Scott Optioservus Riffle Beetle
Photo by Kyle Gerstner
used by permission

Scott Optioservus Riffle Beetle
Optioservus phaeus

Federal Status:

State Status:

  • Range: Kansas range map for Scott Optioservus Riffle Beetle
    Dark Blue = Counties with designated critical habitat
    Light Blue = Historical records
  • Comments:  The only known place in the world where the Scott optioservus riffle beetle can be found is at Scott State Park. The Scott optioservus riffle beetle lives in cool water with a high concentration of dissolved oxygen. A short stretch of spring-fed stream is home to this diminutive beetle (0.1 inch length) which can be found clinging to rocks. The rocks provide the surface area where it grazes on diatoms and periphyton. The larva possesses gills at the tip of its abdomen and may remain at this stage for 2-3 years. After pupating, the adult beetle is winged and can fly short distances but soon returns to water and loses the ability to fly. Although the site is protected from development, the quantity and quality of groundwater entering the inhabited stream is of greater concern for the beetle’s continued survival.

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Kansas Wildlife Refuge
Text: Ed Miller and Bob Gress
Range Maps and Web Design: Jim Mason

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Great Plains Nature Center
6232 E. 29th Street North
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