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・ Oxynoemacheilus hamwii
・ Oxynoemacheilus insignis
・ Oxynoemacheilus kermanshahensis
・ Oxynoemacheilus kosswigi
・ Oxynoemacheilus leontinae
・ Oxynoemacheilus mediterraneus
・ Oxynoemacheilus namiri
・ Oxygent
・ Oxygen–hemoglobin dissociation curve
・ Oxyglobin
・ Oxyglychus
・ Oxygnathopsis
・ Oxygnathus
・ Oxygonia
・ Oxygonia annulipes
Oxygonioceras
・ Oxygoniola
・ Oxygonitis
・ Oxygonium
・ Oxygonum
・ Oxygymnocypris stewartii
・ Oxygyne
・ Oxygyne triandra
・ Oxygyrus keraudrenii
・ Oxygène
・ Oxyhammus
・ Oxyhydrogen
・ Oxyhyperglycemia
・ Oxyjulis californica
・ Oxylaena


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


''Oxygonioceras'' is a genus in the Oncocerid family, Brevicoceratidae, from the Middle Silurian of North America and Europe.
''Oxygonioceras'', named by Foeste, 1925, has a loosely coiled, dextrally torticonic shell with a rounded dorsum on the inside of the spiral and an angular or subangular venter on the outside; suture with broad lateral lobes and ventral siphuncle with expanded, nummuloidal segments.
Although also torticonically gyroconic -- having an out of plane open spiral - ''Oxygonioceras'' differs from Naedyceras and closely related genera in that the siphuncle segments are empty, rather than being actinosiphonate.
==See also==

*List of nautiloids

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Oxygonioceras」の詳細全文を読む



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