| Argonauta joanneus Temporal range: Middle Miocene
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|---|---|
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| Type specimen (lateral and keel views) | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Order: | Octopoda |
| Family: | Argonautidae |
| Genus: | Argonauta |
| Species: | †A. joanneus
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| 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]
- ^ a b c d e (in German) Hilber, V. 1915. "Der älteste bekannte und erste miozäne Argonauta" (PDF). Mitteilungen des naturwissenschaftlichen Vereins für Steiermark 51: 107–110.
- ^ Martill, D.M. & M.J. Barker 2006. A paper nautilus (Octopoda, Argonauta) from the Miocene Pakhna Formation of Cyprus. Palaeontology 49(5): 1035-1041. doi:10.1111/j.1475-4983.2006.00578.x