Mucous droplets with multiple membranes in the accessory submandibular glands of long-winged bats

The Anatomical Record
B TandlerC A Pinkstaff


Certain species of bats possess two sets of submandibular glands, namely, principal and accessory. The ultrastructure and histochemistry of the accessory submandibular gland was examined in three species of long-winged bats. Specimens of Miniopterus schreibersi and M. magnator were live-trapped in Thailand, and of M. inflatus were live-trapped in Kenya. For electron microscopy, accessory submandibular lands were initially fixed in triple aldehyde-DMSO, postfixed in osmium tetroxide, and embedded in Epon-Maraglas. A portion of the glands collected in Thailand (M. schreibersi and M. magnator) was fixed in buffered formalin and embedded in paraffin. Sections of the latter material were subjected to a battery of histochemical tests for glycoconjugates. Although in all three species the accessory submandibular glands have normal histological structure, the glands in two, M. schreibersi and M. magnator, were distinguished by possessing mucous droplets of unusual morphology. These droplets, whose identity as mucous was confirmed by histochemical tests for glygoconjugates, are delimited by manifold membranes: up to 10 in M. schreibersi and fewer, but still multiple, in M. magnator. In both species, the entire array of surface membranes...Continue Reading


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