. The two species have only slight difference in forewing venation and in the genitalia— proportions of the inferior appendages, differences that are well within the range of variability accepted for other species. Size differences, however, are considerable, the anterior wing length of around 9 mm for O. scirpicula being several millimetres longer than in O. atarpa . In addition, females of O. scirpicula lack the broadly rounded dorsal lobes seen in O. atarpa ( Mosely and Kimmins, 1953: fig. 203c), having in their place a pair of almond-shaped lobes.

Figures

Figure 11, Oecetis scirpicula Neboiss, male genitalia, lateral view [from Neboiss, 1977]. Figures 12–14, O. inscripta Kimmins: 12, forewing; 13, 14, male inferior appendages in ventral view, genitalia in lateral view [from Mosely and Kimmins, 1953]. Figures 15–18, O. brevidentata sp. nov.: 15, forewing; 16–18, male genitalia, ventral, dorsal and lateral views. Figure 19, 20, O. asmanista Mosely, male genitalia, ventral and lateral views [from Mosely and Kimmins, 1953].