Comparative Intestinal Histomorphology of Five Species of Phyllostomid Bats (Phyllostomidae, Microchiroptera): Ecomorphological Relations with Alimentary Habits
International Journal of Morphology
GADELHA-ALVES, R.; ROZENSZTRANCH, A. M. S. & ROCHA-BARBOSA, O. Comparative intestinal histomorphology of five species of Phyllostomid Bats (Phyllostomidae, Microchiroptera): ecomorphological relations with alimentary habits. Int. J. Morphol., 26(3):591-602, 2008. SUMMARY: The intestines of Sturnira lilium, Phyllostomus hastatus, Carollia perspicillata, Glossophaga soricina and Desmodus rotundus were analized through macroscopic, morphometric and light microscopy studies. The species studied
... species studied presented some common characteristics generally found in bats, such as the absence of a caecum and an appendix. The frugivorous bat S. lilium has a longer intestine than the other species. The intestinal epithelium is of the simple columnar type, constituted of absorptive cells characterized by microvilli and goblet cells, which in all the species proved to be PAS + and AB +. These cells presented some differences in quantity and in distribution among the species. The intestinal mucosa presented morphologic and morphometric differences, such as the shape and size of villi as well as the length of the crypts of Lieberkühn. Histologically the different intestinal portions could be distinguished: in the middle portion we found few goblet cells and long villi; in the distal portion we found an increase in goblet cells and a decrease in villi height; and in the large intestine no villi were found, but rather abundant intestinal glands with numerous goblet cells. In C. perspicillata, P. hastatus and G. soricina we could observe Peyer's patches in the distal portion near the large intestine, whereas in D. rotundus and S. lilium we found aggregations of lymphoid nodulous tissue distributed along the tube. In all species we observed the presence of Paneth cells at the base of the crypts of Lieberkühn. We could observe differences among the species in the distribution of collagen in the small intestine submucosa and serosa. The outer muscular layer has one circular layer and a longitudinal layer, the circular layer increasing in thickness along the tube. Large intestine characteristics are uniform among the species. Structures such as the taenia coli and the appendices epiploicae were absent. These results should contribute not only to improve understanding of bat morphology, but also to provide grounds for the evaluation of evolutionary models on the adaptive radiation of phyllostomid feeding habits. Part of a M.Sc. dissertation (Rafaela Gadelha-Alves). GADELHA-ALVES, R.; ROZENSZTRANCH, A. M. S. & ROCHA-BARBOSA, O. Comparative intestinal histomorphology of five species of Phyllostomid Bats (Phyllostomidae, Microchiroptera): ecomorphological relations with alimentary habits. Int. J. Morphol., 26(3):591-602, 2008. List of specimens used. · Phyllostomus hastatus (Subfamily Phyllostominae): MN 56210, MN 56233, MN 56234, MN 56235, MN 56236, MN 56238, MN 59715, MN 59835. · Carollia perspicillata (Subfamily Carolliinae): MN 56262, MN 56289, MN 56292, MN 56293, MN 56324, MN 56352, MN 59694, MN 59696, MN 59721, MN 59732, MN 59739, MN 59803, MN 59810. · Desmodus rotundus (Subfamily Desmodontinae): MN 56164, MN 56190, MN 59710, MN 59711; MN 59724 , MN59743, MN 59766, MN 59778; MN 59823; MN 59830. · Sturnira lilium (Subfamily Stenoderminae): MN 56186, MN 56194, MN 56342, MN 56344, MN 56345, MN 59697, MN 59716, MN 59749, MN 59750, MN 59755, MN 59761, MN 59817. · Glossophaga soricina (Subfamily Glossophaginae): MN 56156, MN 56157, MN 56278, MN 56278, MN 56302, MN 56308, MN 56309, MN 56310, MN 56333, MN 56335, MN 59758.