Tremichnus Brett, 1985
Wisshak et al., 2019a
Macroboring; substrate calcareous; tracemaker invertebrate
Buatois et al., 2017
Category of architectural design: 2.63. Circular holes and pit-shaped borings.
Knaust, 2012a
Unbranched, circular, bioerosional trace.
Wisshak et al., 2015
Emended diagnosis. Circular pits, generally wider than deep, perpendicularly bored into ossicles of echinoderms.
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.
| Organism group | Biota |
| Ichnofossil group | Ichnofossils |
| Bioerosional trace fossils | |
| Family | Centrichnidae |
| Genus | Augoichnus |
| Centrichnus | |
| Lacrimichnus | |
| Ophthalmichnus | |
| Solealites | |
| Solichnus | |
| Tremichnus | |
| Species | cysticus |
| excavatus | |
| minutus | |
| paraboloides | |
| puteolus |
- Vinn et al., 2015b Sepise outcrop Jaagarahu Stage
- Vinn et al., 2015c Hilliste Quarry Juuru Stage
- Rozhnov, 1989 Babino quarry Leningrad district Volkhov Stage
- Rozhnov, 1989 Putilovo quarry, Leningrad Oblast Volkhov Stage
- Franzén, 1974 Klinteberg, Gotland
- Franzén, 1974 Visby, Gotland
- Franzén, 1974 Håftingsklint, Gotland
- Franzén, 1974 Follingbo, Gotland