疣蝗和黑条小车蝗的寄生虫一新种——疣蝗微粒子虫(微孢子门:微粒子科)

NOTE ON NOSEMA TRILOPHIDIAE SP.NOV.,A PARASITE OF TRILOPHIDIA ANNULATA THUNBERG AND OEDALEUS DECORUS(GERM.) (MICROSPORA:NOSEMATIDAE)

本文报道寄生于疣蝗和黑条小车蝗的一种微粒子虫的光镜和电镜形态特征及寄生习性,定为新种。

This paper reports a new species of microsporidia collected from Beijing and Wulumuqi,China. Nosema trilophidiae sp. nov. (pl. I,figs. 1--13) Host and Site (Natural) Trilophidia annulata Thunberg (Type host) and Oedaleusdecorus(Germ.),infection in midgut, gastric caeca, salivary glands, gonods, hemolymph, fatbody, nervous tissue, tracheae and Malpighian tubules. The infected salivary glands appearhypertrophid and milky; (Experimental) Locusta migratoria manilensis (Meyen). Life cycle Meronts typically with 1--8 nuclei (in diplokaryon), sporont with twodiplokarya divided into two sporoblasts which directly transform into spores. (figs. 1--9, 11) Spore Fresh spores elongate, 3. 66±0. 34×1. 62±0. 07μm (n=50),length/breadth ra-tio 2. 44±0. 08(fig. 10). Polar filament usually 8 coils arranged in two layers in the posteriorhalf of the spore. The angle of tilt of the anterior filamentod coil 30° to the long axis of spore(figs. 12--13) Discussion The new species with diplokaryotic development stages and disporoblasticsporogony is characteristic for the genus Nosema. Hitherto only three Nosema species havebeen described from Acrididae: Nosema locustae described by E. U. Canning (1953), N.acridophagus and N. cuneatum both described by J. E. Herry (1967,1971),N. trilophidiae dif-fers from them by having distinctly smaller size and elongate shape of spores. The ultrastruc-tural characters also indicate that the species is new to science. Type locality Malianwa (40. 0°N,116. 2°E),Beijing. Sept.,1988 Deposition of type Slides with type specimens are deposited in the Institute of PlantProtection, Chinese Academy of Agricultural Sciences, Beijing.