Marine parasites of the genus Parvilucifera have been described as endoparasitoids of dinoflagellates. Recently, the species Parvilucifera corolla was described, but its host range was not examined. Here, the host selectivity of P. corolla was screened, including 110 strains of dinoflagellates (24 genera) and other microalgal groups as potential hosts. Infections and the full life cycle of the parasitoid were observed in 73 strains (16 genera) of dinoflagellates. Parvilucifera corolla did not infect most chlorophytes, cryptophytes, chrysophytes, diatoms, haptophytes and raphidophytes but one strain of Pyramimonas (chlorophyte) was infected, although without viable sporangia. In Symbiodinium natans, a transition to the coccoid stage was induced above a certain parasite:host ratio. These results confirm P. corolla as a generalist parasitoid of dinoflagellates, with important differences in host range regarding other species of the genus.

Parvilucifera属的海洋寄生虫已被描述为鞭毛藻的内寄生虫。最近，描述了Parvilucifera花冠物种，但未检查其寄主范围。在这里，对花冠假单胞菌的宿主选择性进行了筛选，其中包括110株鞭毛鞭毛藻（24属）和其他微藻类作为潜在宿主。在73株（16属）鞭毛鞭毛虫中观察到了寄生虫的感染和整个生命周期。尽管没有活孢子囊，但小花冠病菌并没有感染大多数叶绿体，隐生植物，金绿藻，硅藻，触藻和斜生植物，但感染了一株Pyramimonas（叶绿素）。在在一定的寄生虫：宿主比以上，诱导了共生植物natans，向球状阶段的过渡。这些结果证实了花冠假单胞菌是鞭毛鞭毛虫的通体寄生物，在寄主范围方面与该属的其他物种有重要差异。