Phylum Mollusca Linnaeus, 1758 - molluscs
Conchifera Gegenbaur, 1878
see Subphylum Conchifera Gegenbauer, 1878
Cyrtosoma
Class Gastropoda Cuvier, 1795 - snails and slugs
Subclass †Archaeobranchia Parkhaev, 2001
Order †Helcionelliformes Golikov & Starobogatov, 1975
Superfamily †Yohelcionelloidea nom. null.
see Superfamily Yochelcionelloidea Runnegar & Jell, 1976
Family †Trenellidae Parkhaev, 2001
01 Genus †Figurina Parkhaev, 2001
02 Genus †Horsegullia Parkhaev, 2004
03 Genus †Mackinnonia Runnegar, 1990, nom. illeg.
04 Genus †Obscurella Vassiljeva, 1990, nom. illeg.
05 Genus †Oelandia Westergård, 1936
06 Genus †Parailsanella Zhegallo, 1987
07 Genus †Perssuakiella Peel, 1988
08 Genus †Prosinuites Poulsen, 1967
09 Genus †Rugaeconus Vassiljeva, 1990
10 Genus †Trenella Parkhaev, 2001
11 Genus †Tubatoconus Feng, Sun & Qian, 2000
12 Genus †Xianfengella He & Yang, 1982