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Palaeosigmoilopsis apenninica Chiocchini, 2008
Description Figs. 1, 5, 12, 15 - variously oriented longitudinal sections, paratypes;
fig. 2 - longitudinal section, holotype;
fig. 3 - transverse oblique section;
figs. 4, 9, 10, 13 - variously oriented longitudinal sections;
figs. 6, 7, 14 - transverse sections, paratypes;
fig. 8 - longitudinal oblique section showing the large simple tooth;
fig. 11 - transverse section of the specimen showing the planispiral arrangement
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