Stenelmis sexlineata
Sanderson, 1938
riffle beetle
Stenelmis sexlineata is a riffle beetle in the Elmidae, described by Sanderson in 1938. It inhabits flowing water environments in North America and has a multi-year with distinct larval stages. Like other elmid beetles, it is adapted to life in fast-moving streams and rivers.

Pronunciation
How to pronounce Stenelmis sexlineata: /stəˈnɛlmɪs sɛksˌlɪniˈeɪtə/
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Images
Habitat
Flowing water environments, specifically riffles—shallow, fast-moving sections of streams and rivers with rocky or gravel substrates.
Distribution
North America.
Life Cycle
Multi-year with distinct larval stages. Detailed duration and number of instars not specified in available sources.