Argonauta joanneus
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| Argonauta joanneus Temporal range: Middle Miocene | |
|---|---|
| Type specimen (lateral and keel views) | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Order: | Octopoda |
| Family: | Argonautidae |
| Genus: | Argonauta |
| Species: | †A. joanneus |
| Binomial name | |
| †Argonauta joanneus | |
Argonauta joanneus is an extinct species of octopus assigned to the genus Argonauta. It was described in 1915 based on fossil material from the Middle Miocene of Austria.[1][2] It was found in fine sandy clay.[1]
The type specimen, a fossilised eggcase, measures 84 mm in diameter at its widest point but is only 18 mm thick.[1] The mouth is 48 mm wide.[1]