Mutsara wokutanga: Zvicherwa zvacho, zvinowanzowanikwa muSt. Louis, zvinosanganisira makorari anonzi'Lithostrotion'ne' Lithostrotionella'uye anonzi'Rugosan'anonzi'Fenestrellina '. Mutsara wechipiri: Matongo anowanzowanikwa muSt. Louis anosanganisira makorari anonzi bryozoan Lithostrotion '' uye Lithostrotionella '' uye rugosan Fenestrellina ''. Mubvunzo: Mutsara wokutanga nomutsara wechipiri unoreva chinhu chimwe chete here? Hungu kana kuti Aiwa?
Hungu