Discovery of 505-million-year old chitin in the basal demosponge Vauxia gracilenta von Ehrlich, H., Rigby, J. Keith, Botting, J. P., Tsurkan, M. V., Werner, C., Schwille, P., Petrášek, Z., Pisera, A., Simon, P., Sivkov, V. N., Vyalikh, D. V., Molodtsov, S. L., Kurek, D., Kammer, M., Hunoldt, S., Born, R., Stawski, D., Steinhof, A., Bazhenov, V. V., Geisler, T.

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FIRST OCCURRENCE OF AN IN SITU ANTHASPIDELLID SPONGE IN A DENDROLITE MOUND (UPPER CAMBRIAN; GREAT BASIN, USA) von SHAPIRO, RUSSELL S, KEITH RIGBY, J

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Long expected sponges from the Neoproterozoic Ediacara fauna of South Australia von Gehling, James G., Rigby, J. Keith

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FIRST HEXACTINELLID SPONGE REPORTED FROM THE UPPER TRIASSIC NAYBAND FORMATION OF CENTRAL IRAN von RIGBY, J. KEITH, SENOWBARI-DARYAN, B

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Middle Cambrian protospongiid sponges and chancelloriids from the Precordillera of Mendoza Province, western Argentina von Rigby, J. Keith, Beresi, Matilde S

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Middle Cambrian Sponges from the Drum Mountains and House Range in Western Utah von Rigby, J. Keith, Church, Stephen B, Anderson, Nicolle K

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A NEW ORDOVICIAN CHIASTOCLONELLID SPONGE FROM INNER MONGOLIA, CHINA von RIGBY, J. KEITH, KESSEL, BENJAMIN J, RITTS, BRADLEY D, FRIEDMAN, SCOTT J

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A new occurrence of the “hydrozoan” Radiotrabeculopora reticulata Fan, Rigby, and Zhang, 1991 in the Permian of California von Rigby, J. Keith, Linder, Gloria A., Stevens, Calvin H.

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Emsian (Late Early Devonian) Sponges from West-Central and South-Central Alaska von Rigby, J. Keith, Blodgett, Robert B, Anderson, Nicolle K

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A NEW, LARGE, LATE PLEISTOCENE DEMOSPONGE FROM SOUTHEASTERN FLORIDA von Rigby, J. Keith, Cunningham, Kevin J.

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Gradual Dinosaur Extinction and Simultaneous Ungulate Radiation in the Hell Creek Formation von Sloan, Robert E., Rigby, J. Keith, Van Valen, Leigh M., Gabriel, Diane

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Pennsylvanian Sponges from the Graford Formation, Wise County, Texas von Rigby, J. Keith, McKinzie, Mark G, Britt, Brooks B

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SPONGES FROM THE REEF TRAIL MEMBER OF THE UPPER GUADALUPIAN (PERMIAN) BELL CANYON FORMATION, GUADALUPE MOUNTAINS NATIONAL PARK, TEXAS von RIGBY, J. KEITH, BELL, GORDEN L

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Silurian Sponges and Some Associated Fossils from the Heceta Limestone, Prince of Wales Island, Southeastern Alaska von Rigby, J. Keith, Rohr, David M, Blodgett, Robert B, Britt, Brooks B

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Fossil sponges from a localized cold-seep limestone in Oligocene rocks of the Olympic Peninsula, Washington von Rigby, J. Keith, Goedert, James L.

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HEXACTINELLID AND ASSOCIATED SPONGES FROM THE UPPER REEF TRAIL MEMBER OF THE BELL CANYON FORMATION, SOUTHERN GUADALUPE MOUNTAINS NATIONAL PARK, TEXAS von RIGBY, J. KEITH, BELL, GORDEN L, THOMPSON, KIRSTEN

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Lower Ordovician lithistid sponges from the eastern Yangtze Gorge area, Hubei, China von Bingli, Liu, Rigby, J. Keith, Yanwen, Jiang, Zhongde, Zhu

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First reported occurrence of wewokellid sponges (Calcarea, Heteractinida) from the Permian of central Iran von Rigby, J. Keith, Senowbari-Daryan, Baba, Hamedani, Ali

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Wewokella costata new species, a large heteractinid calcareous sponge from the upper Mississippian Hartselle sandstone in Northeastern Alabama von Rigby, J. Keith, Keyes, Richard

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Brachiopod mounds not sponge reefs, Permian Capitan-Tansill Formations, Guadalupe Mountains, New Mexico von Senowbari-Daryan, Baba, Rigby, J. Keith

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