Kunming, Yu'anshan Formation, 0–5 cm above the seafloor (Cambrian of China)

Where: Yunnan, China (24.9° N, 102.8° E: paleocoordinates 36.5° N, 162.5° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Yu'anshan Formation, Early/Lower Cambrian (538.8 - 509.0 Ma)

Environment/lithology: offshore; silty mudstone and mudstone

• mudstone and silty mudstone of the Yu'anshan Formation's Lithofacies 2 and 3,which represent deposits during the early stages of the regressive phase in a proximal offshore to lower shoreface environment

Size class: microfossils

Primary reference: W. Wu, M. Zhu, and M. Steiner. 2014. Composition and tiering of the Cambrian sponge communities. Palaeogeography, Palaeoclimatology, Palaeoecology 398:86-96 [W. Kiessling/M. Krause]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 156226: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 13.05.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Hexactinellida
 Reticulosa - Dictyospongiidae
Hyalosinica sp. Steiner et al. 1993 glass sponge
 Reticulosa - Protospongiidae
Quadrolaminiella crassa Chen et al. 1990 glass sponge
Quadrolaminiella diagonalis Chen et al. 1990 glass sponge
Saetaspongia densa Mehl and Reitner 1993 glass sponge
Triticispongia diagonata Steiner et al. 1993 glass sponge
Protospongia sp. Salter 1864 glass sponge
 Reticulosa -
Demospongiae
 Verticillitida - Colospongiidae
"Cystospongia globosa" = Imbricatocoelia
"Cystospongia globosa" = Imbricatocoelia demosponge
 Halichondrida -
Ptilispongia maotianshanensis n. sp. Wu et al. 2014 demosponge
Ischnspongia dendritica Wu et al. 2014 demosponge
 Protomonaxonida - Choiidae
Choia ridley demosponge
Choia carteri Walcott 1920 demosponge
Choia hindei Dawson 1896 demosponge
Choia cf. utahensis Walcott 1920 demosponge
Allantospongia mica Rigby and Hou 1995 demosponge
 Protomonaxonida - Halichondritidae
Halichondrites cf. elissa Walcott 1920 demosponge
 Protomonaxonida - Leptomitidae
Leptomitella conica Chen et al. 1989 demosponge
Leptomitella confusa Chen et al. 1989 demosponge
Paraleptomitella globula Chen et al. 1989 demosponge
Paraleptomitella dictyodroma Chen et al. 1989 demosponge
Leptomitus teretiusculus Chen et al. 1989 demosponge
 Protomonaxonida - Hamptoniidae
Hamptonia chengjiangensis Wu et al. 2014 demosponge
 Protomonaxonida - Wapkiidae
Wapkia grandis Walcott 1920 demosponge