Sonniniidae is a diverse family of Middle Jurassic ammonites ranging from those with stout evolute shells to those whose shells are sharply rimmed, oxyconic. The keel, which runs along the middle of the venter, is typically hollow. Sutures vary from simple to complex. The aptychus is shiny with coarse folds (Cornaptychus).

Sonniniidae
Temporal range: Middle Jurassic
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Superfamily: Hildoceratoidea
Family: Sonniniidae
Buckman, 1892
Genera

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Sonniniidae are included in the superfamily Hildoceratoidea. Most lived during the middle Bajocian stage. Distribution is worldwide except for boreal.

Taxonomy

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Sonniniidae is divided into subfamilies with 10 genera.[1]

Distribution

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Argentina, Canada, China, Germany, Hungary, Morocco, Saudi Arabia, Spain, the United Kingdom.[2]

References

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  1. ^ Sonniniidae entry
  2. ^ "Paleobiology Database". Retrieved 2014-05-28.