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Archaeichnium
Taxonomy
Archaeichnium was named by Glaessner (1963) [Sepkoski's age data: V u]. It is considered to be a form taxon.
It was assigned to Ichnofossils by Hantzschel (1975); to Cnidaria by Sepkoski (2002); and to Mackenziidae by Runnegar et al. (2024).
It was assigned to Ichnofossils by Hantzschel (1975); to Cnidaria by Sepkoski (2002); and to Mackenziidae by Runnegar et al. (2024).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1963 | Archaeichnium Glaessner p. 117 |
| 1975 | Archaeichnium Hantzschel |
| 2002 | Archaeichnium Sepkoski |
| 2024 | Archaeichnium Runnegar et al. pp. 31 - 33 |
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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
| Reference | Diagnosis | |
|---|---|---|
| W. Hantzschel 1975 | Fillings of cylindrical burrows with external longitudinal striation (10 to 12 striae), faint transverse sculpture inside; diameter (max) about 5 mm, thickness of walls 1 mm. | |
| B. Runnegar et al. 2024 | Narrow conical organism with about 10–12 longitudinal ridges that may be the edges of, and internally septate, pleated body wall, possibly enclosed in similarly corrugated unmineralized epitheca. |