Rare Complete Coosella Type I Trilobite from Weeks Formation

Coosella sp.nov. (Coosella Type I)

Class Trilobita; Trilobite Order Ptychopariida; Suborder Ptychopariina; Superfamily Ptychoparioidea; Family Crecicephalidae

Geological Time: Middle Cambrian

Size: 40 mm long by 30 mm wide on a 170 mm by 200 mm matrix

Fossil Site: Weeks Formation, Millard County, Utah

Coosella Trilobite from Weeks FormationThis trilobite is a rare member of the family Crecicephalidae known as Coosella Type I. It has not as yet been sceientifically described, so the species has not yet been named. It differs from another from the region, known as Coosella Type 2 by virtue of a straighter thoracic profile and wider pygidium.

click trilobite pictures to enlarge

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