Genus
Conotubus hemiannulatus Zhang et Lin, 1986
Taxon description
Cai et al., 2011
Emended diagnosis: Gently curved conotubular fossil, with an open aperture and a rounded apex that often penetrates into sediments. The rounded apex appears to be anchored in sediments. Original tube wall probably not mineralized, and consists of a series of nested funnel-shaped cylinders. The cylinders show some transverse annulations. The cylinders are circular in cross section view. Successive cylinders overlap one other and as many as three cylinders may be encountered at any given transverse section of the tubes.
Selection of related publications
Vinn, O., Nanglu, K., Wilson, M. A., Isakar, M., Toom, U. 2025. Ediacaran-type non-mineralized tube-dwelling organisms persisted into the early Cambrian (Terreneuvian) in Baltica. Gondwana Research 137, 29-35. DOI:10.1016/j.gr.2024.09.009
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Classification
| Organism group | Biota |
| Incertae sedis (fossils) | |
| Family | Cloudinidae |
| Genus | Conotubus |
| hemiannulatus |
References based on distribution
- Vinn et al., 2025a Virtsu 360 borehole Lontova Stage
- Vinn et al., 2025a Vanaküla F-130 borehole Lontova Stage
- Vinn et al., 2025a Vanamõisa F-149 borehole, Lääne-Virumaa Lontova Stage
- Vinn et al., 2025a Kunda quarry Lontova Stage