Subvestinautilus
| Subvestinautilus Temporal range: L Carboniferous (Miss)
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| Genus: | Subvestinautilus Turner, 1954
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Subvestinautilus is a genus of evolute koninckioceratids, in the order Nautilida, with a depressed, trapezoidal whorl section. The venter is broadly rounded, ventrolateral shoulders sharply rounded, flanks flattened and converging toward a narrow rounded dorsum. In early growth stages a keel forms on the umbilical shoulder which becomes rounded or marked by a longitudal rib at maturity . The suture has a broadly rounded ventral lobe and a deeper lateral lobe.
Subvestinautilus, named by Turner, 1954, has been found in the Lower Carboniferous of Ireland and the Isle of Man.
References
- Bernhard Kummel, 1964. Nautiloidea-Nautilida. Treatise on Invertebrate Paleontology, Part K. Geological Soc. of America and University of Kansas press. Teichert and Moore (eds)
- Koninckioceratidae-Paleodb
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