Morrison C M, Martell D J, Leggiadro C, O'Neil D
Department of Fisheries and Oceans, Halifax Laboratory, N.S., Canada.
Folia Parasitol (Praha). 1996;43(1):20-36.
Trophozoites of Ceratomyxa drepanopsettae Averintsev, 1907 (Myxosporea: Ceratomyxidae) containing prominent refractile granules were found in the gallbladders of all but one of eight halibut, the exception being a single juvenile. They ranged in shape and size from globular forms 5-10 micron in diameter, to rounded structures with pseudopodia and one or more processes that were up to 500 micron in length and packed with refractile granules. Some trophozoites were free in the bile, while others were attached to the epithelium of the gallbladder wall by pseudopodia which extended between the microvilli. Many free trophozoites were attached to each other by septate junctions between their pseudopodia. There were small cylindrical papillae on the surface of the trophozoites, and the rounded portions contained two vegetative nuclei, generative cells (some attached by junctions) and, in many cases, feeding vacuoles. During sporogony, a binucleate sporoplasmic cell and the capsulogenic cells of some sporoblasts were engulfed by valvogenic cells before they began to differentiate; whereas other sporoblasts consisted of six cells attached to each other, two being capsulogenic cells containing external tubes, two sporoplasmic cells and two valvogenic cells. There was a septate junction around the opening of the rounded polar capsule of the spore, between the capsulogenic and valvogenic cell. Sporoplasmosomes appeared to form in smooth membraned vesicles, possibly part of the Golgi apparatus. Spores had thin, delicate membrane, and elongate shell-valves, most of which were asymmetric, and bent or folded. A sporoplasm extended on either side of the distinct, straight suture line, but did not penetrate into the valves.
1907年发现的德氏角孢子虫（Ceratomyxa drepanopsettae Averintsev）（粘孢子虫纲：角孢子虫科）滋养体含有突出的折光颗粒，在8条大比目鱼中，除1条幼鱼外，其余7条的胆囊中均有发现。它们的形状和大小各异，从直径5 - 10微米的球形，到带有伪足和一个或多个长达500微米且充满折光颗粒的突起的圆形结构。一些滋养体游离于胆汁中，另一些则通过延伸至微绒毛之间的伪足附着在胆囊壁上皮。许多游离的滋养体通过其伪足之间的分隔连接相互附着。滋养体表面有小的圆柱形乳头，圆形部分包含两个营养核、生殖细胞（有些通过连接附着），并且在许多情况下还有食物泡。在孢子形成过程中，双核孢子质细胞和一些孢子母细胞的包囊生成细胞在开始分化之前被瓣膜生成细胞吞噬；而其他孢子母细胞由六个相互连接的细胞组成，两个是含有外部管的包囊生成细胞，两个是孢子质细胞，两个是瓣膜生成细胞。在包囊生成细胞和瓣膜生成细胞之间，孢子圆形极囊开口周围有一个分隔连接。孢子质体似乎在光滑膜泡中形成，可能是高尔基体的一部分。孢子具有薄而精致的膜和细长的壳瓣，其中大多数不对称，弯曲或折叠。孢子质在明显的直缝线两侧延伸，但不穿透瓣膜。
