Ostenoteuthidae
| Ostenoteuthidae Temporal range: Sinemurian |
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| The holotype of Ostenoteuthis siroi. Visible features include 10 arms, jaw, gladius, gills, displaced ink sac and lateral wing. () | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Coleoidea |
| Order: | incertae sedis |
| Family: |
†Ostenoteuthidae Garassino & Donovan, 2000 |
Ostenoteuthidae is an extinct family of cephalopods from Lower Jurassic of Italy. They had ten arms with unusual structure.
Both known species are from Lower Sinemurian.
The type locality for up to date known two species is near village Osteno, Lake Lugano, Province of Como, northern Italy. Eight specimens from this family are stored in Museo Civico di Storia Naturale di Milano in Milan, Italy.
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