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Parakionoceras
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・ Parakmeria yunnanensis
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・ Parakneria cameronensis
・ Parakneria spekii
・ Parakneria tanzaniae
・ Parakoimomenos


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Parakionoceras : ウィキペディア英語版
Parakionoceras

''Parakionoceras'' is an extinct nautiloid that lived during the Silurian and Devonian in what is now Europe; included in the orthoceratoid family Kionoceratidae in the Treatise part K, 1964 but removed to the Arionoceratidae in Kröger 2008.
''Parakionoceras'' has a long, faintly curved, exogastric shell with relatively long camerae and straight transverse sutures. The surface is lined with sharp-edged longitudinal ribs separated by broader concave inner areas. The siphuncle is slightly eccentric; necks short and loxochoantitic, directed slightly inward; connecting rings slightly inflated. Cameral deposits well developed.
==''References''==

* Sweet, Walter C. 1964. Nautiloidea-Orthocerida. Treatise on Invertebrate Paleontology, Part K. Geological Soc of America, and Univ Kansas Press.
*(Parakionoceras -Paleobio db )


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