Order Sigmatosclerophorida Burton 1956 (demosponge)

Demospongiae - Sigmatosclerophorida

Parent taxon: Ceractinomorpha according to R. M. Finks et al. 2004

Sister taxa: Halisarcida, Medfraspongia, Vaceletida, Verongida

Subtaxa: Dystactospongiidae

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Ecology: stationary epifaunal suspension feeder

Distribution:

• Ordovician of the United Kingdom (1 collection), United States (35: Alabama, Idaho, Indiana, Ohio, Tennessee, Virginia)

Total: 36 collections including 37 occurrences

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