California Department of Fish and Wildlife
Aquatic Biological Assement

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Helophoridae Level 1 Level 2





Key Characters (adult)

Some experts consider this to be a subfamily of Hydrophilidae. Found in both lotic and lentic habitats. Adults distinguished by pronotum with seven prominent, longitudinal grooves; eyes large, body elongate; size ranging from 2.6-3.8 mm; antennae with 8 or 9 segments, the last three segments forming a loose club.

Key Characters (larva)

Larvae live in soil at water’s edge. Larvae with well developed, 5-segmented legs, single claw; 9 distinct abdominal segments; urogomphi 3-segmented, elongate; no spiracular atrium.

Tolerance unknown