Miracula einbuarlaekurica sp. nov., a new holocarpic endoparasitoid species from pennate freshwater diatoms in Iceland.

Holocarpic oomycetes infecting freshwater diatoms are obligate endobiotic parasites reported from a wide range of habitats. So far, the taxonomy of and phylogeny of most species remains unresolved, since most have not been reported throughout the past decades and sequence data are available for only the four species, , and the recently-discovered species . In the current study, a new freshwater diatom parasite resembling in the sense of Scherffel was discovered from pennate diatoms () collected from the small stream Einbúalækur on Víkurskarð, North Iceland and investigated for its life cycle and phylogenetic placement.

A New Marine Species of () Parasitic to sp. in Iceland.

Obligate endoparasitic oomycetes are known to ubiquitously occur in marine and freshwater diatoms, but their diversity is still largely unexplored. Many of these parasitoids are members of the early-diverging oomycete lineages (, ), others are within the of the (, ) and some have been described in the (, ). Even though some species have been recently described and two new genera were introduced ( and ), the phylogeny and taxonomy of most of these organisms remain unresolved.