Species

Cylindrichnus concentricus Toots, 1966

Taxon description

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

Synonyymit

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

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