Leijiatun Formation, NE Guizhou, W Hunan, and SW Hubei Provinces (Silurian of China)

Also known as Codonophyllum-Qianbeilites-Spirocrinus Assemblage

Where: China (28.0° N, 108.0° E: paleocoordinates 7.2° N, 126.7° E)

• coordinate estimated from map

• basin-level geographic resolution

When: Spirograptus turriculatus graptolite zone, Leijiatun Formation, Telychian (438.5 - 433.4 Ma)

• Except where otherwise stated, ref. 7624 uses Lower Silurian as equivalent to Llandovery, Middle Silurian as equivalent to Wenlock, and Upper Silurian as equivalent to Ludlow plus Pridoli.

• formation-level stratigraphic resolution

Environment/lithology: marine; calcareous shale and limestone

• Correlation chart indicates BA 3 position.
• "The L. Fm. belongs to the shelly facies, although sometimes associated with graptolites. It is composed predominantly of yellow-green shale, with calcareous lenses or nodular marl in the lower and middle parts. The uppermost part is limestone and marl, which provide a clearly defined boundary with the overlying Majiaochong Fm. (entirely shale or mudstone)...The formation is...87 m thick."

Size class: macrofossils

Collection methods: Nautiloids said to be present, but are not listed.

Primary reference: E.-z. Mu, A. J. Boucot, X. Chen and J.-y. Rong. 1986. Correlation of the Silurian rocks of China. In A. J. Boucot and W. B. N. Berry (eds.), Geological Society of America Special Paper 202:1-80 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 27773: authorized by Michael Foote, entered by Michael Foote on 08.01.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Anthozoa
 Sarcinulida - Billingsariidae
 Favositida - Parastriatoporidae
Parastriatopora sp. Sokolov 1949 tabulate coral
 Favositida - Favositidae
Favosites sp. Lamarck 1816 tabulate coral
Mesofavosites sp. Sokolov 1951 tabulate coral
"Palaeofavosites sp." = Paleofavosites Twenhofel 1914 tabulate coral
 Heliolitida - Plasmoporidae
Plasmopora sp. Milne-Edwards and Haime 1849 tabulate coral
 Heliolitida - Halysitidae
Schedohalysites sp. Hamada 1957 tabulate coral
 Stauriida - Streptelasmatidae
Brachyelasma sp. Lang et al. 1940 horn coral
 Stauriida - Amplexidae
Pilophyllia sp. Ge and Yü 1974 horn coral
corrected from "Pilopohyllia"
Amplexoides sp. Wang 1947 horn coral
 Stauriida - Stauriidae
 Cystiphyllida - Goniophyllidae
Rhizophyllum sp. Lindström 1866 horn coral
 Cystiphyllida - Tryplasmatidae
Tryplasma sp. Lonsdale 1845 horn coral
 Cystiphyllida - Cystiphyllidae
Microplasma sp., "Hedstroemophyllum multispilatum" = Cystiphyllum (Hedstroemophyllum)
Microplasma sp. Dybowski 1873 horn coral
"Hedstroemophyllum multispilatum" = Cystiphyllum (Hedstroemophyllum) horn coral
corrected from "Hedstromophyllum"
Crinoidea
 Cyathocrinida - Petalocrinidae
Petalocrinus sp. Weller and Davidson 1896 Sea lily
Spirocrinus sp. Mu and Wu 1974 Sea lily
Pterobranchia
 Graptoloidea - Monograptidae
 Graptoloidea - Retiolitidae
Petalolithus sp. graptolite
 Dendroidea - Acanthograptidae
Rhynchonellata
 Orthida - Dalmanellidae
Isorthis sp. Kozlowski 1929
 Atrypida -
Zygospiraella sp. Nikiforova 1961
 Atrypida - Atrypidae
Atrypa sp. Dalman 1828
 Atrypida - Lissatrypidae
Lissatrypa sp. Twenhofel 1914
 Atrypida - Atrypinidae
Strophomenata
 Strophomenida - Aegiromenidae
Aegiromena sp. Havlícek 1961
 Strophomenida - Furcitellidae
Cephalopoda
 Nautiloidea -
Nautiloidea indet. Agassiz 1847 nautiloid
Trilobita
 Proetida - Proetidae
 Proetida - Aulacopleuridae
Songkania sp. Chang 1974 trilobite
 Phacopida - Encrinuridae
Encrinuroides sp. Reed 1931 trilobite
 Phacopida - Cheiruridae
"Shiqiania punctata" = Hyrokybe
"Shiqiania punctata" = Hyrokybe trilobite
 Harpetida - Harpetidae
"Aristoharpes sp." = Scotoharpes
"Aristoharpes sp." = Scotoharpes Lamont 1948 trilobite
 Corynexochida - Styginidae
Meitanillaenus sp. Zhang 1974 trilobite
 Corynexochida - Illaenidae
Ptilillaenus sp. Lu 1962 trilobite
 Odontopleurida - Odontopleuridae
Gaotania sp. Chang 1974 trilobite
Codonophyllum
  - Codonophyllidae