Centrifugus
Extinct species of gastropod
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†Centrifugus is an extinct species of fossil sea snail, a marine gastropod mollusk in the family Euomphalidae, which paleontologists place in the order Archaeogastropoda.
| Centrifugus Temporal range: Upper Silurian | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Family: | †Euomphalidae |
| Genus: | †Centrifugus Bronn, 1934 |
This species was originally known from the Upper Silurian of northern Europe (Gotland).
Description
The shell has a nearly flat spire, and is widest across the base, which is marked by a peripheral keel. The upper side of the aperture has a narrow slit, and a selenizone located close to the upper suture. Five strong spiral cords alternating with weaker ones cover the upper surface of the shell.
References
- J.Brooks Knight et al. 1960. Systematic Descriptions. Treatise on Invertebrate Paleontology Part I Mollusca 1. Geological Society of America and University of Kansas Press.
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