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首页> 外文期刊>Neues Jahrbuch fur Geologie und Palaontologie. Abhandlungen >Rare and new Late Bathonian (Middle Jurassic) ammonites from Monte Kumeta, western Sicily
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Rare and new Late Bathonian (Middle Jurassic) ammonites from Monte Kumeta, western Sicily

机译:来自西西西西部蒙特·库马塔的罕见和新的沐浴妇(中侏罗腊士岛)氨化

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摘要

The Middle Jurassic sequence of the West Sicilian Monte Kumeta contains a faunal level with a very rich Late Bathonian ammonite assemblage. The typical Tethyan fauna with many representatives of phylloceratids and lytoceratids also yielded oppeliids, perisphinctids and other diagnostic forms (incl. the index Prohecticoceras blanazense Elmi, 1967) to date the assemblage as the lower, Blanazense Subzone of the Prohecticoceras retrocostatum Zone. The probably lower position of the assemblage within the Retrocostatum Zone precedes the general appearance of the Bathonian heteromorph genus Parapatoceras, thus two new genera (Kumetaceras n. gen, with type species K. enigmaticum n. sp. and Sikeliceras n. gen. with type species S. costatum n. sp.) are of special interest from the point of view of the origin and/or dimorphism of Bathonian-Callovian heteromorphs. Other new forms are also described: the strigoceratid Phlycticeras tenue n. sp., the oppeliid Paroecotraustes minor n. sp. and the perisphinctid Sicilisphinctes n. gen. (with type species S. incertus n. sp.) and Albanesiceras n. gen. (with type species A. damianoi n. sp.). Some other, rare ammonites are described in detail, further forms are figured and discussed shortly.
机译:西西西里蒙特·克莫纳的中间侏罗纪序列含有一个粪便水平,具有非常丰富的深层浴室氨氨铁矿组合。典型的Tethyan Fauna具有许多植物植物肽和氯化雷氏菌和氯化肽的典型特性,也产生了对抗,意外探测器和其他诊断表格(包括指数Prohecticoceras Blanazense Elmi,1967),以使得Prohecticoceras Retrocostatum区的下层膨胀子Zhizone。在浴冬异常区内的组装中的大致较低位置在浴室异常的普通外观之前,因此是两个新的属(Kumetaceras n。Gen,用型物种K. Enigmaticum n。sp。和锡卡利拉斯ñ。type物种S. Costatum n。)来自Bathonian-Callovian异常的起源和/或二态性的观点来说是特殊的兴趣。还描述了其他新形式:血管肽普利替氏蛋白酶Tenue n。 SP。,Oppeliid Paroecotraustes次要n。 SP。和意外的sicilisphictes n。 Gen。 (用型物种S. Incertus n。sp。)和阿尔巴西西亚ñ。 Gen。 (用型物种A. Damianoi n。SP。)。一些其他,详细描述了稀有氨基,不久将进一步讨论并讨论。

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