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Helicolithus
Taxonomy
Helicolithus was named by Hantzschel (1962).
It was assigned to Ichnofossils by Hantzschel (1975); and to Eiffellithaceae by Bown and Young (1997).
It was assigned to Ichnofossils by Hantzschel (1975); and to Eiffellithaceae by Bown and Young (1997).
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1962 | Helicolithus Hantzschel |
| 1975 | Helicolithus Hantzschel |
| 1997 | Helicolithus Bown and Young |
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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.
G. †Helicolithus Hantzschel 1962
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. Hantzschel 1975 | Small, meandering, screw-shaped burrows; diameter of tunnels 1 mm; diameter of spiral up to about 3 mm; somewhat similar to Helocodromites but much smaller; Helicolithus fabregae Azpeitia Moros resembling Belorhaphe Fuchs, but with sharp turns. |