Nemouridae

Judson, Sarah W. & Nelson, C. Riley, 2012, 3541, Zootaxa 3541, pp. 1-118 : 30

Nemouridae

COMMON NAME: Forestflies.

SIZE: Small to medium (5–20 mm).

FEEDING GROUP: Shredders.

TOLERANCE VALUE: 2 (Low).

DIAGNOSIS: Adults are dark brown in life, with distinct “X” vein pattern at the cord of the wing Nymphs are generally stout, golden to dark brown in color, and appear hairy ( Fig. 146). Some genera have gills present on the neck ( Fig. 146) between the thorax and head which are sometimes retained as shriveled remnants in adults. Nymphal wings pads diverge greatly from midline ( Fig. 12). Tarsal segment 2 is much shorter than segment 1( Fig. 10). Mouthparts ( Fig. 7) with subequal paraglossa and glossa and with robust labial palps.

DISCUSSION: Nemourids are most common in small coldwater streams, but they can also be found in larger rivers and lake edges. They are usually found in leaf packs, roots, and snags. Most nemourids emerge in late spring and summer although some emerge in the fall.