Department of Anatomy, Faculty of Veterinary Medicine, Universitas Gadjah Mada, Yogyakarta, Indonesia.
Institute of Anatomy and Cell Biology, Julius Maximilian University of Würzburg, Wuerzburg, Germany.
Anat Histol Embryol. 2021 Sep;50(5):801-811. doi: 10.1111/ahe.12724. Epub 2021 Jun 29.
The Horsfield's treeshrew (Tupaia javanica) is one of the shrews found on the island of Java that mainly feeds on fruits and occasionally insects. This shrew has an important role in the ecosystem as it spreads plant seeds and controls insects. To this day, there is no available knowledge about the structure of Horsfield's treeshrew's tongue. Therefore, the aim of this study was to provide data on the tongue structure of the Horsfield's treeshrew through two different methods. We investigated the tongue morphology and lingual papillae distribution of Tupaia javanica using 1) scanning electron microscopy (SEM) for microscopic structure and 2) histology for microscopic organization. Our macroscopic results revealed that the tongue of Tupaia javanica can be divided into three parts: apex, corpus and radix. The dorsal surface of the medial corpus is the median groove extending to the radix. Observation using SEM and light microscopy (LM) showed that the apex of the tongue bears three types of papillae: scale-like filiform, small filiform and fungiform. These are rosette filiform papillae, cornflower filiform papillae, conical papillae and fungiform papillae in the corpus. Meanwhile, the radix contains small filiform papillae, scale-like filiform papillae, vallate papillae, conical papillae and fungiform papillae. On the lateral posterior radix, Weber's gland reacts positively to PAS reaction. Taking together, our research shows that there are variations in the papillae on the tongue surface of Horsfield's treeshrew, and the variations of these papillae are very dependent on the pattern, type of food and the function of the tongue.
豪氏树鼩（Tupaia javanica）是爪哇岛上发现的一种鼩鼱，主要以果实为食，偶尔也吃昆虫。这种鼩鼱在生态系统中起着重要的作用，它传播植物种子并控制昆虫。迄今为止，关于豪氏树鼩舌头的结构还没有相关知识。因此，本研究旨在通过两种不同的方法提供豪氏树鼩舌头结构的数据。我们通过 1）扫描电子显微镜（SEM）观察微观结构和 2）组织学观察微观组织来研究豪氏树鼩的舌形态和舌乳头分布。我们的宏观研究结果表明，豪氏树鼩的舌头可分为三部分：舌尖、舌体和舌根。舌体的背侧中部是延伸至舌根的正中沟。SEM 和光镜观察显示，舌尖有三种乳头：鳞片状丝状乳头、小型丝状乳头和菌状乳头。这些乳头在舌体上呈玫瑰花形丝状乳头、矢车菊形丝状乳头、圆锥形乳头和菌状乳头。同时，舌根含有小型丝状乳头、鳞片状丝状乳头、轮廓乳头、圆锥形乳头和菌状乳头。在后外侧舌根上，Weber 腺对 PAS 反应呈阳性。总的来说，我们的研究表明豪氏树鼩舌面的乳头存在变化，这些乳头的变化非常依赖于食物的模式、类型和舌头的功能。
