Xintan, Honghuayuan Formation ( of China)

Also known as Reef 3427

Where: Hubei, China (30.9° N, 110.8° E: paleocoordinates 17.0° N, 143.8° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Honghuayuan Formation, Tremadoc (486.5 - 477.7 Ma)

• Late Tremadoc, also known as Hunghuayuan Formation, upper member

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified reef rocks

• bigger patch reefs 4 m thick and 15 m wide, smaller reefs 0.5 m thick and 1 m wide, bryozoan framestones in the lower part of the reef core, sponges and Calathium as main reef builders in the upper part of the reef core

Size class: macrofossils

Collection methods: peel or thin section,

Primary reference: Y. Li, S. Kershaw, and X. Mu. 2004. Ordovician reef systems and settings in South China before the Late Ordovician mass extinction. Palaeogeography, Palaeoclimatology, Palaeoecology 205:235-254 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 61726: authorized by Wolfgang Kiessling, entered by Uta Merkel on 26.06.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
Brachiopoda
  -
Brachiopoda indet. Cuvier 1805
Stenolaemata
 Trepostomida -
Cephalopoda
 Nautiloidea -
Nautiloidea indet. Agassiz 1847 nautiloid
Trilobita
  -
Trilobita indet. Walch 1771 trilobite
 Pulchrilaminida - Pulchrilaminidae
Demospongiae
 Lithistida - Anthaspidellidae
Anthaspidella lamellata n. sp. Bingli et al. 1997 demosponge
Rhopalocoelia sanxiaensis n. sp. demosponge
Velellospongia adnata n. gen. n. sp. demosponge
Radiocyatha
  - Soanitidae
Calathium sp. Billings 1865
Hormogoneae
 Oscillatoriales - Girvanellaceae
Girvanella sp. Nicholson and Etheridge 1878