Opercularia articulata has been recorded as both free-living as a symbiont. The aim of this contribution is to present some geographical distribution, cytological, ecological, and symbiotic data from this ciliate, as a symbiont of crayfish. Procambarus (Austrocambarus) sp. were collected from Lagos de Montebello, Chiapas during two climatic seasons through a year. Some physico chemical data were obtained in order to infer if any relationship of the ciliates presence with the properties of the water is present. We found 150 zooids (cells) as epibionts on 95% of the crayfish, finding a seasonal variation regarding the ciliate density. Ciliates belong to genus Opercularia that are characterized by inhabiting low-quality water environments, considering them as biological indicators. As for geographical distribution, the European continent showed the highest number of records, while for Australia and Africa there are no records.

关节小art已被记录为自由生活的共生体。该贡献的目的是提供该纤毛虫作为小龙虾的共生体的一些地理分布，细胞学，生态学和共生数据。Procambarus（Austrocambarus） sp。在一年中的两个气候季节，它们都是从恰帕斯州的拉各斯·德·蒙特贝洛收集的。为了推断纤毛虫的存在与水的性质是否存在任何关系，获得了一些理化数据。我们在95％的小龙虾上发现了150个类动物（细胞）作为表皮动物，发现了纤毛密度的季节性变化。纤毛虫属于眼球菌属以居住在劣质水环境中为特征的生物，将其视为生物指标。至于地理分布，欧洲大陆的记录数量最多，而澳大利亚和非洲则没有记录。