Aphetoceras
Aphetoceras is a genus of tarphycerid cephalopod within the Estonioceratidae; loosely coiled without an impression along the dorsal margin; early whorls barely reaching, separating then diverging in the final mature whorl; weakly ribbed in some. The cross section of Aphetoceras is higher than wide, making it compressed in form. The dorsum, along the inner curve, is more broadly rounded than the venter which lies along the outer curve. The siphuncle is relatively large, located near but not at the ventral margin; lined with secondary deposits. Chambers are empty.
ArenigList of prehistoric nautiloid generaList of the Paleozoic life of MissouriList of the Paleozoic life of New York (state)List of the Paleozoic life of TennesseeList of the Paleozoic life of TexasList of the prehistoric life of MissouriList of the prehistoric life of New York (state)List of the prehistoric life of TennesseeList of the prehistoric life of TexasTarphycerida
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Aphetoceras
Aphetoceras is a genus of tarphycerid cephalopod within the Estonioceratidae; loosely coiled without an impression along the dorsal margin; early whorls barely reaching, separating then diverging in the final mature whorl; weakly ribbed in some. The cross section of Aphetoceras is higher than wide, making it compressed in form. The dorsum, along the inner curve, is more broadly rounded than the venter which lies along the outer curve. The siphuncle is relatively large, located near but not at the ventral margin; lined with secondary deposits. Chambers are empty.
has abstract
Aphetoceras is a genus of tarp ...... n El Paso Group in New Mexico.
@en
鬆卷角石(學名:Aphetoceras)是一屬已滅絕的鸚鵡螺類。牠們生活在晚奧陶紀的海洋中。其化石分布於北美及中國。
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class
family
kingdom
order (taxonomy)
phylum
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15,789,032
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991,266,481
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classis
Cephalopoda
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familia
genus
Aphetoceras
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genus authority
Hyatt, 1894
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image caption
Artist's reconstruction of A. americanum
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ordo
phylum
Mollusca
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regnum
Animalia
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subclassis
Nautiloidea
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subject
hypernym
comment
Aphetoceras is a genus of tarp ...... deposits. Chambers are empty.
@en
鬆卷角石(學名:Aphetoceras)是一屬已滅絕的鸚鵡螺類。牠們生活在晚奧陶紀的海洋中。其化石分布於北美及中國。
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label
Aphetoceras
@en
鬆卷角石
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