Atractelmis

Atractelmis
Atractelmis on image N.O 58 and N.0 59

Vulnerable (NatureServe)[1]
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Suborder: Polyphaga
Infraorder: Elateriformia
Family: Elmidae
Genus: Atractelmis
Chandler, 1954[2]
Species:
A. wawona
Binomial name
Atractelmis wawona
Chandler, 1954[2]

Atractelmis is a genus of riffle beetles in the family Elmidae. The genus is monotypic, the sole species being Atractelmis wawona,[3][4] also known as the Wawona riffle beetle.[1][5] It is endemic to the Western United States between California, Oregon, and Idaho.[1][5] The specific name wawona refers to its type locality, Wawona in the Yosemite National Park.[2]

Habitat

Atractelmis wawona occur in riffles of rapid clear mountain streams at 600–1,500 m (2,000–5,000 ft) above sea level.[1] Adults and larvae occur in the same microhabitats and are typically found in aquatic mosses, particularly Platyhypnidium riparioides.[6] These beetles are easily overlooked but can be locally numerous.[1]

Description

Adults measure about 2 mm (0.079 in) in length and 0.9 mm (0.035 in) in width. They are shiny black above with four red spots on the elytra.[2] The larvae can grow to 4.8–5 mm (0.19–0.20 in) in length.[6]

References

  1. ^ a b c d e "Atractelmis wawona Wawona Riffle Beetle". NatureServe. 10 October 2025. Retrieved 20 October 2025.
  2. ^ a b c d Chandler, H. P. (1954). "New genera and species of Elmidae (Coleoptera) from California". Pan-Pacific Entomologist. 30 (2): 125–131. ISSN 0031-0603.
  3. ^ "Atractelmis Chandler, 1954". Integrated Taxonomic Information System. Retrieved 20 October 2025.
  4. ^ "Atractelmis Chandler, 1954". Global Biodiversity Information Facility. Retrieved 20 October 2025.
  5. ^ a b Shepard, W. D.; Barr, Cheryl B. (1991). "Description of the larva of Atractelmis (Coleoptera: Elmidae) and new information on the morphology, distribution, and habitat of Atractelmis wawona Chandler". Pan-Pacific Entomologist. 67 (3): 195––199.

Further reading

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