Phacops rana crassituberculata Stumm, 19533D Model
Phacops rana crassituberculata Stumm, 1953
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More model informationCMNH 2502, Phacops rana crassituberculata Stumm, 1953
Age: Middle Devonian (Givetian) Rock unit: Silica Shale of the Traverse Group
Locality: Sylvania, Lucas Co., OH
This specimen is an example of 1 of the 2 subspecies of Phacops found in the Silica Shale, the other being P. r. milleri Stewart, 1927. The trilobite’s length is almost 10 cm. Phacops rana is the state fossil of Pennsylvania.
Image by Jacob Kordeleski, CMNH Dept of Archaeology // Hawken School
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