Penion crawfordi
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| Penion crawfordi Temporal range: Middle to Late Miocene, | |
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| An embedded fossil of Penion crawfordi at Cape Palliser, New Zealand. | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Family: | Austrosiphonidae |
| Genus: | Penion |
| Species: | †P. crawfordi |
| Binomial name | |
| †Penion crawfordi (Hutton, 1873) | |
| Synonyms[1] | |
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Penion crawfordi is an extinct species of marine snail or whelk, belonging to the true whelk family Austrosiphonidae.[2] [3][1][2]
Penion crawfordi is a large, extinct species of Penion siphon whelk.[1] Shells of P. crawfordi have spine-like, dorso-ventrally compressed nodules on the shell spire.[1]
(Original description) The shell is ovato-fusiform in shape and is distantly marked by spirally striated patterns. It consists of five whorls, where those of the spire appear distinctly flattened. Each of these spire whorls bears a row of tubercles located near the anterior suture, though this feature is largely covered up by the subsequent ventral whorl.
The body whorl is notably inflated and keeled, featuring a prominent row of nine large tubercles situated directly on the keel. Positioned just in front of them is a similar row of smaller tubercles. The aperture is oval in form, leading into what appears to be a short siphonal canal. [4]
