Orthaspidoceras

Orthaspidoceras
Temporal range: {{Kimmeridgian}}
Fossil shell of Orthaspidoceras schilleri, on display at Galerie de paléontologie et d'anatomie comparée in Paris
Scientific classification
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Superfamily: Perisphinctoidea
Family: Aspidoceratidae
Genus: Orthaspidoceras
Spath 1925

Orthaspidoceras is an extinct ammonoid cephalopod genus belonging to the family Aspidoceratidae.

These nektonic carnivores lived during the Jurassic period, Kimmeridgian age.[1]

Description

Shells of Orthaspidoceras are medium or large-sized, with a diameter reaching about 20–25 centimetres (7.9–9.8 in). These shells are relatively involute and thick, with a quadrate-rounded or depressed whorls. The ornamentation consists of a row of coarse tubercles and fine streaks.[2]

Species

[2]

References

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