Tremichnus Brett, 1985
| ID | 13226 |
|---|---|
| Fossil group | Bioerosional trace fossils |
| Taxon | Tremichnus |
| Author | Brett, 1985 |
| Reference | Brett, 1985 |
| Parent taxon | Centrichnidae |
| FAD | Dapingian |
| LAD | Callovian |
Includes:
| Species | Reference |
|---|---|
| Tremichnus cysticus | Brett, 1985 |
| Tremichnus excavatus | Donovan & Jagt, 2003 |
| Tremichnus minutus | Brett, 1985 |
| Tremichnus paraboloides | Brett, 1985 |
| Tremichnus puteolus | Brett, 1985 |
Description(s)
Brett, 1985:
Circular pits or embedment structures of varying diameter (about 0.1 to 4.0 mm) occurring on the plates of echinoderms, primarily crinoids, with or with out associated thickening or gall-like deformation of the plates. Pits regularly parabolic in cross section, with diameter/depth ratios variable from about 0.1–1.0; no internal expansion or other ramifications. Holes always oriented perpendicularly to external plate surfaces, tapering in ward; generally not penetrating through plates. Adjacent pits
may over lap one an other.
Wisshak et al., 2015:
Emended diagnosis. Circular pits, generally wider than deep, perpendicularly bored into ossicles of echinoderms.
Knaust, 2012a:
Unbranched, circular, bioerosional trace.
Buatois et al., 2017:
Category of architectural design: 2.63. Circular holes and pit-shaped borings.
Specimens with images (6)
