†Extentitheca
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Orthothecimorpha - Circothecida
Parent taxon: Circothecida according to J. J., Jr. Sepkoski 2002
Sister taxa: Arathecus, Asijatheca, Costatheca, Kunyangotheca, Ladatheca, Leibotheca, Mojczatheca, Spinulitheca, Turcuthecidae, Uniformitheca
Subtaxa: none
Ecology: stationary epifaunal suspension feeder
Distribution: found only at Udzha River (Cambrian of Russian Federation)
Specimen images are retrieved through the ePANDDA API.
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