@Article{bgd-4-385-2007,
AUTHOR = {Müller, W. E. G. and Li, J. and Schröder, H. C. and Qiao, L. and Wang, X.},
TITLE = {The unique skeleton of siliceous sponges (Porifera; Hexactinellida and Demospongiae) that evolved first from the Urmetazoa during the Proterozoic: a review},
JOURNAL = {Biogeosciences Discussions},
VOLUME = {4},
YEAR = {2007},
NUMBER = {1},
PAGES = {385--416},
URL = {http://www.biogeosciences-discuss.net/4/385/2007/},
ISSN = {1810-6277}
}