Ammonoidea
The Danubitaceae is a large and diverse superfamily in the Order Ceratitida

Ceratitida

The Ceratitida is an order that contains almost all ammonoid cephalopod genera from the Triassic as well as ancestral forms from the Upper Permian, the exception being the phylloceratids which gave rise to the great diversity of post Triassic ammonites....

 of the Ammonoidea that combines five families removed from the Ceratitaceae

Ceratitaceae

The Ceratitaceae is a superfamily in the ammonoid cephalopod order Ceratitida characterised in general by highly ornamented or tuberculate shells with ceratitic sutures that may become goniatitic or ammonitic s some offshoots....

, Clydonitaceae

Clydonitaceae

The Clydonitaceae is a superfamily in the ammonoid cephalopod order Ceratitida characterized by generally costate and turberculate shells with smooth, grooved, or keeled venters and sutures that are commonly ceratitic or ammonitic but goniatic in a few offshoots.-Taxonomy:The Clydonitaceae unites...

, and Ptychitaceae

Ptychitaceae

The Ptychitacheae is a superfamily of typically involute, subglobular to discoidal Ceratitida in which the shell is smooth with lateral folds or strigations, inner whorls are globose, and the suture is commonly ammonitic...

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Taxonomy

Superfamily Danubitaceae

• Fam. Aplococeratidae
• Fam. Danubitidae
• Fam. Lecanitidae
• Fam. Longobarditidae
  Longobarditidae
  The Longobarditidae is a family of molluscs known from the fossil record. It is the largest and most diverse family within the Danubitaceae, a superfamily in the ammonoid order Ceratitida...
  
  
• Fam. Nannitidae

The largest family in the Danubitaceae is the Longobarditidae with 11 genera distributed among three subfamilies plus three of undetermined placement. Smallest families are the Lecanitidae and Nannitidae, each represented by a single genus.

Distribution and Range

Fossils of the Danubitaceae have been found in the Triassic of Afghanistan, Russia, China, Papua New Guinea; Italy, Switzerland, Hungary; British Columbia, Yukon, Nunavut; Idaho, Nevada, and California.

References

• Classification of E. T. Tozer 1981 http://paleodb.org/cgi-bin/bridge.pl?action=startProcessPrintHierarchy&reference_no=18845&maximum_levels=100

E. T. Tozer. 1981. Triassic Ammonoidea: Classification, evolution and relationship with Permian and Jurassic Forms. The Ammonoidea: The evolution classification, mode of life and geological usefulness of a major fossil group 66-100

• Classification of E. T. Tozer 1994 http://paleodb.org/cgi-bin/bridge.pl?action=startProcessPrintHierarchy&reference_no=11541&maximum_levels=100

E. T. Tozer. 1994. Canadian Triassic Ammonoid Faunas. Geological Survey of Canada Bulletin 467:1-663

• Treatise on Invertebrate Paleontology, Part L, Ammonoidea. R. C. Moore (ed) Geol Soc of America and Univ of Kansas press, 1957.