Pterobranchia - Cephalodiscida

Parent taxon: Pterobranchia according to J. Maletz 2014

See also Bulman 1970 and Sepkoski 2002

Sister taxa: Graptolithina, Mastograptus, Rhabdopleurida, Webbyites

Subtaxa: Cephalodiscidae

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Distribution: found only at Road-metal quarry ~ 6 km west of Smithton Aerodrome on Montagu Road at Scopus (Cambrian of Australia)

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