A silicified Early Triassic marine assemblage from Svalbard Author Foster, William J. Jackson School of Geosciences, University of Texas, Austin, TX 78712, USA; & Earth Sciences, Plymouth University, Plymouth, PL 4 8 AA, UK; & Department of Earth Sciences, Natural History Museum, London, SW 7 5 BD, UK; Author Danise, Silvia Earth Sciences, Plymouth University, Plymouth, PL 4 8 AA, UK; & Department of Geology, University of Georgia, Athens, GA 30602, USA Author Twitchett, Richard J. Department of Earth Sciences, Natural History Museum, London, SW 7 5 BD, UK; text Journal of Systematic Palaeontology 2017 2016-11-10 15 10 851 877 http://dx.doi.org/10.1080/14772019.2016.1245680 journal article 10.1080/14772019.2016.1245680 1478-0941 10883052 3EBCAEF3-27C2-4216-9F18-89F195FA534F Genus Warthia Waagen, 1880 Type species. Warthia brevisinunata Waagen, 1880 ; Middle Permian , Salt Range , Pakistan . Diagnosis. The generic diagnosis follows Waterhouse (1963). Deeply involute planispirally coiled bellerophont gastropod, distinguished by absence of spiral ornament. Sinus is broad, usually with a short slit. Selenizone obscured by inductural layer. Ornament of faint growth lines and growth wrinkles. Umbilicus generally filled.