Editing Euglenozoa (section)

== Structure ==
Most euglenozoa have two flagella, which are inserted parallel to one another in an apical or subapical pocket. In some these are associated with a [[cytostome]] or mouth, used to ingest [[bacteria]] or other small organisms. This is supported by one of three sets of [[microtubule]]s that arise from the flagellar bases; the other two support the dorsal and ventral surfaces of the cell.<ref name="Pat1999">{{cite journal | vauthors = Patterson DJ | title = The Diversity of Eukaryotes | journal = The American Naturalist | volume = 154 | issue = S4 | pages = S96–S124 | date = October 1999 | pmid = 10527921 | doi = 10.1086/303287 | s2cid = 4367158 }}</ref>

Some other euglenozoa feed through absorption, and many euglenids possess [[chloroplast]]s, the only eukaryotes outside [[plants+HC+SAR megagroup|Diaphoretickes]] to do so without performing [[kleptoplasty]],<ref>{{Cite journal |last1=Burki |first1=Fabien |last2=Roger |first2=Andrew J. |last3=Brown |first3=Matthew W. |last4=Simpson |first4=Alastair G.B. |date=2020-01-01 |title=The New Tree of Eukaryotes |url=https://linkinghub.elsevier.com/retrieve/pii/S0169534719302575 |journal=Trends in Ecology & Evolution |volume=35 |issue=1 |pages=43–55 |doi=10.1016/j.tree.2019.08.008 |pmid=31606140 |issn=0169-5347}}</ref><ref>{{Cite journal |last1=Sibbald |first1=Shannon J. |last2=Archibald |first2=John M. |date=2020-05-20 |title=Genomic Insights into Plastid Evolution |url=https://academic.oup.com/gbe/article/12/7/978/5836826 |journal=Genome Biology and Evolution |volume=12 |issue=7 |pages=978–990 |doi=10.1093/gbe/evaa096|pmid=32402068 |pmc=7348690 }}</ref> and so obtain energy through [[photosynthesis]]. These chloroplasts are surrounded by three membranes and contain [[chlorophyll]]s ''A'' and ''B'', along with other pigments, so are probably derived from a  [[green alga]], captured long ago in an [[endosymbiosis]] by a basal euglenozoan.  Reproduction occurs exclusively through cell division.  During [[mitosis]], the nuclear membrane remains intact, and the spindle microtubules form inside of it.<ref name="Pat1999"/>

The group is characterized by the ultrastructure of the flagella.  In addition to the normal supporting microtubules or [[axoneme]], each contains a rod (called ''paraxonemal''), which has a tubular structure in one flagellum and a latticed structure in the other.  Based on this, two smaller groups have been included here: the [[diplonemid]]s and ''[[Postgaardi]]''.<ref name="Sim1997">{{cite journal | vauthors = Simpson AG | title = The Identity and Composition of Euglenozoa | journal = Archiv für Protistenkunde | year = 1997 | volume = 148 | issue = 3 | pages = 318–328 | doi=10.1016/s0003-9365(97)80012-7}}</ref>