Tyzzeria

Tyzzeria
Scientific classification
Domain:	Eukaryota
(unranked):	Sar
(unranked):	Alveolata
Phylum:	Apicomplexa
Class:	Conoidasida
Order:	Eucoccidiorida
Family:	Eimeriidae
Genus:	Tyzzeria
Species
	; ; ; ; ; ; ; ; ; ; ; ;

Tyzzeria is a genus of parasitic alveolates that with one exception (Tyzzeria boae) infect the cells of the small intestine.^[1]

History[]

The genus Tyzzeria was first described by Allen in 1936.^[2]

As is all too common in protozoal taxonomy the validity of several of the species is controversial. Species occurring in Anseriforme birds appear to be valid whereas the other species may be misidentifications. The application of DNA based methods it is to be hoped will resolve these matters.

Description[]

The oocysts lack sporocysts: each oocyst possesses eight sporozoites.

Host-parasite relations[]

Tyzzeria allenae - common goldeneye ()
Tyzzeria boae - red tailed boa (Boa constrictor constrictor)
Tyzzeria chalcides - ocellated skink (Chalcides ocellatus)
Tyzzeria chenicusae - common goldeneye ()
Tyzzeria galli - Ceylon jungle fowl ()
Tyzzeria natrix - yamakagashi (Rhabdophis tigrinus)
Tyzzeria parvula - greater white-fronted goose (Anser albifrons), greylag goose (Anser anser), snow goose (Anser caerulescens), Ross' goose (Anser rossii), brent goose (Branta bernicla), Canada goose (Branta canadensis), tundra swan (Cygnus columbianus)
Tyzzeria pellerdyi - northern pintail (Anas acuta), American wigeon (Anas americana), northern shoveler (Anas clypeata), common teal (Anas crecca), blue-winged teal (Anas discors), mallard (Anas platyrhynchos), gadwall (Anas strepera), ferruginous duck (Aythya nyroca)
Tyzzeria perniciosa - northern pintail (), mallard (Anas platyrhynchos), lesser scaup (), lesser white-fronted goose (), tufted duck (), white-headed duck (Oxyura leucocephala), common shelduck ()
Tyzzeria peomysci - white-footed mouse (Peromyscus leucopus), deer mouse 'Peromyscus maniculatus)
Tyzzeria perniciosa - lesser scaup (Aythya affinis)
Tyzzeria typhlopis - European blind snake (Typhlops vermicularis)

References[]

^ http://wildlife1.wildlifeinformation.org/S/0zProctista/apic_tyzzeria/tyzzeria.htm^{[dead link]}
^ Allen EA (1936) Tyzzeria perniciosa gen. et sp. nov., a coccidium from the small intestine of Pekin Duck, Anas domesticus L. Archiv für Protistenkunde 87, 262-267

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[1] ttp://wildlife1.wildlifeinformation.org/S/0zProctista/apic_tyzzeria/tyzzeria.htm^{[dead link]}

[Allen1936-2] Allen EA (1936) Tyzzeria perniciosa gen. et sp. nov., a coccidium from the small intestine of Pekin Duck, Anas domesticus L. Archiv für Protistenkunde 87, 262-267

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[2]