Ostenoteuthidae
Encyclopedia
Ostenoteuthidae is an extinct family of cephalopods from Lower Jurassic
Jurassic
The Jurassic is a geologic period and system that extends from about Mya to  Mya, that is, from the end of the Triassic to the beginning of the Cretaceous. The Jurassic constitutes the middle period of the Mesozoic era, also known as the age of reptiles. The start of the period is marked by...

 of Italy. They have ten arms with unusual structure.

Both known species are from Lower Sinemurian
Sinemurian
In the geologic timescale, the Sinemurian is an age or stage in the Early or Lower Jurassic epoch or series. It spans the time between 196.5 ± 2 Ma and 189.6 ± 1.5 Ma...

.

The type locality for up to date known two species is near village Osteno, Lake Lugano
Lake Lugano
Lake Lugano is a glacial lake in the south-east of Switzerland, at the border between Switzerland and Italy. The lake, named after the city of Lugano, is situated between Lake Como and Lago Maggiore...

, Province of Como
Province of Como
The Province of Como is a province in the north of the Lombardy region of Italy and borders the Swiss cantons of Ticino and Grigioni to the North, the Italian provinces of Sondrio and Lecco to the East, the Province of Milan to the south and the Province of Varese to the West...

, northern Italy
Northern Italy
Northern Italy is a wide cultural, historical and geographical definition, without any administrative usage, used to indicate the northern part of the Italian state, also referred as Settentrione or Alta Italia...

. Eight specimens from this family are stored in Museo Civico di Storia Naturale di Milan
Museo Civico di Storia Naturale di Milan
The Museo Civico di Storia Naturale di Milano was founded in 1838 whenGiuseppe de Cristoforis donated his collections to the city. Its first director was Giorgio Jan .-External links:*...

 in Milan, Italy.

Genera

  • Ostenoteuthis Garassino & Donovan, 2000
    • Ostenoteuthis siroi Garassino & Donovan, 2000 - from Lower Sinemurian
      Sinemurian
      In the geologic timescale, the Sinemurian is an age or stage in the Early or Lower Jurassic epoch or series. It spans the time between 196.5 ± 2 Ma and 189.6 ± 1.5 Ma...

      . ( photo)
  • Uncinoteuthis Garassino & Donovan, 2000
    • Uncinoteuthis cuvieri Garassino & Donovan, 2000 - from Lower Sinemurian
      Sinemurian
      In the geologic timescale, the Sinemurian is an age or stage in the Early or Lower Jurassic epoch or series. It spans the time between 196.5 ± 2 Ma and 189.6 ± 1.5 Ma...

      .
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