尼日利亚东北部的一些新的和罕见的上白垩纪菊石

Journal of African Earth Sciences (and the Middle East) Pub Date : 1993-10-01 DOI:10.1016/0899-5362(93)90079-6

P.M.P. Zaborski

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引用次数: 15

摘要

尼日利亚东北部描述的菊石如下:Placenticeras (Karamaites) cumminsi Cragin(上Cenomanian)， Watinoceras aff.com coloradoense (Henderson)(基底Turonian)， Fikaites varicostatus gen. et sp. 11(上Cenomanian)， Rubroceras sp.(上Cenomanian)， Kamerunoceras turonense (d'Orbigny)(下-中Turonian边界)和Eotissotia simplex Barber(下至?中间土仑阶)。Fikaites属可能来源于Eucalycoceras Spath，是Cenomanian晚期和Turonian早期独立获得vascocerid型缝合模式的众多菊石之一。

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Some new and rare upper cretaceous ammonites from north-eastern Nigeria

The following ammonites are described from north-eastern Nigeria: Placenticeras (Karamaites) cumminsi Cragin (Upper Cenomanian), Watinoceras aff. coloradoense (Henderson) (basal Turonian), Fikaites varicostatus gen. et sp. nov. (Upper Cenomanian), Rubroceras sp. (Upper Cenomanian), Kamerunoceras turoniense (d'Orbigny) (Lower-Middle Turonian boundary) and Eotissotia simplex Barber (Lower to? Middle Turonian). The genus Fikaites is probably derived from Eucalycoceras Spath and is one of a number of ammonites independently acquiring a vascoceratid type suture pattern during Late Cenomanian and Early Turonian times.

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Journal of African Earth Sciences (and the Middle East)

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