Genus

Ooidium Timofeev, 1957

Classification
Organism groupBiota
Protista
Acritarcha
SupergenusAcanthosphaera
GenusAcanthodiacrodium
Acrosphaeridium
Actinotodissus
Actipillion
Akomachra
Ambiguaspora
Ammonidium
Aranidium
Arbusculidium
Archaeodiscina
Archaeopsophosphaera
Archaeosacculina
Arcosphaeridium
Aremoricanium
Arkonia
Aryballomorpha
Asteridium
Athabascaella
Axisphaeridium
Bacisphaeridium
Baltisphaeridium
Buchinia
Buedingiisphaeridium
Caldariola
Calyxiella
Carinatosphaeridium
Celtiberium
Ceratophyton
Cheleutochroa
Chlamydosphaeridia
Comasphaeridium
Coronitesta
Coryphidium
Costatilobus
Cristallinium
Cycloposphaeridium
Cymatiogalea
Cymatiosphaera
Dactylofusa
Dasydiacrodium
Dateriocradus
Deunffia
Dicommopalla
Dictyosphaeridium
Dictyotidium
Diexallophasis
Dilatisphaera
Domasia
Dominopolia
Dorsennidium
Elektroriskos
Elenia
Eliasum
Estiastra
Evittia
Excultibrachium
Ferromia
Filisphaeridium
Fimbriaglomerella
Florisphaeridium
Globosphaeridium
Goniosphaeridium
Gorgonisphaeridium
Granomarginata
Gyalorhethium
Hapsidopalla
Heliosphaeridium
Helosphaeridium
Impluviculus
Izhoria
Joehvisphaera
Kildinella
Kundasphaera
Labyrinthosphaeridium
Lacunosphaeridium
Ladogella
Leiofusa
Leiomarginata
Leiosphaeridia
Leiovalia
Liepaina
Liliosphaeridium
Loeblichia
Lophominuscula
Lophosphaeridium
Lunulidia
Lusatia
Margoporina
Metaleiofusa
Micrhystridium
Microconcentrica
Multiplicisphaeridium
Nanocyclopia
Navifusa
Nellia
Nexosarium
Nodosus
Nothooidium
Ooidium
Speciesrossicum
timofeevii
GenusOppilatala
Ordovicidium
Orthosphaeridium
Ovulum
Pachysphaeridium
Palaeocladophora
Palaeomonostroma
Papillomembrana
Parmasphaeridium
Passalosphaera
Petaloferidium
Peteinosphaeridium
Pheoclosterium
Pirea
Podolina
Poikilofusa
Polyancistrodorus
Polyedryxium
Polygonium
Primoflagella
Primophlagella
Priscogaleata
Priscotheca
Protosphaeridium
Pseudotasmanites
Pterospermella
Pterospermopsimorpha
Pterospermopsis
Pulvinosphaeridium
Raphesphaera
Raplasphaera
Revinotesta
Rhopaliophora
Sacculidium
Saharidia
Salopidium
Schismatosphaeridium
Schizodiacrodium
Skiagia
Solisphaeridium
Spumiosa
Stellechinatum
Stelliferidium
Stelomorpha
Stictosoma
Striatostellula
Striatotheca
Synsphaeridium
Taeniosphaeridium
Tasmanites
Teophipolia
Timofeevia
Tranvikium
Trichosphaeridium
Trunculumarium
Tuberculum
Tunisphaeridium
Tylotopalla
Tynnia
Veryhachium
Vesiculosphaera
Villosacapsula
Visbysphaera
Vogtlandia
Volkovia
Vulcanisphaera
Winwaloeusia
Zinkovioides
SubgenusBrochopsophosphaera
Eupoikilofusa
SpeciesAmpullula
Leiodiscina
unrankedChalaziosphaeridium
Retisphaeridium