浙江鱼类寄生粘孢子虫一新种（粘孢子虫纲：双壳目）

A New Species of Myxosporidia from Fishes in Zhejiang Province(Myxosporea: Bivalvulida)

浙江省养殖鲫鱼──东北银鲫和异育银鲫上发现一种粘孢子虫，经鉴定应属粘体虫科，命名为多态粘体虫，新种．

This paper deals with one new species of Myxosporea from allogynogenetic craciuncarp and carassius auratus gibelio (Blach) in Zhejiang province. Measurements are in microns. Measurements base on 40 speciments.Type speciments are deposited in the College of Life Science,Hangzhou Universty. The new species are described as follows:Myxosoma polymorphosporus sp. nov. (figure 1)Host:Carassius auratus gibelio (Bloch)allogynogenetic craciun carp Location: skin、fins、 gill、 kidney、 spleen、 urinary bladder、swim-bladder、genital gland、intestines、heart.Locality:Hangzhou and Tiantai,Zhejiang.Cyst:spherical,milk-white in color, 500-5500 in diameter.Trophozoites:rounded in form,about 12 in diameter,active motion like amoebula.spore:numbers of the polar capsule sometimes are variable from one to six,but the overwhelming majority of spores possess two polar capsules in a cyte. spore round or elliptical in shell view,oval in sutural view and end view,sutural ridge thick and straight,two pyriform of oval polar capsules in equal size,without iodophilic vacuole in sporoplasm. Dimensions of spores:Length 8. 62 (7. 45 - 10. 25 ),width 7. 79(6. 50-9. 50),thickness 5. 57(5. 50 - 6. 25).This new species is somewhat similar to Myxosoma cerebralis Hofer, 1903,.but differs from the latter in: (1) The Posterior end of the spore is round .while the spores of the latter always with 2-4“v”-shaped folds, (2) Numbers of polar capsules are variable from one to six,but the latter always possesses two polar capsules.