德国Messel鼠类Masillamys Tobien, 1954，早始新世晚期至中始新世早期，48-47 M.Y.分类地位的再评价

Q3 Earth and Planetary Sciences

Fossil Imprint Pub Date : 2019-12-01 DOI:10.2478/if-2019-0028

M. Vianey-Liaud, Laurent Marivaux, T. Lehmann

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引用次数: 1

摘要

摘要本文阐明了Tobien（1954）所称的Messel Masillamys属三个物种的鉴定，并使用更新的术语对其诊断和鉴别牙齿特征进行了修订。根据比正模标本（M.beegeri）保存得更好的标本，该属的眶下区域似乎更具hystrimorphous而非sciuromorphous。由于该属具有共同的牙齿特征，如下臼齿上有一个长而斜的耳冠后突或出现一个金属孔I，上臼齿上下臼齿相对发育良好，以及hystrimorphiy，特别是与Hartenbergeromys和Pantrogna，Masillamys在这里被包括在基底Theridomorpa中。

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A Reevaluation of the Taxonomic Status of the Rodent Masillamys Tobien, 1954 from Messel (Germany, Late Early to Early Middle Eocene, 48–47 M.Y.)

Abstract This paper clarifies the identification of the three species referred by Tobien (1954) to the genus Masillamys from Messel, and more specifically provides a revision of their diagnosis and differential dental features, using an updated terminology. Based on specimens better preserved than the holotype (M. beegeri), it appears that this genus had an infraorbital area more hystricomorphous than sciuromorphous. As the genus shares dental features – like a long oblique postprotocristid or the occurrence of a metalophid I on the lower molars, the relatively well-developed hypocone on the upper molars, as well as hystricomorphy –, notably with Hartenbergeromys and Pantrogna, Masillamys is here included among the basal Theridomorpha.

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来源期刊

Fossil Imprint Earth and Planetary Sciences-Stratigraphy

CiteScore

1.70

自引率

0.00%

发文量

期刊介绍： Fossil Imprint (formerly Acta Musei Nationalis Pragae, Series B – Historia Naturalis) is an international, open access journal, publishing original papers and reviews of any length from all areas of paleontology and related disciplines, such as palaeoanthropology, biostratigraphy, palynology, and archaeobotany/zoology. All taxonomic groups are treated, including plants, invertebrates, vertebrates, microfossils, and ichnofossils, with a special emphasis on terrestrial and post-Palaeozoic marine biota. We encourage the publication of international meetings as well as special thematic issues. The aim of the journal is to spread the scientific knowledge with no restrictions, and to allow access to it to any interested person. Each article includes information about the date of receiving, accepting and issue.