新西兰白垩纪短颈蛇颈龙的修正

IF 1.2 4区地球科学 Q3 PALEONTOLOGY

Comptes Rendus Palevol Pub Date : 2023-03-14 DOI:10.5852/cr-palevol2023v22a6

undefined José Patricio O’GORMAN, R. Otero

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引用次数: 1

摘要

Polycotylidae Cope, 1869是短颈蛇颈龙的一个分支，在白垩纪晚期实现了世界性的分布。本文对新西兰上白垩世的Polycotylidae/Pliosauridae资料进行了综述，认为在这些地层(Campanian-Maastrichtian Tahora组晚期和Campanian-Maastrichtian Conway组)中发现的蛇颈龙标本分别只有2.4%和7.7%属于Polycotylidae。这一比例与Allen、Los Alamitos和La Colonia组、巴塔哥尼亚北部(阿根廷)和智利最南端的Campanian-Maastrichtian地层上的记录相似，但与同期南极洲和智利中部Campanian-Santonian地层中多尾虫的缺失形成对比。这些新结果提高了我们对威德利亚多子叶体的认识，并强调了威德利亚省坎帕尼亚-马斯特里赫特记录的相对稀缺性。

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Revision of the short-necked Cretaceous plesiosaurians from New Zealand

Polycotylidae Cope, 1869 is a clade of short-necked plesiosaurians that achieved a cosmopolitan distribution by the Late Cretaceous. Here, the material previously referred to Polycotylidae/Pliosauridae from the Upper Cretaceous of New Zealand is reviewed, concluding that only 2.4% and 7.7% respectively of the total plesiosaurians specimens recovered in these formations (late Campanian-early Maastrichtian Tahora Formation and Campanian-Maastrichtian Conway Formation) belong to Polycotylidae. This proportion is similar to that recorded in upper Campanian-Maastrichtian levels of the Allen, Los Alamitos and La Colonia formations, northern Patagonia (Argentina) and southernmost Chile, but contrasts with the coeval absence of polycotylids in Campanian-Santonian levels of Antarctica and central Chile. These new results improve our knowledge about the representation of Weddellian polycotylids and underline the relative scarcity of Campanian-Maastrichtian records in the Weddellia Province.

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来源期刊

Comptes Rendus Palevol 地学-古生物学

CiteScore

2.10

自引率

0.00%

发文量

审稿时长

17.6 weeks

期刊介绍： Comptes Rendus Palevol is a fully electronic and peer-reviewed journal, with a continuous publication stream, devoted to palaeontology, prehistory and evolutionary sciences. It publishes original research results, in French or English, in the following domains: systematic and human palaeontology, prehistory, evolutionary biology and macroevolution, and history of sciences. Thematic issues may also be published under the responsibility of a guest editor. All articles published in Comptes Rendus Palevol are compliant with the different nomenclatural codes. A copyright assignment will be signed by the authors before publication.