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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 Eodiscus helena by Raymond (1913); it was recombined as Paradiscus helena by Kobayashi (1943); it was recombined as Calodiscus helena by Rasetti (1952), Lemke (2020).
It was recombined as Eodiscus helena by Raymond (1913); it was recombined as Paradiscus helena by Kobayashi (1943); it was recombined as Calodiscus helena by Rasetti (1952), 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
Measurements
No measurements are available
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| Source: g = genus, o = order | |||||
| References: Hendy 2009, Kiessling 2004 | |||||