†family Sphaeragnostidae Kobayashi 1939 (artiopod)
Artiopoda - Agnostida - Sphaeragnostidae
Parent taxon: Agnostida according to H. B. Whittington et al. 1997
Sister taxa: Agnostina, Ceragnostus, Eodiscina, Formagnostus, Lavsanodiscus, Pleurinodus, Quadrahomagnostinae
Subtaxa: none
Ecology: slow-moving epifaunal detritivore
Distribution: there are no occurrences of Sphaeragnostidae in the database