Species

Cylindrichnus concentricus Toots, 1966

Taxon description

Diagnosis Long, subcylindrical to subconical burrows, straight to gently curved, vertical to horizontal, having concentrically layered walls.

Synonymy list

1962 Cylindrichnus concentricus ichnosp. nov. — Toots , pp. 94 , fig. 5-7

1966 Cylindrichnus concentricus — Howard , fig. 10

1970 Cylindrichnus concentricus — Frey & Howard , fig. 7b

1974 Cylindrichnus concentricus Howard 1966 — Fürsich , pp. 31-32 , fig. Fig. 26, 27

1982 Cylindrichnus concentricus — Frey & Howard , fig. 2E

1985 Cylindrichnus concentricus Howard 1966 — Frey & Howard , pp. 377

1985 Cylindrichnus concentricus Toots, 1962 — Frey & Howard , pp. 378 , fig. 8-1; 9

1986 Cylindrichnus concentricus Toots, 1962 — D'Alessandro & Bromley , pp. 77 , fig. 10:1; 15:2

1990 Cylindrichnus concentricus Toots, 1962 — Frey & Howard , pp. 814 , fig. 17-1, 19-3

1996 Cylindrichnus concentricus Howard 1966 — Paczesna , pp. 56-57 , fig. Plate 4:3-6

2011 Cylindrichnus concentricus Toots, 1962 — Ekdale & Harding , pp. 130 , fig. 1, 2

2015 Cylindrichnus concentricus Toots in Howard, 1966 — Ekdale & Harding , pp. 429 , fig. 2,3

2021 Cylindrichnus concentricus Toots in Howard, 1966 — Knaust , pp. 7A-G

Classification