The morphology of the intestine of the insectivorous horseshoe bat {Rhinolophus hildebrandti, Peters): a scanning electron and light microscopic study

A. N. MAKANYA, J. N. MAINA

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17 Citations (Scopus)

Abstract

The gastrointestinal tract of the horseshoe bat, Rhinolophus hildebrandti (Peters), was studied macroscopically, with the light microscope and with the scanning electron microscope. Macroscopically, the stomach was of the simple type and the intestine was a short convoluted tube with an almost uniform diameter. A caecum, an appendix and a colon were absent, and the only portion of the large intestine observed was a short rectum which had a distinctly greater diameter than the rest of the intestine. The proximal part of the intestine showed a brief ‘honeycomb’ segment preceding the ridge‐like transverse villi that occupied the rest of the foregut. In the region immediately proximal to the rectum the villi joined in a geometrical pattern to form chambers resembling ‘reticular cells’ of the ruminant stomach. The villi were covered with a prominent columnar epithelium occasionally interrupted by goblet cells. Generally, the intestine of Rhinolophus resembles that of the other bats which have been studied, but showed structural details suggestive of an increased surface area. Le tractus intestinal du Rhinolophe, Rhinolophus hildebrandti (Peters) a étéétudié au moyen d'un microscope simple et d'un microscope électronique. Macroscopiquement, l'estomac est de type simple, et l'intestin est un tube court enroulé d'un diamétre presque constant. Il n'y a ni caecum, ni appendice, ni colon, et la seule portion de gros intestin observééétait un rectum court d'un diamétre nettement plus grand que le reste de l'intestin. La partie proximate de l'intestin présente un court segment en “nid d'abeille” qui précéde le reste de l'intestin strié transversalement. Dans la partie qui précéde directement le rectum, les villosités transversales rejoignent un schéma géométrique pour former des chambres semblables aux “cellules réticulaires” de l'estomac des ruminants. Les villosités étaient couvertes d'un épithélium en colonnes trés visible, interrompu çà et lá par des cellules en gobelet. Globalement, l'intestin du Rhinolophe ressemble à celui des autres‐chauves souris qui ont déjàétéétudiées mais présente des détais de structure qui suggérent une augmentation de la surface.

Original languageEnglish
Pages (from-to)158-168
Number of pages11
JournalAfrican Journal of Ecology
Volume32
Issue number2
DOIs
Publication statusPublished - Jun 1994
Externally publishedYes

Keywords

  • Bat
  • intestine
  • light microscopy
  • scanning microscope

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

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