墨西哥meggasorex gigas (Merriam, 1897)和Cryptotis magna (Merriam, 1895)的牙釉质微结构——与其他鼩鼱的牙釉质微结构比较

Q3 Earth and Planetary Sciences

Fossil Imprint Pub Date : 2019-12-01 DOI:10.2478/if-2019-0019

W. Koenigswald

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引用次数: 1

摘要

摘要本文描述了墨西哥狐猴(Megasorex)和隐齿猴(Cryptotis)臼齿的牙釉质微观结构，并与化石和新近发现的6种狐猴科齿釉质进行了比较。这些类型显示出与当前恙螨科系统的高度相关性。在巨齿龙中，相对简单的牙釉质以放射状牙釉质为主。然而，最内层极薄的分化牙釉质表明双层牙釉质的开始。这对应于Notiosorex-schmelzmuster。巨齿龙的牙齿缺乏色素沉着，这并没有反映在它的牙齿上。与白牙鳄的相似之处是肤浅的。隐球菌具有典型的衍生型伞蝇科的双层牙釉质。内层釉质的特殊类型及其棱柱强烈的侧向倾斜代表了高度衍生的Blarina-schmelzmuster的新变体。

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Tooth Enamel Microstructure in Megasorex gigas (Merriam, 1897) and Cryptotis magna (Merriam, 1895) from Mexico – In Comparison to the Schmelzmuster in other Shrews

Abstract The enamel microstructure of molars in Mexican soricines Megasorex and Cryptotis is described and compared to the six types of schmelzmuster found in fossil and recent Soricidae. These types of schmelzmuster show a high correlation to the current systematics of Soricidae. In Megasorex, the relatively simple schmelzmuster is dominated by radial enamel. However, a very thin innermost layer of differentiated enamel indicates the beginning of a two-layered schmelzmuster. This corresponds to the Notiosorex-schmelzmuster. The teeth of Megasorex lack pigmentation, which is not reflected in its schmelzmuster. Similarities to the white-toothed Crocidura-schmelzmuster are superficial. Cryptotis has the typical two-layered enamel of derived Soricinae. The specific enamel type of the inner layer and the strong lateral inclination of its prisms represent a new modification of the highly derived Blarina-schmelzmuster.

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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.