Tarphyceratidae
The Tarphyceratidae are tightly coiled, evolute Tarphycerida with ventral siphuncles. The dorsum is characteristically impressed where the whorl presses against the venter of the previous. The Tarphyceratidae are derived from Bassleroceras or possibly from some member of the Estonioceratidae. The Tarphyceratidae are known mainly from the Lower Ordovician (M-U Canad); gave rise to the Trocholitidae and provided the sources for the more advanced barrandeocerids
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Tarphyceratidae
The Tarphyceratidae are tightly coiled, evolute Tarphycerida with ventral siphuncles. The dorsum is characteristically impressed where the whorl presses against the venter of the previous. The Tarphyceratidae are derived from Bassleroceras or possibly from some member of the Estonioceratidae. The Tarphyceratidae are known mainly from the Lower Ordovician (M-U Canad); gave rise to the Trocholitidae and provided the sources for the more advanced barrandeocerids
has abstract
The Tarphyceratidae are tightl ...... more advanced barrandeocerids
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class
order (taxonomy)
phylum
Wikipage page ID
23,973,670
Wikipage revision ID
690,167,299
familia
Tarphyceratidae
familia authority
fossil range
subject
comment
The Tarphyceratidae are tightl ...... more advanced barrandeocerids
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label
Tarphyceratidae
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isPrimaryTopicOf
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Tarphyceratidae
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