| Benacoceras Temporal range: U Jurassic (Kimm) |
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|---|---|
| Conservation status | |
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Fossil
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Ammonoidea |
| Superfamily: | Perisphinctaceae |
| Family: | Aspidoceratidae |
| Genus: | Benacoceras Spath, 1925 |
Benacoceras is a strongly ribbed, evolute ammonite from the Late Jurassic, coiled so that all whorls are exposed. Ribbing is biplicate, with very short secondaries. The venter, the outer rim, is smooth, at least on the outer whorl.