†Holcacephalus Resser 1938 (trilobite)
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Trilobita - Ptychopariida - Norwoodiidae
Parent taxon: Norwoodiidae according to P. A. Jell and J. M. Adrain 2002
See also Sepkoski 2002
Sister taxa: Cedaraspis, Hardyoides, Levisaspis, Norwoodella, Norwoodia, Paranorwoodia
Subtaxa: none
Ecology: fast-moving low-level epifaunal suspension feeder
Distribution:
• Cambrian of Canada (1: Quebec collection), Kazakhstan (3), United States (15: Georgia, Pennsylvania, Texas, Wyoming)
Total: 19 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
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