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・ Branching quantifier
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Branchiostoma
・ Branchiostoma floridae
・ Branchiostoma lanceolatum
・ Branchiostomidae
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・ Branchless banking
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・ BranchOut
・ Branchpoint Binding Protein
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Branchiostoma : ウィキペディア英語版
Branchiostoma

''Branchiostoma'' is one of the few living genera of lancelets (order Amphioxiformes). It is the type genus of family Branchiostomidae.
These small vaguely eel- or snake-like animals are close relatives of vertebrates. The scientific name means "gill-mouth", referring to their anatomy – unlike vertebrates, they do not have a true head (with a skull capsule, eyes, nose, a well-developed brain etc.), but merely a mouth adjacent to the gill-slits, with the slightly enlarged anterior end of the dorsal nerve cord above and in front of them.
Like all lancelets, they are filter feeders that hide in the sediment most of the time. The genus inhabits coastal waters e.g. of the North Atlantic.
==Species==

* ''Branchiostoma belcheri''
* ''Branchiostoma californiense''
* ''Branchiostoma capense''
* ''Branchiostoma caribaeum''
* ''Branchiostoma clonaseum''
* ''Branchiostoma floridae''
* ''Branchiostoma lanceolatum''
* ''Branchiostoma minucauda''
* ''Branchiostoma moretonensis''
* ''Branchiostoma valdiviae''
* ''Branchiostoma virginiae''
Lancelet biodiversity is not very well studied; other as yet undescribed species (perhaps including cryptic species) might await discovery.

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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