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Calodiscus helena
Taxonomy
Microdiscus helena was named by Walcott (1890). Its type specimen is USNM 18361 and is a 3D body fossil.
It was recombined as Calodiscus helena by Lemke (2020).
It was recombined as Calodiscus helena by Lemke (2020).
Sister species lacking formal opinion data
Synonymy list
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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.
†Calodiscus helena Walcott 1890
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Diagnosis
No diagnoses are available