斯里兰卡乌叶猴（Macaca sinica aurifrons）中上颌第四磨牙的存在。

The presence of maxillary fourth molar in the Sri Lankan toque monkey (Macaca sinica aurifrons).

作者信息

Gabadage Dinesh E, Rodrigo Kalangi, Manamendra-Arachchi Kelum N, Premarathne Sonali Rangika

机构信息

Biodiversity Conservation Society, Nugegoda, Sri Lanka.

Department of History and Archaeology, Faculty of Humanities and Social Sciences, University of Ruhuna, Matara, Sri Lanka.

出版信息

J Med Primatol. 2021 Aug;50(4):216-218. doi: 10.1111/jmp.12527. Epub 2021 May 7.

DOI:10.1111/jmp.12527

PMID:33963572

Abstract

We describe the presence of fourth molar teeth in the upper jaw of a subspecies (Macaca sinica aurifrons) of the endemic toque macaque of Sri Lanka. Compared to the first three molars, supernumerary ones were smaller by more than 50%, showed four cuspids in the crowns, and had three roots. This observation contributes to knowledge of orthodontic anomalies presence in primate populations while spotlighting the importance of osteological observation.

摘要

我们描述了斯里兰卡特有帽猴的一个亚种（食蟹猕猴金色亚种）上颌中第四磨牙的存在情况。与前三颗磨牙相比，额外的磨牙尺寸小了50%以上，牙冠上有四个尖，并有三根牙根。这一观察结果有助于了解灵长类种群中正畸异常的存在情况，同时突出了骨学观察的重要性。