Oecetis crena, Wells, 2004

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 : 98

Oecetis crena sp. nov.

Figures 50–52, 117

Material examined. Holotype, male, Vic., Gibbo River at Exhibition Creek junction, 20 km N Benambra, 16 Jan 1982, A. Wells ( NMV T-18512).

Paratypes, Vic.: 1 male, 5 females, Mitta Mitta river , 8 km NE of Benambra, 5 Feb 1974, A. Neboiss ( NMV) ; 1 male, Wellington River , 23 km NNE of Licola on Tamboritha Road, 21 Feb 1978, NMV Survey Department ( NMV) ; 1 male, Yarra River, East Warburton , ii.1980, I Campbell ( NMV) ; 1 male, 2 females, Nongungarra and Crooked River junction, 4 Feb 1981, J. Blyth ( NMV) ; male, Cobungra River, at Anglers Rest , 15 January 1982, A. Wells ( NMV) .

Other material. Vic.: male, 4 females, Porepunkah River , 26 Jan 1960, A. Neboiss ( NMV) .

Diagnosis. Male genitalia inferior appendages clasper-shaped, with a median expansion on the inner margin and fringes of short setae dorso-basally; in the forewing a footstalk on fork 1, and t2 more distal than t1 and t3.

Description. Spurs 1, 2, 2. Forewing length 7.1–8.1mm. Wings with long downy setae along veins; forewing fork 1 about twice length of footstalk, anterior anastomosis with t1 and t2 almost level, more distal than t3. Male genitalia, Figs 50–52. Segment IX short, a triangular projection midlaterally on apical margin, preanal appendages small, ovoid, separated. Segment X simple, membranous. Inferior appendages elongate, slender, in ventral view with a medial notch on inner margin; in lateral view a knob dorsally at base, slender and tapered distally. Phallus short, down-turned medially.

Distribution. Eastern Vic. (Fig. 118).

Etymology. Latin, crena — notch or rounded projection.