A description of a Denazinemys nodosa specimen (Testudinata, Baenidae) from the Late Cretaceous Kaiparowits Formation of southern Utah

IF 1.9 4区 地球科学 Q1 PALEONTOLOGY
Fossil Record Pub Date : 2023-07-31 DOI:10.3897/fr.26.102520
Gaël E. Spicher, J. Sertich, Léa C. Girard, W. Joyce, T. Lyson, Y. Rollot
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Abstract

Denazinemys nodosa is a Late Cretaceous representative of the North American turtle clade Baenidae diagnosed, among others, by a shell surface texture consisting of raised welts. We provide a detailed description of a partial skeleton from the late Campanian Kaiparowits Formation of Utah, USA, including bone-by-bone analysis of its cranium based on images obtained using micro-computed tomography. A revised phylogenetic analysis confirms placement of Denazinemys nodosa close to Eubaena cephalica and Boremys spp. within the clade Eubaeninae. Comparison with a second skull from the Kaiparowits Formation previously assigned to Denazinemys nodosa questions its referral to this taxon. An assortment of specimens from the Early to Late Campanian of Mexico and the USA had previously been referred to Denazinemys nodosa based on shell surface texture alone, even though this characteristic is known to occur in other baenids. Our review of all available material concludes that Denazinemys nodosa is currently only known from the Late Campanian of New Mexico and Utah.
A犹他州南部晚白垩世Kaiparowits组Denazinemys nodosa标本(Testudinata, Baenidae)的描述
Denazinemys nodosa是白垩纪晚期北美洲龟类分支Baenidae的代表,其中包括由凸起的凹槽组成的壳表面纹理。我们提供了来自美国犹他州坎帕尼亚晚期Kaiparowits组的部分骨骼的详细描述,包括基于使用微计算机断层扫描获得的图像对其头盖骨的逐骨分析。一项修正的系统发育分析证实了Denazinemys nodosa在真贝亚分支中的位置接近头真贝亚和Boremys sp .。与先前归属于Denazinemys nodosa的Kaiparowits组的第二个头骨进行比较,质疑其与该分类单元的关系。来自墨西哥和美国早至晚坎帕尼亚的标本分类先前仅根据壳表面纹理被称为Denazinemys nodosa,尽管已知这种特征也存在于其他贝类中。我们对所有可用材料的回顾得出结论,Denazinemys nodosa目前仅在新墨西哥州和犹他州的晚坎帕尼亚期被发现。
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来源期刊
Fossil Record
Fossil Record PALEONTOLOGY-
CiteScore
3.60
自引率
7.10%
发文量
18
审稿时长
14 weeks
期刊介绍: Fossil Record (FR) is the palaeontological journal of the Museum für Naturkunde Berlin. This journal was founded in 1998 under the name Mitteilungen aus dem Museum für Naturkunde Berlin, Geowissenschaftliche Reihe and appears with two issues each year. Fossil Record publishes original papers in all areas of palaeontology including the taxonomy and systematics of fossil organisms, biostratigraphy, palaeoecology, and evolution. All taxonomic groups are treated, including invertebrates, microfossils, plants, and vertebrates.
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