RARE Undescribed Aglaspid from Cambrian Utah

Name: Undescribed Aglaspid

Phylum: Arthropoda; Subphylum: Chelicerata; Class: Merostomata; Order: Aglaspida

Geological Time: Upper Middle Cambrian, Cenomanian Stage

Size: 18 mm long by 7 mm wide on a 70 mm by 72 mm matrix pair

Fossil Locality: House Range, Weeks Formation, Millard County, Utah

AglaspidThis arthropod is an undescribed member of the Aglaspida. Aglaspids resemble the modern-day horseshoe crabs, and contain as the most famous member Beckwithia typa, a monsterous creature at over 20 cm in overall length that is thought to have been a predator of trilobites. Beckwithia was named after Frank Beckwith, editor and publisher of the Millard County Chronicle of Delta, Utah in the early to middle 1900s, a man with a passion for trilobites. Aglaspids are thought by some scientists to have made the trackways named Protichnites. This Aglaspid has trilobitomorph features, and has as yet not been described in the literature. Lacking only the spiked telson, this rare specimen is rendered even more so by the fact that both part and counterpart examples are preserved.

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