†family Stereoplasmoceratidae Kobayashi 1934 (mollusk)

Cephalopoda - Orthocerida - Stereoplasmoceratidae

Parent taxon: Pseudorthocerataceae according to C. Teichert et al. 1964

See also Crick 1981 and Sweet 1958

Sister taxa: Cyrtactinoceratidae, Mysterioceratidae, Songkanocerasidae

Subtaxa: Stereoplasmoceras Stereoplasmocerina

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Ecology: nektonic carnivore

Distribution:

• Arenig of China (4 collections)

• Ordovician of China (9), Norway (3)

• Tremadoc of China (1)

Total: 17 collections including 20 occurrences

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