Protocycloceratidae
Protcycloceratidae is an extinct family of slender, commonly annulate, members of the cephalopod order Ellesmerocerida that lived during the Early Ordovician. Protocycloceratidae, named by Kobayashi (1935), are characterized by transversely ribbed, elongate shells that may be straight or slightly curved, as to be either endogastric or exogastric. Although not universally accepted, Kröger and Mutvie (2005) revised the Protocycloceratidae to include only those ellesmerocerids that have straight transverse sutures and siphuncles with concave segments and thick connecting rings.
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Protocycloceratidae
Protcycloceratidae is an extinct family of slender, commonly annulate, members of the cephalopod order Ellesmerocerida that lived during the Early Ordovician. Protocycloceratidae, named by Kobayashi (1935), are characterized by transversely ribbed, elongate shells that may be straight or slightly curved, as to be either endogastric or exogastric. Although not universally accepted, Kröger and Mutvie (2005) revised the Protocycloceratidae to include only those ellesmerocerids that have straight transverse sutures and siphuncles with concave segments and thick connecting rings.
has abstract
Protcycloceratidae is an extin ...... crinoceratidae (Flower, 1964).
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kingdom
order (taxonomy)
phylum
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25,960,088
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831,829,005
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classis
Cephalopoda
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familia
Protocycloceratidae
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familia authority
Kobayashi, 1935
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fossil range
Lower Ordovician
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ordo
phylum
Mollusca
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regnum
Animalia
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subclassis
subdivision
*see text
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subdivision ranks
Genera
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subordo
Ellesmeroceratina
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hypernym
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Protcycloceratidae is an extin ...... ts and thick connecting rings.
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label
Protocycloceratidae
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