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WORKING CLASSIFICATION OF THE GASTROPODA 241<br />

Paleozoic molluscs of uncertain<br />

systematic position<br />

Paleozoic molluscs of uncertain position<br />

within Mollusca (Gastropoda or Monoplacophora)^<br />

Unassigned to superfamily<br />

t Family Khairkhaniidae Missarzhevsky, 1989<br />

t Family Ladamarekiidae Fryda, 1998<br />

t Family Metoptomatidae Wenz, 1938<br />

t Family Patelliconidae Fryda, 1998<br />

t Family Protoconchoididae Geyer, 1994^<br />

SPP Archinacelloidea Knight, 1952<br />

t Family Archinacellidae Knight, 1952^<br />

t Family Archaeopragidae Horny, 1963<br />

SPF Pelagielloidea Knight, 1956 [= Orthos-<br />

trophina]'*<br />

t Family Pelagiellidae Knight, 1956 [= Proeccyliopteridae<br />

Kobayashi, 1962 (n.a.); = Protoscaevogyridae<br />

Kobayashi, 1962 (n.a.)]<br />

t Family Aldanellidae Linsley & Kier, 1984<br />

SPF Scenelloidea S. A. Miller, 1889<br />

t Family ScENELLiDAE S. A. Miller, 1 889 [= Helcionellinae<br />

Wenz, 1938; = Hampilininae Kobayashi,<br />

1958; = Securiconidae Missarzhevsky, 1989]<br />

t Family Coreospiridae Knight, 1947 [= Archaeospiridae<br />

Yu, 1979; = Yangtzespirinae Yu, 1984;<br />

= Latouchellidae Golikov & Starobogatov, 1 989]<br />

t Family Igarkiellidae Parkhaev, 2001<br />

SPF YocHELCiONELLOiDEA & Jell, 1 976<br />

t Family Yochelcionellidae Runnegar & Jell,<br />

1976 [= Enigmaconidae MacKinnon, 1985]<br />

t Family Stenothecidae Runnegar & Jell, 1 980<br />

SF Stenothecinae Runnegar & Jell, 1980<br />

[= Mellopegmidae Missarzhevsky, 1989]<br />

SF Watsonellinae Parkhaev, 2001<br />

t Family Trenellidae Parkhaev, 2001<br />

Paleozoic molluscs with isostrophically<br />

coiled shells of uncertain position within<br />

Mollusca (Gastropoda or Monoplacophora)^<br />

SPF Bellerophontoidea McCoy, 1852*^<br />

t Family Bellerophontidae McCoy, 1852<br />

SF Bellerophontinae McCoy, 1852 [= Liljeval-<br />

lospiridae Golikov & Starobogatov, 1989]<br />

SF Bucanopsinae Wahlman, 1992<br />

SF Cymbulariinae Horny, 1963<br />

SF Knightitinae Knight, 1956<br />

t Family Bucanellidae Koken, 1925<br />

t Family BucANiiDAE Ulrich & Scofield, 1897<br />

SF BucANiiNAE Ulrich & Scofield, 1897<br />

[= Grandostomatinae Horny, 1962]<br />

SF Plectonotinae Boucot & Yochelson, 1 966<br />

T Plectonotini Boucot & Yochelson, 1966<br />

T BoucoTONOTiNi Fryda, 1999<br />

SF Salpingostomatinae Koken, 1925<br />

SF Undulabucaniinae Wahlman, 1992<br />

t Family EuPHEMiTiDAE Knight, 1956<br />

SF EuPHEMiTiNAE Knight, 1956<br />

SF Paleuphemitinae Fryda, 1999<br />

t Family Pterothecidae P. Fischer, 1883<br />

SF Pterothecinae P. Fischer, 1883<br />

SF Carinaropsinae Ulrich & Scofield, 1897<br />

SF Pedasiolinae Wahlman, 1992<br />

t Family SiNuiTiDAE Dall, 191<br />

SF SiNuiTiNAE Dall, 1913 [= Protowarthiidae<br />

Ulrich & Scofield, 1897 (inv.)]<br />

SF AiPTOspiRiNAEWang, 1980<br />

SF HisPANOSiNuiTiNAE Fryda & Gutierrez-Marco,<br />

1996<br />

t Family Tremanotidae Naef, 1913<br />

t Family Tropidodiscidae Knight, 1 956 [= Temnodiscinae<br />

Horny, 1963]<br />

Paleozoic molluscs with anisostrophically<br />

coiled shells of uncertain position within<br />

Mollusca (Gastropoda?)<br />

SPF Euomphaloidea White, 1877^<br />

t Family EuoMPHALiDAE White, 1877 [= Schizostomatidae<br />

Bronn, 1849 (inv.); = Euomphalop-<br />

teridae Koken, 1896; = Polytropidae Ulrich,<br />

1897 (inv.); = Straparollinae Cossmann,<br />

1916; = Poleumitidae Wenz, 1938]

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