Geographic-parthenogenesis

Guides

• Bromius obscurus

  Western Grape Rootworm, Brown and Black Beetle

  Bromius obscurus is a small leaf beetle (Chrysomelidae: Eumolpinae) and the sole member of its genus. It is a Holarctic species with a notable geographic parthenogenesis pattern: North American populations reproduce sexually while European populations are triploid and reproduce asexually. The species is recognized as a pest of grape vines in Europe and western North America. Adults possess a stridulatory apparatus on the wings, the first documented in the subfamily Eumolpinae.

  leaf-beetleChrysomelidaeEumolpinaegrape-pestparthenogenesisgeographic-parthenogenesisHolarcticsymbiotic-bacteriastridulationvineyard-pest

• Townsendia

  grounddaisies

  Townsendia is a North American genus of perennial herbs in the Asteraceae family, commonly known as grounddaisies. Species typically form low-growing rosettes with showy capitula and exhibit specialized reproductive strategies including sexual diploidy and apomictic polyploidy. Some species display narrow edaphic specialization, such as T. lemhiensis which is restricted to ashy white soils in Idaho. The genus shows patterns of geographic parthenogenesis linked to glacial history.

  AsteraceaeAstereaegrounddaisiesNorth-Americaapomixispolyploidygeographic-parthenogenesisedaphic-specialization