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Charniodiscus was named by Ford (1958) [Sepkoski's age data: V u DIAGNOSIS: Disc-like organisms, usually 5-30 cms. in diameter, with a rough-surfaced central area surrounded by a smooth flange which may or may not bear concentric corrugations". REMARKS: "In spite of the possible association of this genus with the preceding [Charnia masoni] a separate name is given on morphological grounds".]. Its type is Charniodiscus concentricus.

It was assigned to Rangeomorpha by Sepkoski (2002); to Petalonamae by Hofmann et al. (2008); and to Arboreomorpha by Erwin et al. (2011).

Synonymy list
YearName and author
1958Charniodiscus Ford
2002Charniodiscus Sepkoski, Jr.
2008Charniodiscus Hofmann et al. p. 9
2011Charniodiscus Erwin et al. pp. Table S5

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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

No diagnoses are available