美国马里兰州卡尔弗特悬崖新近纪罕见畸形鹰鳐齿板(齿形目:齿形科)报告

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-05-10 DOI:10.2110/carnets.2022.2206

S. J. Godfrey, D. Bohaska, J. Maisey

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引用次数: 1

摘要

本文报道了在美国马里兰州Calvert Cliffs附近的中新世沉积物中发现的一个孤立的、变形的鹰鳐(aeomylaeus sp.， Myliobatidae, Myliobatiformes)的下齿板。像这样变形的myliobatid齿板，无论是化石还是现代，都是极其罕见的。所有中间的牙齿都变形/歪斜，使得每颗牙齿的右侧与牙板的横轴形成约10度的角。USNM PAL 726325中牙齿的歪斜异常形式不被认为是现代或埋藏变形的结果。相反，USNM PAL 726325显示的畸形给出了每一个迹象，表明连续的类似畸形牙齿是由于牙板的持续解剖畸形造成的。从每颗牙齿变形形状的一致性来看，似乎牙板至少在牙板年龄所代表的时间内保持了这种异常形状。如果这种解释是正确的，那么畸形不是致命的，并且在个体寿命的延长部分(或全部)中不会显著损害牙齿路面的功能。

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The report of a rare deformed eagle ray (Myliobatiformes: Myliobatidae) tooth plate from the Neogene of Calvert Cliffs, Maryland, U.S.A.

An isolated and deformed lower tooth plate of an eagle ray (Aetomylaeus sp., Myliobatidae, Myliobatiformes) is reported herein from the Miocene deposits along Calvert Cliffs, Maryland, U.S.A. Deformed myliobatid tooth plates like this, either fossil or modern, are exceedingly rare. All medial teeth are deformed/skewed such that the right side of each tooth forms an angle of about 10 degrees to the transverse axis of the dental plate. The skewed abnormal form of the teeth in USNM PAL 726325 is not thought to be the result of modern or taphonomic deformation. Rather, the deformity exhibited by USNM PAL 726325 gives every indication that successive similarly deformed teeth came about as a result of a persistent anatomical deformity of the dental lamina. From the consistency in the deformed shape of each tooth, it would appear as though the dental lamina retained this anomalous shape at least throughout the time represented by the age of the tooth plate. If this interpretation is correct, the deformity was not fatal and did not significantly impair the functionality of the tooth pavement over a protracted part (or all) of the individual's life span.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.