References cited
- BARNES , C. R. , NORFORD , B. S. and SKEVINGTON , D. 1981 . “ The Ordovician System in Canada ” . In International Union of Geological Sciences , Publication no. 8 27
- COLBATH , G. K. 1979 . Organic‐walled microphytoplankton from the Eden Shale (Upper Ordovician), Indiana, U.S.A. . Palaeontographica, Abteilung B , 171 : 1 – 38 .
- JACOBSON , S. R. 1978 . Acritarchs from the Upper Ordovician Clays Ferry Formation, Kentucky, U.S.A. . Palinologia, numero ex‐traordinario , 1 : 293 – 301 .
- _____ . 1979 . Acritarchs as paleoenvironmental indicators in the Middle and Upper Ordovician rocks from Kentucky, Ohio and New York . Journal of Paleontology , 53 (5) : 1197 – 1212 .
- LEGAULT , J. A. 1982 . First report of Ordovician (Caradoc‐Ashgill) paly‐normorphs from Orphan Knoll, Labrador Sea . Canadian Journal of Earth Sciences , 19 (9) : 1851 – 1856 .
- LIBERTY , B. A. 1969 . Paleozoic geology of the Lake Simcoe area, Ontario . Geological Survey of Canada , : 163 Memoir 360
- LOEBLICH , A. R. JR. 1970 . Dicommopalla, a new acritarch genus from the Dills‐boro Formation (Upper Ordovician) of Indiana, U.S.A . Phycologia , 9 (1) : 39 – 43 .
- LOEBLICH , A. R. JR. and TAPPAN , H. 1978 . Some Middle and Late Ordovician microphytoplankton from central North America . Journal of Paleontology , 52 : 1233 – 1287 .
- MARTIN , F. 1983 . Chitinozoaires et acritarches ordoviciens de la plateforme du Saint‐Laurent (Quebec et sud‐est de l'Ontario) . Geological Survey of Canada, Bulletin , 310 : 59
- MELCHIN , M. J. 1982 . “ Ordovician chitinozoans from the Simcoe Group, southern Ontario ” . 370 Waterloo , Ontario : University of Waterloo . Unpubl. M. Sc. thesis