California Department of Fish and Wildlife
Aquatic Biological Assement

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Epimetopidae Level 1 Level 2

Epimetopidae

Adults:

Larvae:

 

Key Characters (adult)

Some experts consider this to be a subfamily of Hydrophilidae. Rarely encountered; habitat not well known. Adults are small, 1.2-3.5 mm; the head is deflexed under a projecting pronotum; the eyes are divided; the pronotum and elytra are highly sculptured.
Key Characters (larva)

Larvae with well developed, 5-segmented legs, single claw; nine distinct abdominal segments; no spiracular atrium; labroclypeal margin symmetrical; pronotum with large, poorly-scleritized plate; plates of meso- and metanotum small, poorly scleritized; abdomen with little scleritization.
Tolerance unknown
Distribution CA, OR, WA, NV, AZ, Baja