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Words near each other
・ Trochetiopsis melanoxylon
・ Trochia
・ Trochia cingulata
・ Trochidae
・ Trochidrobia
・ Trochidrobia inflata
・ Trochidrobia minuta
・ Trochidrobia punicea
・ Trochidrobia smithi
・ Trochila
・ Trochilics
・ Trochilinae
・ Trochilocharax ornatus
・ Trochilus
・ Trochilus (mythology)
Trochina
・ Trochinella
・ Trochiodes
・ Trochiscia
・ Trochisciopsis
・ Trochistis
・ Trochita
・ Trochita trochiformis
・ Trochitenkalk Formation
・ Trochlea
・ Trochlea of humerus
・ Trochlea of superior oblique
・ Trochlear fovea
・ Trochlear nerve
・ Trochlear notch


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Trochina : ウィキペディア英語版
Trochina

The Trochina is a taxon that is used by paleontologists. It is a suborder of primitive sea snails, marine gastropod mollusks.
==Description==
These snails have mostly conically coiled shells in which the spire is typically low to moderate in height. More rarely the shell is discoidal in coiling. The outer lip simple. The internal layers of the shell are aragonitic and nacreous, in some species completely so. The operculum, where known, is calcareous or corneous, and spiral in structure.〔Knight J. B. et al. (1960). Systematic Descriptions, Treatise on Invertebrate Paleontology. Part I(1).〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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