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・ Euthymius II Karmah
・ Euthymius II of Constantinople
・ Euthymius II of Novgorod
・ Euthymius III of Chios
・ Euthymius of Athos
・ Euthymius of Constantinople
・ Euthymius of Constantinople (disambiguation)
・ Euthymius of Sardis
・ Euthymius of Tarnovo
・ Euthymius the Great
・ Euthymius Zigabenus
・ Euthymol
・ Euthyna
・ Euthyneura
・ Euthyneura (genus)
Euthyneury
・ Euthynnus
・ Euthynnus affinis
・ Euthynnus lineatus
・ Euthynotus
・ Euthynteria
・ Euthyone
・ Euthyone celenna
・ Euthyone dremma
・ Euthyone grisescens
・ Euthyone melanocera
・ Euthyone muricolor
・ Euthyone parina
・ Euthyone perbella
・ Euthyone placida


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Euthyneury : ウィキペディア英語版
Euthyneury
Euthyneury is a plesiomorphic condition present in some gastropods which is a result of two evolutionary events. The first event, which was experienced by the ancestors of all extant gastropods, is known as torsion. Torsion describes the event in which the intestines, heart, nephridia, gills, and nerve cords "twisted" causing some organs to migrate from the animal's left to its right in order to accommodate the relocation of the mantle cavity close to the animal's head. Torsion created a condition in the cerebrovisceral commissures called streptoneury. Secondarily, some gastropod lineages ''detorted'': they reversed the torsion event and straightened out their internal organs, uncrossing the commissures in the process. It is this second state, one in which the commissures have once again become untwisted, that is called ''euthyneury''.
The Opisthobranchia represent one of the more prominent gastropod lineages that have undergone euthyneury.

==References==


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「Euthyneury」の詳細全文を読む



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