Wikipedia
Beckwithia may refer to:
- Beckwithia (arthropod), an arthropod genus in the order Aglaspidida
- Beckwithia (plant), a plant genus in the family Ranunculaceae
Beckwithia is a genus of plants of the buttercup family. Most botanists consider it synonymous to a clade consisting of Ranunculus glacialis and Ranunculus andersonii. B. glacialis has several distinct forms that may also be considered subspecies or closely related species. However, molecular studies have supported the placement of B. glacialis and B. camissonis within Ranunculus, distant from B. andersonii.
Beckwithia is an extinct genus of average to large size ( to ), soft bodied basal chelicerate arthropods that lived during the late Middle and Upper Cambrian on the former paleocontinent Laurentia, in what are now Utah and Wisconsin. It has an inverted egg-shape, with a semi-circular head, 11 abdominal segments and a tail spine. It is a typical member of the group Aglaspidida.