URL: Hexactinellid and associated sponges from the upper Reef Trail Member of the Bell Canyon Formation, southern Guadalupe Mountains National Park, TexasAuthor Names: Rigby, J. KeithBell, Gorden L., Jr.Thompson, KirstenEra/Period/Epoch: PermianDocument type: AbstractPublication Type: Journal/Periodical ArticlePublication Title: Journal of PaleontologyPublication Volume Number: 81Publication Issue Number: 6Page Numbers:: 1241-1256Year/month of publication: 2007-11Short title: Sponges in Texas