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Grypania spiralis
Taxonomy
Helminthoidichnites spiralis was named by Walcott (1899). It is a compression fossil. Its type locality is Deep Creek Canyon, which is in a Calymmian marine horizon in the Greyson Formation of Montana.
It was recombined as Grypania spiralis by Walter et al. (1976).
It was recombined as Grypania spiralis by Walter et al. (1976).
Synonymy list
| Year | Name and author |
|---|---|
| 1899 | Helminthoidichnites spiralis Walcott p. 236 |
| 1976 | Grypania spiralis Walter et al. p. 877 |
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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.
†Grypania spiralis Walcott 1899
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Diagnosis
No diagnoses are available