Penion proavitus
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| Penion proavitus Temporal range: Paleocene, | |
|---|---|
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Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Family: | Austrosiphonidae |
| Genus: | Penion |
| Species: | P. proavitus |
| Binomial name | |
| Penion proavitus | |
| Synonyms | |
Penion proavitus is an extinct species of marine snail or whelk, belonging to the true whelk family Austrosiphonidae.[1][2][3][4][5]
Penion proavitus fossils are the earliest known specimens of Penion siphon whelks.[3][4] The species was medium-to-large in size.[2][5]
It is possible that fossils of Penion proavitus represent a stem lineage that was the common ancestor of Penion, Kelletia and Antarctoneptunea, instead of a species of Penion itself.[4]
