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Cylindrichnus

Taxonomy
Cylindrichnus was named by Toots (1966).

It was assigned to Ichnofossils by Hantzschel (1975).

Synonymy list
YearName and author
1966Cylindrichnus Toots
1975Cylindrichnus Hantzschel

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RankNameAuthor
Ichnofossils
RankNameAuthor
genusCylindrichnusToots 1966

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
ReferenceDiagnosis
W. Hantzschel 1975Subconical 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 Late/Upper Oligocene or 520.00000 to 23.03000 Ma

Collections (6 total)


Time interval Ma Country or state Original ID and collection number
Tommotian - Atdabanian530.0 - 516.0India C. sp. (10740)
Atdabanian520.0 - 516.0Spain C. concentricus (153167 153168)
Botomian516.0 - 513.0Poland C. operosus (153009)
Tithonian - Neocomian152.1 - 130.0Canada (British Columbia) C. sp. (41191)
Late/Upper Oligocene28.4 - 23.03Japan (Yamaguchi) C. japonicus (51450)