Balticeras Temporal range:
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Scientific classification | |
Kingdom: | Animalia
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Phylum: | Mollusca
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Class: | Cephalopoda
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Subclass: | Ammonoidea
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Order: | Ammonitida
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Family: | Perisphinctidae
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Genus: | Balticeras Dohm, 1925
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Species[2] | |
None cataloged |
Balticeras is an involute, discoidal Upper Jurassic (Oxfordian) ammonite[1] (order Ammonitida) found in England, Germany, and Switzerland, belonging to the Perisphinctidae. The shell is strongly embracing, tending to be oxyconic (sharp rimmed). Sides are gently curved, converging on a narrow to sharp ventral rim.
Balticeras is considered by some to be a subgenus of Ringsteadia which in contrast is more evolute, with ribbed inner whorls. Both are included in the Pictoniinae, a subfamily established by Spath, 1924, for large ammonites within the Perisphinctidae, tending to develop smooth middle and outer whorls.