Saldarriaga J F, Storch V
Zoologisches Institut der Universität Heidelberg, Germany.
Parasitol Res. 1997;83(3):233-40. doi: 10.1007/s004360050239.
Four relatively uncommon members of the family Priapulidae (Priapulida) from very different parts of the world were examined to determine the presence of a parasitic coccidian in their midgut. The parasite was found in three of those priapulid species, Priapulopsis bicaudatus, P. australis, and Halicryptus higginsi, but not in the fourth one, Priapulus tuberculatospinosus. Using electron-microscopy techniques, we compared parasites of the different species with one another and with a parasite of Priapulus caudatus investigated by McLean in 1984. All of these parasites apparently belong to the same species and are likely to be Alveocystis intestinalis, a coccidian first described by Beltenev from P. caudatus and H. spinulosus. The present work greatly expands the geographical range of Alveocystis intestinalis and documents an uncommon case of low host specificity in eimeriid coccidians.
对来自世界不同地区的四个相对罕见的鳃曳虫科（鳃曳动物门）成员进行了检查，以确定它们中肠内是否存在寄生性球虫。在其中三种鳃曳虫物种中发现了这种寄生虫，即双尾鳃曳虫、南方鳃曳虫和希氏隐鳃曳虫，但在第四种物种多刺瘤吻鳃曳虫中未发现。利用电子显微镜技术，我们将不同物种的寄生虫相互进行了比较，并与1984年麦克莱恩研究的尾鳃曳虫的一种寄生虫进行了比较。所有这些寄生虫显然属于同一物种，很可能是肠道肺泡孢虫，这是一种首次由贝尔捷涅夫从尾鳃曳虫和小刺隐鳃曳虫中描述的球虫。目前的研究极大地扩展了肠道肺泡孢虫的地理分布范围，并记录了艾美耳科球虫中罕见的低宿主特异性案例。
