Morphological Features of the Stomach of Malayan Pangolin, Manis javanica

Abstract

The morphology of the stomach of Malayan pangolin, Manis javanica was studied at macroscopic, light microscopic, and scanning electron microscopic levels. The stomach of M. javanica was C-shaped with short lesser curvature. At the oesophageal junction, the inner smooth muscle was thickened in the greater curvature side. The entire stomach was lined by a thick cornified stratified squamous epithelium, except at the duct orifices of glands and in the pyloric gland region. The wall of the fundus was thin and devoid of glands. The gastric glands consisted of mucous, oxyntic, and pyloric glands. The mucous glands were observed in the lesser curvature (Mg-L), in the greater curvature (Mg-G), and in the pyloric canal (Mg-C) respectively. The oxyntic glands were organized into gland mass, making an oval mound elevated to the gastric lumen, in the middle of the greater curvature. The oxyntic gland mass has a single common duct with opening directed to the pyloric side. This duct was surrounded by mucus gland (Mg-G). The pyloric glands were located caudal to the pylorus. There was no sphincter at the pyloric-duodenal junction. Large mucosal protuberance, the torus pyloricus was observed in the side of the lesser curvature of the pyloric canal. In the lumen of pyloric canal region, numerous spines and small pebbles were observed. The muscle layers in the wall of this region were considerably thickened. The present results on the stomach of M. javanica are thought to be closely related to the toothless and eating habits of this animal species.

Light and Electron Microscopy of the European Beaver (Castor fiber) Stomach Reveal Unique Morphological Features with Possible General Biological Significance

“…To our knowledge, a CGG has been reported in twelve other mammalian species: the wombat [6], koala [7], dusky and northern shrew opossums [8], pangolins [9], [10], grasshopper mouse [11], dugong [12], and all species of manatees [13]. Animals possessing a CGG are herbivores with the exception of the grasshopper mouse and pangolin, which are insectivores.…”

“…The location and macroscopic structure of the CGG have significant interspecies differences [6], [7], [8], [9], [10], [11], [12], [13]. In the koala, wombat, dusky and northern shrew opossums, the CGG is present along the lesser curvature, directly behind the esophageal entrance.…”

“…The general histological organization of the CGG is similar across all species [4], [6], [7], [8], [9], [10], [13]. The gland is formed by sac-like invaginations of the mucosa into the submucosa, which are usually branched.…”

Anatomi Organ Reproduksi Jantan Trenggiling (Manis javanica)

“…Beberapa keunikan trenggiling adalah tubuh yang ditutupi sisik-sisik keras seperti reptil, tidak memiliki gigi (toothless) seperti unggas, lidah dapat menjulur panjang dan menggulung tubuh jika terancam (Breen, 2012), serta memiliki pyloric teeth di daerah pilorus lambung (Nisa' et al, 2010). Selain itu kemampuan penciuman trenggiling lebih baik dibandingkan penglihatannya (Robinson, 2005).…”

“…Empat ekor trenggiling jantan berasal dari hasil sitaan yang dihibahkan oleh Dirjen PHKA pada tahun 2013 dan sudah diawetkan dalam formalin 10%, sedangkan satu sampel organ reproduksi jantan berasal dari sampel penelitian disertasi Nisa' (2005) …”