ベレムナイト(箭石)類 Belemnites

 ベレムナイト類は,三畳紀に現れて白亜紀末に絶滅したグループです.イカに近い仲間だったと考えられています.この化石は「矢石/箭石」とも呼ばれます.
 Belemnites are a group that appeared in the Triassic and became extinct at the end of the Cretaceous. They are thought to have been closely related to squids. This fossil is also called "yaishi" intend arrowstone.


ジュラ紀 Jurassic

GSJ F07627 [ベレムナイト類 Belemnites]

Belemnopsis hastata(Blainville)

 【ベレムノプシス】

 ジュラ紀(Jurassic)

 産地:Rothenburg, Federal Republic of Germany(ドイツ)


白亜紀 Cretaceous

GSJ F07641 [ベレムナイト類 Belemnites]

Belemnitella americana(Morton)

 【ベレムニテラ】

 地層:Navesink Formation/白亜紀(Cretaceous)

 産地:Poricy Brook, New Jersey, U.S.A.(アメリカ)