Checkliste der Unterfamilie Tetradellinae Swartz, 1936
für die Region Ordovizium (Paläozoikum)
Gattungen für Ordovizium
6 Gattungen mit 33 Arten
Artenliste für Ordovizium
33 Arten | Ceratopsis chambersi Miller, 1874 | | | Ceratopsis humilinoda | | | Ceratopsis intemedia | | | Ceratopsis intermedia | | | Ceratopsis oculifera Hall, 1871 | | | Ceratopsis quadrifida | | | Ceratopsis trilobis | | | Ctenobolbina abrupta Harris, 1957 | | | Ctenobolbina bispinata Harris, 1957 | | | Ctenobolbina cancellata Harris, 1957 | | | Ctenobolbina ciliata Emmons, 1855 | | | Ctenobolbina duryi | | | Ctenobolbina emaciata | | | Ctenobolbina hammeli | | | Ctenobolbina inflata Harris, 1957 | | | Ctenobolbina maquoketensis | | | Ctenobolbina parva Harris, 1957 | | | Ctenobolbina percarinata Harris, 1957 | | | Ctenobolbina subcrassa | | | Ctenobolbina varicata Harris, 1957 | | | Dilobella simplex Krause, 1892 | | | Dilobella typa | | | Ogmoopsis variabilis Sarv, 1959 | | | Polyceratella bonnemai Thorslund, 1940 | | | Tetradella buckensis | | | Tetradella carinata | | | Tetradella complicata | | | Tetradella ellipsilira | | | Tetradella perplexa | | | Tetradella quadrilirata HALL & WHITF..., 1875 | | | Tetradella septinoda | | | Tetradella subquadrans | | | Tetradella ulrichi | |
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