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Helenia
Taxonomy
Helenia was named by Walcott (1890) [Sepkoski's age data: Cm Atda-u Cm Boto Sepkoski's reference number: 1006]. Its type is Helenia bella.
It was assigned to Hyolithidae by Fisher (1962); and to Hyolithida by Sepkoski (2002).
It was assigned to Hyolithidae by Fisher (1962); and to Hyolithida by Sepkoski (2002).
Species
H. bella (type species)
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.
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, p = phylum | |||||
| References: Hendy et al. 2009, Kiessling 2004 | |||||