Late Ordovician Orthide and Billingsellide Brachiopods from Anticosti Island, Eastern Canada : Diversity Change Through Mass Extinction
A monographic study that deals with a major marine faunal turnover during the Late Ordovician global greenhouse/icehouse episodes. It aims to document the diversity change of brachiopods (one of the major groups of marine life during the Ordovician Period) from pre-extinction to extinction times.
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Paleobiogeographical implications of the Ordovician orthides
Plates 138 76
adductor muscle adductor muscle scars adductor scars aditicules anterior commissure anteriorly antero-laterally Anticosti Island apex apical Barbarorthis laurentina bilobate brachiopods camerata capillae commissure conjoined shells convex Copper costellae crenulated dental plates diductor Dorsal interior dorsal medial dorsal valve Ellis Bay Formation epipunctae figs fossils fulcral plates genus Geological Survey Gnamptorhynchos Grindstone Member growth lines Harper Hebertella maria Hesperorthis hingeline Hirnantia holotype Homard Member interspace Junction Cliff Late Ordovician Lavache Member lectotype locality Lousy Cove Member Mantle canal margin maria Billings medial costa Mendacella uberis myophragm notothyrial platform Onniella tricapitata orthides Paleontology Parastrophinella paratype Paucicrura Plaesiomys carletona Platystrophia Prinsta Member Quebec rectimarginate relatively sagittifera Schuchert and Cooper Silurian sola specimens Stratigraphy sulcus Survey of Canada transverse trilobate cardinal process Twenhofel 1928 type species uberis Billings Umbo uniplicate Upper Ordovician Vauréal Formation Vellamo Vellamo diversa Velleda Member Ventral exterior ventral interarea ventral valve Vinlandostrophia regularis width Zuykov