Leuctridae

Judson, Sarah W. & Nelson, C. Riley, 2012, 3541, Zootaxa 3541, pp. 1-118 : 28-29

Leuctridae

COMMON NAME: Needleflies.

SIZE: Small (6–10 mm).

FEEDING GROUP: Shredders.

TOLERANCE VALUE: 0 (Low).

DIAGNOSIS: Adult slender and dark brown in color with wings rolled around the abdomen ( Fig. 135). Nymph elongate ( Fig. 18) with pronotum only slightly wider than abdomen. Abdominal segments 7–9 without membranous pleural fold ( Fig. 17). Paraglossa and glossa subequal, bordered by robust labial palps.

DISCUSSION: Leuctridae nymphs usually occur in smaller streams and prefer microhabitats of gravel interstices and detritus in areas of swift current. Nymphs are not commonly collected except when they are close to emergence.