Oichnus simplex Bromley, 1981
| ID | 13354 |
|---|---|
| Fossil group | Bioerosional trace fossils |
| Taxon | Oichnus simplex |
| Author | Bromley, 1981 |
| Reference | Bromley, 1981a |
| Parent taxon | Oichnus |
Type specimens
| Type | No | Type locality | Type horizon | Remarks | Reference | ||||
|---|---|---|---|---|---|---|---|---|---|
| holotype | Geological Museum, University of Copenhagen | MGUH 15 35 1 | Ivö quarry, Skåne, Sweden | Campanian | Bromley, 1981a |
Description(s)
Donovan & Jagt, 2003:
Diagnosis: Oichnus having a simple cylindrical or subcylin-drical form, axis more or less perpendicular to the substrate sur-face. Where the substrate is not fully penetrated, the distal end is flattened hemispherically (after Bromley, 1981, p. 60),
Bromley, 1981a:
Diagnosis: Oichnus having a simple cylindrical or subcylindrical form, axis more or less perpendicular to the substrate surface. Where the substrate is not penetrated right through, the distal end is flattened hemispherical.
Blissett & Pickerill, 2007:
Diagnosis – (After Bromley, 1981, p. 60.) “Circular to subcircular holes of biogenic origin bored into hard substrates. The holes may pass right through the substrate as a penetration, where the substrate is a thin shell; or end within the substrate as a shallow to deep depression or short, subcylindrical pit.”
Description – Circular to oval, vertically oriented borings. The majority of these borings do not totally penetrate the substrate. Diameters vary between 70-350 μm.
Pokorný & Štofik, 2017:
Emended diagnosis: Sedilichnus having a simple cylindrical or subcylindrical form, axis more or less perpendicular to the substrate surface. The distal ends of the pits terminate within the substrate; those of the partially penetrating holes are flat or slightly concave (after Bromley, 1981).