@Article{bg-4-219-2007,
AUTHOR = {Müller, W. E. G. and Jinhe Li,  and Schröder, H. C. and Li Qiao,  and Xiaohong Wang, },
TITLE = {The unique skeleton of siliceous sponges (Porifera; Hexactinellida and Demospongiae) that evolved first from the Urmetazoa during the Proterozoic: a review},
JOURNAL = {Biogeosciences},
VOLUME = {4},
YEAR = {2007},
NUMBER = {2},
PAGES = {219--232},
URL = {http://www.biogeosciences.net/4/219/2007/},
ISSN = {1726-4170}
}