†order Obolellida Rowell 1965 (lamp shell)
Parent taxon: Obolellata according to A. Williams et al. 2000
See also Bengtson 1992, Geyer 1994 and Sepkoski 2002
Sister taxon: Naukatida
Subtaxa: Cingulella Monoconvexa Nochoroiella Obolelloidea
Ecology: stationary epifaunal suspension feeder