Temporal range: Sinemurian
The holotype of Ostenoteuthis siroi. Visible features include 10 arms, jaw, gladius, gills, displaced ink sac and lateral wing. (See notes on the image.)
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Coleoidea
Order: incertae sedis
Family: Ostenoteuthidae
Garassino & Donovan, 2000[1]

Ostenoteuthidae is an extinct family of cephalopods from Lower Jurassic of Italy. They have ten arms with unusual structure.[1]

Both known species are from Lower Sinemurian.[1]

The type locality for up to date known two species is near village Osteno, Lake Lugano, Province of Como, northern Italy.[1] Eight specimens from this family are stored in Museo Civico di Storia Naturale di Milan in Milan, Italy.[1]


  • Ostenoteuthis Garassino & Donovan, 2000[1]
  • Uncinoteuthis Garassino & Donovan, 2000[1]
    • Uncinoteuthis cuvieri Garassino & Donovan, 2000[1] - from Lower Sinemurian.[1]


  1. ^ a b c d e f g h i j k Garassino A. & Donovan D. T. (2000). "A New Family Of Coleoids From The Lower Jurassic Of Osteno, Northern Italy". Palaeontology 43(6): 1019-1038, 5 plates. doi:10.1111/1475-4983.00160. PDF

External links