Silurian Gastropoda from the Alexander Terrane, southeast Alaska
Published:July 01, 2008
David M. Rohr, Robert B. Blodgett, 2008. "Silurian Gastropoda from the Alexander Terrane, southeast Alaska", The Terrane Puzzle: New Perspectives on Paleontology and Stratigraphy from the North American Cordillera, Robert B. Blodgett, George D. Stanley, Jr.
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Gastropods are described from Ludlow-age strata of the Heceta Limestone on Prince of Wales Island, southeast Alaska. They are part of a diverse megabenthic fauna of the Alexander terrane, an accreted terrane of Siberian or Uralian affinities. Heceta Limestone gastropods with Uralian affinities include Kirkospira glacialis, which closely resembles “Pleurotomaria” lindströmi Oehlert of Chernyshev, 1893, Retispira cf. R. volgulica (Chernyshev, 1893), and Medfracaulus turriformis (Chernyshev, 1893). Medfracaulus and similar morphotypes such as Coelocaulus karlae are unknown from rocks that are unquestionably part of the North American continent (Laurentia) during Late Silurian time....