progress in molecular and subcellular biology [marine molecular biotechnology]. Springer,
Berlin, pp 111–144
Woesz A, Weaver JC, Kazanci M, Dauphin Y, Aizenberg J, Morse DE, Fratzl P (2006)
Micromechanical properties of biological silica in skeletons of deep-sea sponges. J Mater
Res 21:2068–2078
Wu W, Yang AH, Janussen D, Steiner M, Zhu MY (2005) Hexactinellid sponges from the Early
Cambrian Black Shale of South Anhui, China. J Paleont 79:1043–1051
Xiao S, Laflamme M (2008) On the eve of animal radiation: phylogeny, ecology and evolution of
the Ediacara biota. Trends Ecol Evol 24:31–40
Xiao S, Yuan X, Knoll AH (2000) Eumetazoan fossils in terminal proterozoic phosphorites? Proc
Natl Acad Sci USA 97:13684–13689
Xiao S, Hu J, Yuan X, Parsley RL, Cao R (2005) Articulated sponges from the Early Cambrian
Hetang formation in southern Anhui, South China: their age and implications for early
evolution of sponges. Palaeogeogr Palaeoclimat Palaeoecol 220:89–117
Yang Q, Ma JY, Sun XY, Cong PY (2007) Phylochronology of early metazoans: combined
evidence from molecular and fossil data. Geol J 42:281–295
Zhang WT, Hou XG (1985) Preliminary notes on the occurrence of the unusual trilobite Naraoia in
Asia. Acta Palaeontol Sin 24:591–595 [In Chinese with English summary]
Zhang X, Liu W, Zhao Y (2008) Cambrian Burgess Shale-type Lagerst€ atten in South China:
distribution and significance. Gondwana Res 14:255–262
9 The Unique Invention of the Siliceous Sponges
281