Foregut microspines in four families of cockroaches (Blattaria) |
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| Institution: | 1. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China;2. Shanghai Nanotechnology Promotion Center, Shanghai 200237, People’s Republic of China;1. Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS, Akademgorodok 50/50, 660036 Krasnoyarsk, Russia;2. Siberian Federal University, Svobodny pr. 79, 660041 Krasnoyarsk, Russia;3. State Medical University named after V.F. Voyno-Yasenetsky, Partizana Zheleznyaka St. 1, 660022 Krasnoyarsk, Russia |
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| Abstract: | The microspines of the cockroach foregut were investigated in order to determine their fine structure, variation, patterns of distribution, and possible functions. The following were studied: Blaberidae (4 species), Blatellidae (3 species), Blattidae (2 species), and Cryptocercidae (one species). Elongate microspines (over 30 μm), usually several attached to a basal plate, were found in the buccal cavity and anterior and posterior pharynx of blaberids and blattids, whereas moderate (15–20 μm) to short (1–5 μm) microospines were found in 2 regions in the blattellid and cryptocercid cockroaches. Short microspines (1–5 gmm) individually attached to a basal plate occurred in the esophagus, crop, proventriculus and stomodeal valve regions in all families studied. Microspines appear to be useful in understanding systematics and evolution of cockroaches. The possible role of elongate microspines in retaining food particles during regurgitation behavior is postulated. |
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