During faunal studies of psammophilic ciliates along the coast of Qingdao, China, several marine karyorelictean species were isolated. Among them, four species within the genus Remanella were investigated, including two species new to science: i.e., R. rugosa, Remanella elongata sp. nov., Remanella aposinica sp. nov., and R. unicorpusculata. Remanella rugosa has been reported several times, but this study is the first to provide detailed morphological characters and phylogenetics. Remanella elongata sp. nov. can be distinguished from its congeners by the presence of complex cortical granules, fewer macronuclei, and longer body size. Remanella aposinica sp. nov. differs from its congeners by having 14-17 right lateral ciliary rows and 24-37 dikinetids of intrabuccal kinety. Poorly known Remanella rugosa var. unicorpusculata (Kahl, 1933) Foissner, 1996 should be elevated from subspecies to species level, Remanella unicorpusculata (Foissner, 1996) stat. nov., based on detailed redescriptions with statistical data, living morphology, infraciliature, and species definitions. Small subunit (SSU) rDNA was sequenced for the four species, and phylogenetic analysis revealed that all known taxa in Remanella formed the outline branch to the genus Loxodes with moderate to high bootstrap support among Remanella lineages.
在对青岛潮间带的沙栖原生动物研究中，我们分离鉴定出四种核残迹纲纤毛虫，它们分别是褶皱海喙虫、长海喙虫（新种）、拟中华海喙虫（新种）和单泡海喙虫。褶皱海喙虫虽已被多次报道，但本研究首次揭示该种详细的形态学特征及系统进化地位。长海喙虫（新种）与其相近种最主要的区别在于皮层颗粒排布方式复杂，大核数量少，体型大。拟中华海喙虫（新种）与相近种最主要的区别是其具有14–17列体动基列，口内动基列由24–37对毛基粒构成。根据详细的形态学特征，本研究将亚种单泡褶皱海喙虫升级为种，即单泡海喙虫，并首次报道其详细的活体特征和纤毛图式。基于核糖体小亚基序列的系统演化关系分析揭示海喙虫与喙纤虫属形成姐妹枝, 共同构成单系发生的喙纤科。.
Keywords: Infraciliature; Marine ciliates; Morphology; Phylogeny.