Exoschizon

Exoschizon
Scientific classification
Domain:	Eukaryota
(unranked):	Sar
(unranked):	Alveolata
Phylum:	Apicomplexa
Class:	Conoidasida
Subclass:	Gregarinasina
Order:	Archigregarinorida
Family:	Exoschizonidae
Genus:	Exoschizon

Exoschizon is a genus in the phylum Apicomplexa.

History

This genus was created by Levine in 1971.^[1]

Taxonomy

There is one genus currently recognised in this family - Exoschizon. This genus has only one species - Exoschizon siphonosomae - which was described by Hukui in 1939.^[2]

Description

This species was found in the intestine of a sipunculid worm (Siphonosoma cumanense) in Japan.

The meronts measure 90 µm × 15 µm. There are ~13 longitudinal striations per side.

The meronts and gamonts are similarly shaped.

Transmission is presumably by the orofaecal route.

References

↑ Levine ND (1971) Taxonomy of the Archigregarinorida and Selenidiidae (Protozoa, Apicomplexa) J Euk Microbiol 18 (4) 704–717 DOI: 10.1111/j.1550-7408.1971.tb03401.x
↑ Hukui (1939) J Fac Sci Hiroshima Univ 7: 17

Eukaryota: SAR: Alveolata

Domain

Archaea

Bacteria

Eukaryota

(Supergroup

Plant

Hacrobia

Heterokont

Alveolata

Rhizaria

Excavata

Amoebozoa

Opisthokonta

Animal

Fungi)

Ciliophora

Postciliodesmatophora	Heterotrichea (Stentor, Climacostomum, Blepharisma) Karyorelictea (Loxodes, Tracheloraphis)

Intramacronucleata	Spirotrichea (Stylonychia, Euplotes) Litostomatea (Balantidium, Dileptus) Phyllopharyngea (Chilodonella, Tokophrya) Armophorea (Metopus) Nassophorea (Nassula) Colpodea (Colpoda) Oligohymenophorea (Tetrahymena, Ichthyophthirius, Vorticella, Paramecium) Plagiopylea (Plagiopyla) Prostomatea (Coleps, Holophrya) Protocruziea (Protocruzia) Cariacotrichea (Cariacothrix caudata)

Mesodiniea (Mesodinium, Myrionecta)

Myzozoa

Apicomplexa

Aconoidasida

Haemospororida	Garniidae (Garnia) Haemoproteidae (Haemoproteus) Leucocytozoidae (Leucocytozoon) Plasmodiidae (Plasmodium)

Piroplasmida	Babesiidae (Babesia) Theileriidae (Theileria)

Conoidasida

Coccidia

Agamococcidiorida

Gemmocystidae (Gemmocystis)
Rhytidocystidae (Rhytidocystis)

Eucoccidiorida

Adeleorina

Adeleidae
Dactylosomatidae (Babesiosoma, Dactylosoma)
Haemogregarinidae (Haemogregarina)
Hepatozoidae (Hepatozoon)
Karyolysidae (Karyolysus)
Klossiellidae (Klossiella)
Legerellidae (Legerella)

Eimeriorina

Aggregatidae (Aggregata, Grasseella, Merocystis, Ovivora, Pseudoklossia, Selysina) Atoxoplasmatidae Barrouxiidae Calyptosporiidae Caryotrophidae Cryptosporidiidae (Cryptosporidium) Eimeriidae (Cyclospora, Eimeria, Isospora) Elleipsisomatidae Lankesterellidae Selenococcidiidae

Sarcocystidae	Sarcocystinae (Frenkelia, Sarcocystis) Toxoplasmatinae (Besnoitia, Hammondia, Hyaloklossia, Nephroisospora, Neospora, Toxoplasma)

Ixorheorida

Ixorheidae (Ixorheis)

Protococcidiorida

Angeiocystidae (Angeiocystis)
Eleutheroschizonidae (Coelotropha, Defretinella, Eleutheroschizon)
Grelliidae (Coelotropha, Grellia)
Mackinnoniidae (Mackinnonia)
Myriosporidae (Myriosporides, Myriospora)

Gregarinia

Archigregarinorida

Exoschizonidae (Exoschizon)
Selenidioididae (Filipodium, Merogregarina, Meroselenidium, Platyproteum, Selenidioides, Veloxidium)

Eugregarinorida

Aseptatorina	Aikinetocystidae Allantocystidae Diplocystidae Enterocystidae Ganymedidae Lecudinidae Monocystidae (Monocystinae, Oligochaetocystinae, Rhynchocystinae, Stomatophorinae, Zygocystinae) Schaudinnellidae Selenidiidae Thiriotiidae Urosporidae

Blastogregarinorina	Siedleckiidae (Siedleckia)

Septatorina	Fusionicae (Fusionidae) Gregarinicae (Cephaloidophoridae, Cephalolobidae, Didymophoridae, Gregarinidae, Hirmocystidae, Metameridae, Uradiophoridae) Porosporicae (Porosporidae) Stenophoricae (Acutidae, Amphiplatysporidae, Brustiophoridae, Cnemidosporidae, Dactylophoridae, Leidyanidae, Monoductidae, Monoicidae, Sphaerocystidae, Stenophoridae, Trichorhynchidae) Stylocephaloidea (Actinocephalidae, Stylocephalidae) Blabericolidae

Neogregarinorida

Schizogregarinina (Caulleryellidae, Ophryocystidae)
Gigaductidae (Gigaductus)
Lipotrophidae (Apicystis, Farinocystis, Lipotropha, Lipocystis, Mattesia, Menzbieria)
Schizocystidae (Lymphotropha, Machadoella, Schizocystis)
Syncystidae (Syncystis)

Apicomonadea

Chromerida	Chromeraceae (Chromera velia) Vitrellaceae (Vitrella brassicaformis)

Colpodellida	Colpodellidae (Colpodella)

Voromonadida	Alphamonadidae (Alphamonas) Voromonadidae (Voromonas)

Dinoflagellata

Dinokaryota	With a theca: Peridiniales (Pfiesteria, Peridinium) Gonyaulacales (Ceratium, Gonyaulax) Prorocentrales (Prorocentrum) Dinophysiales (Dinophysis, Histioneis, Ornithocercus, Oxyphysis) Without theca: Gymnodiniales (Gymnodinium, Karenia, Karlodinium, Amphidinium) Suessiales (Polarella, Symbiodinium)

Noctilucea	Noctilucales (Noctiluca)

Syndinea	Syndiniales: Amoebophryaceae (Amoebophyra) Duboscquellaceae (Duboscquella) Syndiniaceae (Hematodinium, Syndinium)

Other	Acrocoelidae (Acrocoelus) Ichthyodinium Oxyrrhinaceae (Oxyrrhis) Pronoctilucidae (Pronoctiluca) Psammosidae (Psammosa) Rastromonadida (Parvilucifera, Rastromonas)

Perkinsozoa

Perkinsea	Perkinsidae (Perkinsus) Phagodinida (Phagodinium)

Protoalveolata

Ellobiopsea

Ellobiopsidae (Elliobiocystis, Ellobiopsis, Thalassomyces)

Myzomonadea

Algovorida	Algovoridae (Algovora)

Chilovorida	Chilovoridae (Chilovora)

Squirmidea

Squirmidae (Platyproteum, Filipodium)

Acavomonidia

Acavomonadea	Acavomonadida (Acavomonas)

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