caa a22 4500 38801721X CHVBK 20180307124914.0 cr unu---uuuuu 161130e199803 xx s 000 0 eng 10.1017/S0022336000036222 doi S0022336000036222 pii (NATIONALLICENCE)cambridge-10.1017/S0022336000036222 Silurian hexactinellid sponges from northern British Columbia, Canada [Elektronische Daten] [J. Keith Rigby, Joanne L. Nelson, B. S. Norford] Faunules of largely hexactinellid sponges have been collected from siltstones of Early Silurian Wenlock or latest Landovery age within the upper Road River Group from northern British Columbia. The assemblages include the new species: Protospongia columbiana, Hexatractiella pseudonevadensis and Cyathophycus akiensis. Other taxa described include the hexactinellids Protospongia conica Rigby and Harris, 1979, Hexatractiella nevadensis (Rigby and Stuart, 1988), Diagoniella sp., Gabelia pedunculus? Rigby and Murphy, 1983, and a specimen of the monaxonid demosponge Wareiella typicala Rigby and Harris, 1979. Also included is a fragment of what must have been a steeply obconical-cylindrical hexactinellid sponge of uncertain taxonomy; it has a skeleton of robust hexactines in an unquadruled net, above a root-tuft of 10-20 spicules. Other sponge impressions include small circular clusters of hexactines with radiating, to basketlike patterns and somewhat similar, isolated and dissociated, long probably roof tuft spicules and possible basal root tuft rosettes of monaxons. The faunules are similar to other outer continental margin, black shale, sponge assemblages of the Early Paleozoic Era, and include elements previously described from northern British Columbia and central Nevada. Copyright © The Paleontological Society Rigby J. Keith Department of Geology, Room 673 Widtsoe, Brigham Young University, Provo, Utah 84602-5111 aut Nelson Joanne L. Province of British Columbia, Geological Survey Branch, Ministry of Energy, Mines and Petroleum Resources, 1810 Blanchard Street, Vancouver, British Columbia V8V 1X4, Canada aut Norford B. S. Department of Geology and Geophysics, The University of Calgary, Calgary, Alberta T2N 1N4, Canada aut Journal of Paleontology Cambridge University Press 72/2(1998-03), 202-220 0022-3360 72:2<202 1998 72 JPA https://doi.org/10.1017/S0022336000036222 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022336000036222 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rigby J. Keith Department of Geology, Room 673 Widtsoe, Brigham Young University, Provo, Utah 84602-5111 aut NATIONALLICENCE 700 1- Nelson Joanne L. Province of British Columbia, Geological Survey Branch, Ministry of Energy, Mines and Petroleum Resources, 1810 Blanchard Street, Vancouver, British Columbia V8V 1X4, Canada aut NATIONALLICENCE 700 1- Norford B. S. Department of Geology and Geophysics, The University of Calgary, Calgary, Alberta T2N 1N4, Canada aut NATIONALLICENCE 773 0- Journal of Paleontology Cambridge University Press 72/2(1998-03), 202-220 0022-3360 72:2<202 1998 72 JPA CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge