Species
Caulostrepsis biforans (Gripp, 1967)
Taxon description
Hillmer & Schultz, 1973
Diagnose: Wie für die Gattung. Häufig im Vorderteil des Ganges vier parallele Reihen von grübchenformigen Kammern.
Blissett & Pickerill, 2007
Diagnosis– (Translation from the original German; after Hillmer & Schulz, 1973, p.10) “Long, blindly ending, slightly curved, tubular boring. Cross-section of the distal end is weakly dumb-bell to oval-shaped. At the proximal end of the trace four parallel rows of dimple-shaped chambers may occur.”
Description– Borings Y-shaped with circular apertural openings. The diameter of each aperture on individual specimens is constant. For the figured specimen the diameter is c. 110 μm. The borings are perpendicular to the substrate surface.
Synonymy list
1967 Polydora biforans — Gripp , pp. 9, fig. 1:3-5
1968 Polydora biforans — Gripp , pp. 378, fig. 7, 10, 11
1972 Trypanites biforans — Bromley , pp. 96, fig. 1j
1973 Ramosulcichnus biforans — Hillmer & Schulz , pp. 10
2007 Ramosulcichnus biforans (Gripp, 1967) — Blisset & Pickerill , pp. 94, fig. 4:4
2017 Ramosulcichnus biforans (Gripp, 1967) — Wisshak et al. , fig. 6b-d
2019 Caulostrepsis biforans — Wisshak et al.
2024 Caulostrepsis biforans (Gripp, 1967) — Knaust & Schnick , pp. 13, fig. 6G
Selection of related publications
Knaust, D., Schnick, H. 2024. Trace fossils from the Maastrichtian chalk of the Isle of Rügen, north-east Germany. Geologie en Mijnbouw 103, DOI:10.1017/njg.2024.6
Blissett, D. J., Pickerill, R. K. 2007. Systematic ichnology of microborings from the Cenozoic White Limestone Group, Jamaica, West Indies. Scripta Geologica 134, 77-108.
Hillmer, G., Schultz, M. G. 1973. Ableitung der Biologie und Ökologie eines Polychaeten der Oberkreide durch Analyse des Bohrganges Ramosulcichnus biforans (Gripp) nov. ichnogen [The biology and ecology of a polychaete of the upper Cretaceous through the analysis of core material of Ramosulcichnus biforans; new ichnogenus]. Mitteilungen aus dem Geologisch-Paläontologischen Institut der Universität Hamburg 42, 5–24.
Classification
| Organism group | Biota |
| Ichnofossil group | Ichnofossils |
| Bioerosional trace fossils | |
| Family | Osteichnidae |
| Genus | Caulostrepsis |
| Species | avipes |
| biforans | |
| contorta | |
| cretacea | |
| penicillus | |
| spiralis | |
| taeniola | |
| unranked | dunbari |
References based on distribution
- Hillmer & Schultz, 1973 Kronsmoor quarry Maastrichtian
- Knaust & Schnick, 2024 Rügen Maastrichtian
- Blissett & Pickerill, 2007 Eocene