Juvenile Beckwithia Cambrian Aglaspid Fossil

Beckwithia typa

Class Merostomata, Order Aglaspidida, Family: Beckwithiidae (Aglaspididae)

Geological Time: Upper Middle Cambrian

Size (25.4 mm = 1 inch): 25 mm long (if straight) by 12 mm wide on a 90 mm by 70 mm matrix

Fossil Site: Weeks Formation, Millard County, Utah

Fossil Code: RS153

Price: Sold

Juvenile Beckwithia Cambrian Aglaspid FossilDescription: This specimen is a rare example of the aglaspid Beckwithia. The aglaspids resemble the modern-day horseshoe crab, and include Beckwithia as their most famous member. Beckwithia achieved lengths of as much as 200 mm and is thought to have preyed upon trilobites. The genus derives its name from Frank Beckwith, editor of the Millard County Chronicle in the first half of the 20th century, and a trilobitophile. This one would have been hard put to devour many of its contemporary trilobites, but perhaps preyed upon immature examples.

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