Pediglissa

{{Short description|Subclass of protists}}

{{Automatic taxobox|taxon=Pediglissa|authority=Cavalier-Smith, 2018|subdivision_ranks=Orders|subdivision=

}}

Pediglissa ({{etymology|grc|πέδον|soil||||fr|glisser|to glide}}) is a subclass of phagotrophic protists that inhabit soil or freshwater habitats. They were defined in 2018 according to phylogenetic analyses that showed a clade containing the orders Cercomonadida and Glissomonadida. They're the sister group of Paracercomonadida.

Morphology and behavior

Pediglissa are biciliate protists that glide on their posterior cilium and have a strong tendency to become amoeboid during feeding, unlike the metromonads. Their pseudopodia are more often shaped like rounded lamellae than finger-like or filose pseudopodia, unlike the paracercomonads. Their anterior cilium is often well developed, unlike in helkesids, but can be short in glissomonads; it moves with an undulating oar-like beat. The trophic cells (i.e. feeding forms) are naked, without a theca, scales, or perles, unlike in Thecofilosea and many freshwater Imbricatea.

Diversity

Pediglissa includes the majority of known cercozoan soil flagellates, all gliding on a single posterior cilium only: the largely bacterivorous Cercomonadida, and the Glissomonadida which include pansomonads and the algivorous Viridiraptoridae of recent description.

References

{{Reflist|refs=

{{cite journal|title=Multigene phylogeny and cell evolution of chromist infrakingdom Rhizaria: contrasting cell organisation of sister phyla Cercozoa and Retaria|first1=Thomas|last1=Cavalier-Smith|first2=Ema E.|last2=Chao|first3=Rhodri|last3=Lewis|date=April 2018|journal=Protoplasma|volume=255|issue=5 |pages=1517–1574|doi=10.1007/s00709-018-1241-1|pmid=29666938|pmc=6133090}}

{{cite journal|vauthors=Howe AT, Bass D, Vickerman K, Chao EE, Cavalier-Smith T|title=Phylogeny, Taxonomy, and Astounding Genetic Diversity of Glissomonadida ord. nov., The Dominant Gliding Zooflagellates in Soil (Protozoa: Cercozoa)|journal=Protist|volume=160|issue=2|date=2009|pages=159–189|issn=1434-4610|doi=10.1016/j.protis.2008.11.007}}

{{cite journal|vauthors=Hess S, Melkonian M|title=The Mystery of Clade X: Orciraptor gen. nov. and Viridiraptor gen. nov. are Highly Specialised, Algivorous Amoeboflagellates (Glissomonadida, Cercozoa)|journal=Protist|volume=164|issue=5|date=2013|pages=706–747|issn=1434-4610|doi=10.1016/j.protis.2013.07.003}}

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{{taxonbar|from=Q116858632}}

Category:Rhizaria taxa

Category:Taxa described in 2018