Mosasaurs (Squamata: Mosasauridae) from the Upper Cretaceous of the Southern Urals

IF 0.7 4区 地球科学 Q4 PALEONTOLOGY
D. V. Grigoriev, N. G. Zverkov, A. V. Nikiforov
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引用次数: 0

Abstract

The study of new finds of mosasaurids from the Izhberda locality (Southern Urals, Orenburg Region) has made it possible to record for the first time the presence of mosasaurs from the subfamilies Mosasaurinae, Tylosaurinae, and Plioplatecarpinae from the Upper Cretaceous of the Orenburg Region, including representatives of the genera Mosasaurus, Prognathodon, and Clidastes, which are known from the Upper Cretaceous of North America and Western Europe. Of interest is the discovery of the tylosaurine Taniwhasaurus, previously known from New Zealand, Antarctica, South Africa, and Japan. Therefore, the Campanian mosasaurid fauna of the Southern Urals is intermediate and includes North American–European and Asia–Pacific taxa. However, all the finds of mosasaurs from the Izhberda locality can only be identified in open nomenclature, which makes detailed comparisons of the faunas difficult. Revision of the type series of mosasaur Liodon rhipaeus Bogolyubov, 1910 from the Southern Urals has allowed us to conclude that, in addition to the three mosasaurian vertebrae, it includes the ischium and posterior fragment of the mandible of a plesiosaur. Liodon rhipaeus is clearly a nomen dubium and the vertebrae of its type series cannot be identified more precisely than Tylosaurinae indet.

Abstract Image

南乌拉尔地区上白垩世的沧龙(有鳞类:沧龙科
摘要通过对伊日伯达(乌拉尔南部,奥伦堡地区)新发现的沧龙类的研究,首次记录了奥伦堡地区上白垩世的沧龙亚科、泰龙亚科和Pliioplatecarpinae中的沧龙类,包括北美和西欧上白垩世已知的沧龙属、Prognathodon属和Clidastes属的代表。令人感兴趣的是发现了泰龙类 Taniwhasaurus,这种龙以前已知产于新西兰、南极洲、南非和日本。因此,南乌拉尔地区的钟乳期沧龙类动物群是一个中间类群,包括北美-欧洲类群和亚太类群。然而,从伊兹贝尔达地区发现的所有沧龙只能以开放命名法进行鉴定,这使得对动物群进行详细比较变得困难。通过对乌拉尔南部的沧龙 Liodon rhipaeus Bogolyubov, 1910 的模式系列进行修订,我们得出结论:除了三块沧龙脊椎骨外,它还包括一块长颈龙的颚骨和下颌骨的后部残片。Liodon rhipaeus 显然是一个疑名,其模式系列的脊椎骨不能比 Tylosaurinae indet.
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来源期刊
Paleontological Journal
Paleontological Journal 地学-古生物学
CiteScore
1.20
自引率
33.30%
发文量
70
审稿时长
6-12 weeks
期刊介绍: Paleontological Journal (Paleontologicheskii zhurnal) is the principal Russian periodical in paleontology. The journal publishes original work on the anatomy, morphology, and taxonomy of fossil organisms, as well as their distribution, ecology, and origin. It also publishes studies on the evolution of organisms, ecosystems, and the biosphere and provides invaluable information on global biostratigraphy with an emphasis on Eastern Europe and Asia.
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