Sapelnikoviella santuccii, a new gypidulinid brachiopod genus and species from the upper Silurian of Glacier Bay National Park & Preserve, Southeast Alaska ROBERT B. BLODGETT, ARTHUR J. BOUCOT, VALERYI V. BARANOV & DAVID M. ROHR BLODGETT, R.B., BOUCOT, A.J., BARANOV, V.V. & ROHR, D.M., 2013:04:26. Sapelnikoviella santuccii, a new gypidulinid brachiopod genus and species from the upper Silurian of Glacier Bay National Park & Preserve, Southeast Alaska. Memoirs of the Association of Australasian Palaeontologists 44, 65-72. ISSN 0810-8889. A new late Silurian (Ludlow) gypidulinid genus and species, Sapelnikoviella santuccii, is established from carbonate mudstone interbeds within an algal reef tract in shoreline exposures of the Willoughby Limestone on the southwest side of Drake Island in Glacier Bay, Southeast Alaska. The new brachiopod co-occurs with smooth atrypid brachiopods (Septatrypa) and less abundant high-spired gastropods (murchisoniids and less common Coelocaulus) in small nest-like accumulations between the algal buildups. Recent field work in Glacier Bay indicates that the Tidal Formation, formerly considered to overlie the shallow-water platform carbonates of the Willoughby Limestone, is now recognised as a laterally equivalent, deeper water basinal unit. A similar platform to basin transition is recognised to the immediate south on the northeastern part of Chichagof Island. Robert B. Blodgett (
[email protected]), 2821 Kingfisher Drive, Anchorage, Alaska 99502, USA. A.J. Boucot (boucota@ science.oregonstate.edu), Department of Zoology, Oregon State University, Corvallis, Oregon 97331, USA; Valeryi V. Baranov (
[email protected];
[email protected]), Institute of Diamond and Precious Metals Geology, Yakutsk Research Center, Siberian Division, Russian Academy of Sciences, pr.