4.6 Article

Taxonomy and Molecular Phylogeny of Two New Species of Prostomatean Ciliates With Establishment of Foissnerophrys gen. n. (Alveolata, Ciliophora)

Journal

FRONTIERS IN MICROBIOLOGY
Volume 12, Issue -, Pages -

Publisher

FRONTIERS MEDIA SA
DOI: 10.3389/fmicb.2021.686929

Keywords

biodiversity; ciliated protozoa; intracellular prokaryote; molecular systematics; new taxa; SSU rRNA gene

Categories

Funding

  1. National Natural Science Foundation of China [41976086, 41776133, RSP-2021/7]
  2. King Saud University, Riyadh, Saudi Arabia

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Prostomatean ciliates, important players in aquatic microbial food webs, are poorly understood due to limited taxonomically informative morphological characters. Two new species, Lagynus binucleatus sp. n. and Foissnerophrys alveolata gen. n., sp. n., collected from Qingdao, China, are investigated, with the establishment of a new genus, Foissnerophrys gen. n., based on morphological and molecular data.
Prostomatean ciliates play important roles in the flow of material and energy in aquatic microbial food webs, and thus have attracted wide attention for over a century. Their taxonomy and systematics are, however, still poorly understood because of their relatively few taxonomically informative morphological characters. In this study, two new prostomateans, Lagynus binucleatus sp. n. and Foissnerophrys alveolata gen. n., sp. n., collected from a freshwater pool and the intertidal zone of a sandy beach, respectively, in Qingdao, China, are investigated using living observation, protargol staining, and SSU rRNA gene sequencing methods. The genus Lagynus is redefined, and the new species L. binucleatus sp. n. is established based on significant morphological differences with similar forms. Furthermore, a new genus, Foissnerophrys gen. n., is established based on a combination of morphological and molecular data with F. alveaolata sp. n. the type species by monotypy. The identities of intracellular prokaryotes of these two new species are discussed based on fluorescence in situ hybridization (FISH) data and newly obtained 16S rRNA gene sequences.

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