| Plagiopylida | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Clade: | SAR |
| Clade: | Alveolata |
| Phylum: | Ciliophora |
| Subphylum: | Intramacronucleata |
| Class: | Plagiopylea Small & Lynn, 1985 |
| Order: | Plagiopylida Jankowski, 1978[1] |
| Typical families | |
The plagiopylids are a small order of ciliates, including a few forms common in anaerobic habitats.
The body cilia are dense, and arise from monokinetids with an entirely unique ultrastructure; one or two rows of dikinetids run into the oral cavity, which takes the form of a groove, with a deep tube lined by oral cilia leading to the mouth. The order was introduced by Eugen Small and Denis Lynn in 1985, who treated it as a subclass of Oligohymenophorea. Since then they tend to be treated as an independent class, possibly affiliated with the Colpodea. Class Plagiopylea is divided into two clades:[2] one contains members of the order Plagiopylida (like Plagiopyla frontata and Trimyema compressum) and the second clade contains plagiopylean ciliate associated with denitrifying obligate endosymbiont Candidatus Azoamicus ciliaticola.[3]
- ^ Lynn DH (2008-06-24). The Ciliated Protozoa: Characterization, Classification, and Guide to the Literature (3rd ed.). Springer. p. 409. ISBN 978-1-4020-8239-9.
- ^ Boscaro V, Santoferrara LF, Zhang Q, Gentekaki E, Syberg-Olsen MJ, Del Campo J, Keeling PJ (June 2018). "EukRef-Ciliophora: a manually curated, phylogeny-based database of small subunit rRNA gene sequences of ciliates". Environmental Microbiology. 20 (6): 2218–2230. doi:10.1111/1462-2920.14264. PMID 29727060. S2CID 19135660.
- ^ Graf JS, Schorn S, Kitzinger K, Ahmerkamp S, Woehle C, Huettel B, et al. (March 2021). "Anaerobic endosymbiont generates energy for ciliate host by denitrification". Nature. 591 (7850): 445–450. Bibcode:2021Natur.591..445G. doi:10.1038/s41586-021-03297-6. PMC 7969357. PMID 33658719.