The phylum Perkinsozoa is known as an exclusively parasitic group including the parasites of shellfish, fish, dinoflagellates, cryptophytes, and tadpoles and at present comprises seven genera across three families (Parviluciferaceae, Perkinsidae, and Xcellidae), with the genus Parvilucifera having the most abundant species in the family Parviluciferaceae. During intensive sampling along the Korean coast in August and September 2017, a new species of the genus Parvilucifera was discovered and successfully established in cultures. Morphological and ultrastructural observations revealed that the new parasitoid shares almost all known diagnostic characters with other species of Parvilucifera, except that its sporangium has a higher number of apertures although with smaller diameters than those in P. infectans. Molecular phylogenetic trees based on both nuclear small subunit (SSU) and concatenated SSU and large subunit (LSU) ribosomal DNA (rDNA) sequences revealed that the new parasitoid was nested within the family Parviluciferaceae and had a sister relationship with P. infectans. Based on morphological, ultrastructural, and molecular data, we propose to erect a new species, P. multicavata sp. nov., for the new parasitoid found in this study.

Perkinsozoa门是一个唯一的寄生虫群，包括贝类，鱼，鞭毛虫，隐藻和t的寄生虫，目前由三个科（Parviluciferaceae，Perkinsidae和Xcellidae）的七个属组成，其中Parvilucifera属含量最高。在Parviluciferaceae科。在2017年8月和9月沿韩国海岸进行的密集采样中，发现了一种新的Parvilucifera属物种，并在文化中成功建立了这种物种。形态学和超微结构观察表明，新的寄生虫与其他种类的Parvilucifera具有几乎所有已知的诊断特征除了它的孢子囊有更多的孔，尽管直径比P小。感染者。基于核小亚基（SSU）以及级联SSU和大亚基（LSU）核糖体DNA（rDNA）序列的分子系统树显示，新的寄生虫嵌套在Parviluciferaceae科中，并且与P具有姐妹关系。感染者。基于形态，超微结构和分子数据，我们建议竖立一个新的物种，P。Multicavata sp。十一月，针对这项研究中发现的新寄生虫。