Fonseca Clarisse Maria Barbosa, da Silva Andrezza Braga Soares, Cavalcante Maria Michele Araújo de Sousa, de Oliveira Ingrid Macedo, Moura Selma Maria Santos, Cunha Bruno Melo, Leite Carla Maria de Carvalho, de Carvalho Maria Acelina Martins, Moura Waldilleny Ribeiro de Araújo, Rizzo Márcia Dos Santos, Conde Júnior Airton Mendes
Department of Morphology, Health Sciences Center, Federal University of Piaui, Minister Petrônio Portela Campus, CEP: 64059-550, Teresina, Piauí, Brazil.
Department of Veterinary Morphology, Center of Agrarian Sciences, Federal University of Piaui, Minister Petrônio Portela Campus, CEP: 64059-550, Teresina, Piauí, Brazil.
Microsc Res Tech. 2017 Oct;80(10):1089-1095. doi: 10.1002/jemt.22904. Epub 2017 Jun 27.
Armadillos, Xenarthras representatives, known for adaptability to different ecosystems, own specific morphophysiological characteristics that are not known and deserve to be studied. The aim of this study was to describe the morphology of cartilage of the larynx of the nine-banded armadillo (Dasypus novemcinctus). Five dead armadillos were donated by the Chico Mendes Institute of Biodiversity (ICMBio-PI) to the Federal University of Piauí. The animals were fixed and dissected for removal of the larynx. The cartilages were identified and described, photodocumented, and schematized. Fragments with about 0.5 cm of each cartilage were collected and submitted to classical histology for Hematoxylin-Eosin coloring. The slides were assembled in enterlan and analyzed under a light microscope. The larynx of the armadillo (D. novemcinctus) is located in the mentonian region, ventral to the esophagus, and due to the total positioning of the tongue in the oral cavity, there is also a cranial cervical position in this species. The larynx has five cartilages, they are: a cricoid, a thyroid, an epiglottis, and two arytenoids. The corniculate process is present; however, the cuneiform process is absent. The epiglottis has a discrete bifurcation at its apex. In all cartilages epithelial variations are observed. The tissues are varied from squamoso stratified to cylindrical pseudostratified, with propria lamina rich in mucoserosas glands. With the exception of epiglottic cartilage, predominantly elastic, the rest are hyaline. The larynx of D. novemcinctus, although the same number of cartilages, differs morphologically and microscopically from the larynx of other species.
犰狳是异关节总目动物的代表，以适应不同生态系统而闻名，具有一些未知且值得研究的特定形态生理特征。本研究的目的是描述九带犰狳（Dasypus novemcinctus）喉部软骨的形态。五只死亡的犰狳由奇科·门德斯生物多样性研究所（ICMBio-PI）捐赠给皮奥伊联邦大学。这些动物被固定并解剖以取出喉部。对软骨进行识别、描述、拍照记录并绘制示意图。从每个软骨上收集约0.5厘米的碎片，进行苏木精-伊红染色的经典组织学处理。将玻片组装在载玻片架上，在光学显微镜下进行分析。犰狳（D. novemcinctus）的喉部位于颏部区域，食管腹侧，由于舌头完全位于口腔内，该物种的喉部在颈椎前方也有一个位置。喉部有五块软骨，它们是：一块环状软骨、一块甲状软骨、一块会厌软骨和两块杓状软骨。有小角状突；然而，楔状突不存在。会厌在其顶端有一个离散的分叉。在所有软骨中均观察到上皮变化。组织从复层鳞状到柱状假复层不等，固有层富含黏液浆液腺。除了主要为弹性软骨的会厌软骨外，其余均为透明软骨。九带犰狳的喉部虽然软骨数量相同，但在形态和微观结构上与其他物种的喉部不同。
