Chloroperlidae

Judson, Sarah W. & Nelson, C. Riley, 2012, 3541, Zootaxa 3541, pp. 1-118 : 23

Chloroperlidae

COMMON NAME: Green Sallies.

SIZE: Small to Medium (10–20 mm).

FEEDING GROUP: Predators.

TOLERANCE VALUE: 1 (Low).

DIAGNOSIS: Adults are bright yellow or green in life ( Fig. 90), this color fading to a dull yellow when preserved ( Fig. 81). Generally, size discrepancies can be used to separate the smaller Chloroperlidae from the larger Perlodidae to which they are most similar. Furthermore, wing venation can be used to distinguish the two families where chloroperlids have the second anal vein forked after it exits the anal cell, whereas in perlodids it forks before the anal cell and exits as two distinct veins. The epiproct of chloroperlid males is usually small and inflated at the apex ( Fig. 105) and either folds back on itself ( Fig. 93) or is directed towards the posterior ( Fig. 123). The female subgenital plate often extends past the posterior margin of sternum 8 ( Fig. 102). The body of nymphs is elongate with the pronotum only slightly wider than the abdomen. Nymphal wing pads do not diverge from midline and the outer margins can be circumscribed by an imaginary circle ( Fig. 20, 88). The cerci of nymphs are shorter than the abdomen and often point more medially than laterally ( Fig. 19) in preserved specimens. The paraglossae of the labium extend beyond the glossae and the labial palps are slender ( Fig. 8).

DISCUSSION: Most Chloroperlidae nymphs are restricted to cool, clean, flowing waters often in mountainous areas. They are typically found among stones and gravel, but can also be located in leaf packs and snags.