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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Cylindrichnus
Taxonomy
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1966 | Cylindrichnus Toots |
| 1975 | Cylindrichnus Hantzschel |
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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. †Cylindrichnus Toots 1966
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†Cylindrichnus concentricus Toots 1966
†Cylindrichnus operosus Ortowski 1989
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. Hantzschel 1975 | Subconical form, weakly curved, circular to oval in cross section with diameter of 10 to 20 mm, most commonly 12 to 15 mm; central core 2 to 4 mm; exterior wall composed of concentric layers; preserved in full relief; orientation from nearly horizontal to vertical. |
Measurements
No measurements are available
No ecological data are available
Age range: base of the Atdabanian to the top of the Zanclean or 521.00000 to 3.60000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Tommotian - Atdabanian | India | C. sp. (10740) | |
| Atdabanian | Spain | C. concentricus (153167 153168) | |
| Botomian | Poland | C. operosus (153009) | |
| Tithonian - Neocomian | Canada (British Columbia) | C. sp. (41191) | |
| Late/Upper Oligocene | Japan (Yamaguchi) | C. japonicus (51450) | |
| Zanclean | Spain (Andalusia) | C. concentricus (232725) |