法国西南部坎帕尼亚历史层型的白垩纪微孔舌口苔藓虫

IF 1.5 3区地球科学 Q2 PALEONTOLOGY Geodiversitas Pub Date : 2022-05-12 DOI:10.5252/geodiversitas2022v44a18

P. Taylor, L. Villier

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引用次数: 0

摘要

法国西南部的坎帕尼亚地区拥有丰富多样的苔藓虫组合，对追踪从环口虫到口口虫优势的动物转换具有全球重要性。然而，对这个坎帕尼亚阶段的历史层型地区的苔藓虫研究甚少，Alcide d'Orbigny在19世纪50年代建立的大多数物种仍未修订。在这里，我们重点研究了四种具有紧致隐晶前壁的anascana级cheilostomes，通常归类于Microporidae科。介绍了一新属和两新种:Platelinella solea n. gen. et n. sp和Micropora mikesmithi n. sp。对法国西南部的神秘属Dimorphomicropora Ducasse & Vigneaux, 1960和两个种(D. voigti Ducasse & Vigneaux, 1960和D. crestulata (Ducasse, 1958))进行了修订。在D. voigti中存在的下颌多形体类似于steginoporela的b类动物，但不太可能是同源的。

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Cretaceous microporid cheilostome bryozoans from the Campanian historical stratotype of southwest France

ABSTRACT The Campanian of southwest France hosts rich and diverse bryozoan assemblages of global importance in tracing the faunal turnover from cyclostome to cheilostome dominance. Nevertheless, bryozoans from this historical stratotype region for the Campanian stage have been poorly studied, and most of the species erected by Alcide d'Orbigny in the 1850s remain unrevised. Here we focus on the four species of anascan-grade cheilostomes with opesiulate cryptocystal frontal walls, conventionally classified in the family Microporidae. One new genus and two new species are introduced: Platelinella solea n. gen. et n. sp. and Micropora mikesmithi n. sp. The enigmatic genus Dimorphomicropora Ducasse & Vigneaux, 1960 and the two species (D. voigti Ducasse & Vigneaux, 1960 and D. crestulata (Ducasse, 1958)) from southwest France are revised. Mandibulate polymorphs present in D. voigti resemble the B-zooids of Steginoporella but are unlikely to be homologous.

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来源期刊

Geodiversitas 地学-古生物学

CiteScore

3.00

自引率

5.60%

发文量

审稿时长

>12 weeks

期刊介绍： Geodiversitas is a fully electronic journal, with a continuous publication stream, devoted to varied aspects of Earth Sciences. It publishes original results particularly on systematics, phylogeny, paleobiodiversity and paleoenvironment. Thematic issues may also be published under the responsibility of a guest editor.