Belongs within: Kinetoplastea.
The Trypanosomatida are a group of micro-organisms parasitic on vertebrates, some of which are known for causing serious diseases.
Characters (from Adl et al. 2012): Eukinetoplastic with kDNA network associated with ciliary basal body; uniciliated with cilium lacking hairs and emerging from anterior pocket, or emerging laterally and attached to body; phagotrophic or osmotrophic; cytostome, when present, simple and close to ciliary pocket; exclusively parasitic.
Trypanosomatida
| i. s.: Rhynchoidomonas AS12
| Angomonas deanei AS12, C-S18
| Strigomonas culicis AS12, C-S18
|--Trypanosoma [Trypanosomatidae] DF03
| | i. s.: T. avium RN72
| | T. congolense HH09
| | T. duttoni KK54
| | T. equiperdum IHR03
| | T. evansi P09
| | T. grayi C-S18
| | T. fringillinarum RN72
| | T. lewisi A71
| | T. rangeli C-S18
| | T. vivax A71
| |--+--T. avium DF03
| | `--T. cruzi DF03
| `--T. brucei DF03
| |--T. b. brucei PHK96
| |--T. b. gambiense PHK96
| `--T. b. rhodesiense PHK96
`--Leishmaniinae AS12
| i. s.: Wallaceina AS12
|--+--‘Leptomonas’ collosoma DF03
| `--+--Blastocrithidia culicis DF03
| `--Crithidia DF03
| |--C. fasciculata DF03
| |--C. luciliae PHK96
| `--C. oncopelti DF03
`--+--+--Phytomonas serpens DF03
| `--Herpetomonas DF03
| |--H. mariadeanei DF03
| `--+--H. megaseliae DF03
| `--H. samuelpessoai DF03
`--+--+--‘Blastocrithidia’ gerricola DF03
| `--Leptomonas DF03
| |--L. peterhoffi DF03
| `--L. seymouri LA03
`--+--Endotrypanum monterogeii DF03
`--Leishmania DF03
|--L. amazonensis HH09
|--L. braziliensis A71
|--L. donovani HH09
|--L. infantum HH09 [=L. donovani infantum E83]
|--L. major HH09
|--L. mexicana PF99
|--L. tarentolae HH09
`--L. tropica E83
*Type species of generic name indicated
REFERENCES
[AS12] Adl, S. M., A. G. B. Simpson, C. E. Lane, J. Lukeš, D. Bass, S. S. Bowser, M. W. Brown, F. Burki, M. Dunthorn, V. Hampl, A. Heiss, M. Hoppenrath, E. Lara, E. Le Gall, D. H. Lynn, H. McManus, E. A. D. Mitchell, S. E. Mozley-Stanridge, L. W. Parfrey, J. Pawlowski, S. Rueckert, L. Shadwick, C. L. Schoch, A. Smirnov & F. W. Spiegel. 2012. The revised classification of eukaryotes. Journal of Eukaryotic Microbiology 59 (5): 429–493.
[A71] Askew, R. R. 1971. Parasitic Insects. Heinemann Educational Books: London.
[C-S18] Cavalier-Smith, T. 2018. Kingdom Chromista and its eight phyla: a new synthesis emphasising periplastid protein targeting, cytoskeletal and periplastid evolution, and ancient divergences. Protoplasma 255: 297–357.
[DF03] Dyková, I., I. Fiala, J. Lom & J. Lukeš. 2003. Perkinsiella amoebae-like endosymbionts of Neoparamoeba spp., relatives of the kinetoplastid Ichthyobodo. European Journal of Protistology 39 (1): 37–52.
[E83] Ewald, P. W. 1983. Host-parasite relations, vectors, and the evolution of disease severity. Annual Review of Ecology and Systematics 14: 465–485.
[HH09] Hampl, V., L. Hug, J. W. Leigh, J. B. Dacks, B. F. Lang, A. G. B. Simpson & A. J. Roger. 2009. Phylogenomic analyses support the monophyly of Excavata and resolve relationships among eukaryotic "supergroups". Proceedings of the National Academy of Sciences of the USA 106 (10): 3859–3864.
[IHR03] Isobe, T., E. C. Holmes & G. Rudenko. 2003. The transferrin receptor genes of Trypanosoma equiperdum are less diverse in their transferrin binding site than those of the broad-host range Trypanosoma brucei. Journal of Molecular Evolution 56: 377–386.
[KK54] Klemmer, K., & H. E. Krampitz. 1954. Zur Kenntnis der Säugetierfauna Siziliens. Senckenbergiana Biologica 35 (3–4): 121–135.
[LA03] Longet, D., J. M. Archibald, P. J. Keeling & J. Pawlowski. 2003. Foraminifera and Cercozoa share a common origin according to RNA polymerase II phylogenies. International Journal of Systematic and Evolutionary Microbiology 53: 1735–1739.
[P09] Pape, T. 2009. Economic importance of Diptera. In: Brown, B. V., A. Borkent, J. M. Cumming, D. M. Wood, N. E. Woodley & M. A. Zumbado (eds) Manual of Central American Diptera vol. 1 pp. 65–77. NRC Research Press: Ottawa.
[PF99] Philippe, H., & P. Forterre. 1999. The rooting of the universal tree of life is not reliable. Journal of Molecular Evolution 49: 509–523.
[PHK96] Prescott, L. M., J. P. Harley & D. A. Klein. 1996. Microbiology 3rd ed. Wm. C. Brown Publishers: Dubuque (Iowa).
[RN72] Rutgers, A., & K. A. Norris (eds) 1972. Encyclopaedia of Aviculture vol. 1. London, Blandford Press.