Ultrastructural comparison between the tongue of two reptilian species endemic in Egyptian fauna; Bosc's fringe-toed lizard Acanthodactylus boskianus and Sinai fan-fingered gecko Ptyodactylus guttatus,Microscopy Research and Technique

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Ultrastructural comparison between the tongue of two reptilian species endemic in Egyptian fauna; Bosc's fringe-toed lizard Acanthodactylus boskianus and Sinai fan-fingered gecko Ptyodactylus guttatus
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2021-03-15 , DOI: 10.1002/jemt.23753
Doaa I Gewily ₁ , Fatma A Mahmoud ₂ , Samy A Saber ₃ , Boshra A ElSalkh ₁ , Asmaa A El-Dahshan ₁ , Mohamed M A Abumandour ₄ , Ramadan M Kandyel ₅ , Ali G Gadel-Rab ₆

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The current observations focused on the ultrastructure comparison between the tongue of two reptile species endemic the Egyptian fauna; Bosc's fringe-toed lizard Acanthodactylus boskianus and Sinai fan-fingered gecko Ptyodactylus guttatus to exhibit the relationship between the lingual epithelium and its function according to their specific feeding strategy. A. boskianus possessed triangular elongated tongue with bifurcated tapering apex and wide base while; the P. guttatus had a triangular flattened tongue with conical shallow bifurcated apex and broad base. The ventral surface of the lingual apex of A. boskianus had transverse while in P. guttatus had two oval pads and median ventral groove. Both surfaces of the tongue of both examined species are covered by stratified squamous epithelium with great variability of degree of keratinization. The dorsal epithelium formed flattened and conical filiform papillae in A. boskianus, while in P. guttatus formed cylindrical papillae, conical, and tall filiform ones. Few taste buds are observed on the fore-tongue but increase on the mid-tongue of A. boskianus, while in P. guttatus, numerous taste buds are distributed on the fore-tongue and mid-tongue. Both surfaces of the laryngeal mound of both examined species provided with numerous of cilia and orifices of laryngeal gland. The present results confirmed that the tongue of A. boskianus acts as a chemoreceptor organ to follow pheromone trails of prey and mates. While in P. guttatus the tongue may play an important role in the feeding mechanism and act as a chemoreceptor organ.

中文翻译：

埃及动物群中两种特有爬行动物舌头的超微结构比较；Bosc 的流苏蜥蜴 Acanthodactylus boskianus 和西奈扇指壁虎 Ptyodactylus guttatus

目前的观察集中在埃及动物群特有的两种爬行动物物种的舌头之间的超微结构比较；Bosc 的条纹趾蜥蜴Acanthodactylus boskianus和西奈扇指壁虎Ptyodactylus guttatus根据其特定的摄食策略展示舌上皮及其功能之间的关系。A. boskianus舌呈三角形细长，舌尖分叉，尖尖，基部宽；的P.鱯具有三角形扁平舌带有锥形浅分叉顶点和广泛的基础。A. boskianus 舌尖的腹面在P. guttatus 中具有横向有两个椭圆形垫和正中腹沟。两个被检查物种的舌头的两个表面都被分层的鳞状上皮覆盖，角化程度差异很大。A. boskianus 的背上皮形成扁平和锥形的丝状乳头，而P. guttatus形成圆柱形、锥形和高丝状乳头。A. boskianus的前舌味蕾很少，而中舌味蕾增多，而P. guttatus的前舌和中舌上分布着大量的味蕾。两个受检物种的喉丘的两个表面都有许多纤毛和喉腺孔。目前的结果证实，舌A. boskianus充当化学感受器器官，跟踪猎物和配偶的信息素踪迹。而在P. guttatus 中，舌头可能在喂养机制中发挥重要作用并充当化学感受器器官。

更新日期：2021-03-15

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