Species

Cylindrichnus concentricus Toots, 1966

Taxon description

Howard & Frey, 1984

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