Permophiles

ContentsNotes from the SPS Secretary ...........................................................................................................................1Charles M. HendersonNotes from the SPS Chair ..................................................................................................................................2Bruce R. Wardlaw2001 Annual Report to the International Commission on Stratigraphy, IUGS ...............................................3Bruce R. WardlawHistological features of some Late Permian Hindeodus ..................................................................................6Andrey V. ZhuravlevUpdate on the definition for the base of the Changhsingian stage, Lopingian series .....................................8Shilong Mei, Charles M. Henderson, and Changqun CaoA Recommendation: A desirable area and sections for the GSSP of the Changhsingian lower boundary ....9Wang Cheng-yuan, Chen Li-de, and Tian Shu-ganAge of the Permian-Triassic Boundary and Mass Extinction ........................................................................11Ian Metcalfe and Roland MundilVolcanic ashes in the Upper Paleozoic of the southern Urals: their biostratigraphic constraints and potentialfor radiometric dating .................................................................................................................................13V. I. Davydov, V. V. Chernykh, B.I. Chuvashov, C. J. Northrup, T.A. Schiappa, and W. S. SnyderPaleobotany of the Upper Carboniferous/Lower Permian of the southern Urals. Part 3. Generative organsof gymnosperms ..........................................................................................................................................19S. V. NaugolnykhThe Bursumian Stage .......................................................................................................................................23Spencer G. Lucas, Barry S. Kues, and Karl KrainerTwo new types of megaspores from the Permian Gondwana Sequence of India ...........................................28A. K. Srivastava and Rajni TewariLatest Guadalupian-Earliest Lopingian Conodont Faunas from West Texas................................................ 31Bruce R. Wardlaw, Lance L. Lambert, and Merlynd K. NestellProposal for the GSSP for the Guadalupian/Lopingian Boundary .................................................................32Yugan Jin, Charles Henderson, Bruce Wardlaw, and Brian GlenisterAnnouncements:International Palaeontological Congress and new book announcement, Memoir 19 ( ICCP) ................................. 42Cover PhotosTop; Close-up view of the Guadalupian-Lopingian boundary interval at Penglaitan, Guangxi Province, China. Two potential boundarypositions at the base of bed upper 6i and base of 6k are indicated by arrows. Middle; Blue star is situated within the Laibin Limestonewhich was deposited as a shallow water lowstand succession with underlying deeper water Maokou to the left. Lower; Close-up ofMeishan section D and new dates for the P-T boundary (see Metcalfe and Mundil in this issue).