Lower section, ZhongBao Group, SiHuiGou and YongDeng Counties, GanSu Prov., Chin (Ordovician of China)

Where: GanSu, China (37.0° N, 103.0° E: paleocoordinates 21.0° S, 126.0° E)

• local area-level geographic resolution

When: Arenig (478.6 - 466.0 Ma)

• ZhongBao Group

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified, black, gray, green, cherty/siliceous limestone and shale

• greenish grey andesitic tuff and slate, becoming black limestone and slate, with gray silicates in middle and andesitic lava and tuff at bottom

Primary reference: Stratigraphic Group of Quing Hai Province. 1980. Regional stratigraphic tables of the north western China region: Volume of NinXia Province. Geological Publishing House, Beijing, China [A. Miller/P. Novack-Gottshall]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 8575: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 04.08.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

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Pterobranchia
 Graptoloidea - Retiolitidae
Glyptograptus sp.
 Graptoloidea - Climacograptidae
Pseudoclimacograptus sp., Climacograptus sp.
Climacograptus sp. Hall 1865 climacograptid
 Graptoloidea - Dicranograptidae
Dicellograptus sp.
Dicellograptus sp. Hopkinson 1871 graptolite
 Graptoloidea - Diplograptidae
Amplexograptus sp.
 Graptoloidea - Dichograptidae
Didymograptus sp.
Didymograptus sp. McCoy 1851 graptolite
Gastropoda
 Murchisoniina - Eotomariidae
Liospira sp.
Liospira sp. Ulrich and Scofield 1897 snail
Strophomenata
 Strophomenida - Leptellinidae
Leptelloidea sp.
Leptelloidea sp. Jones 1928
 Strophomenida - Sowerbyellidae
Sowerbyella sp.
Sowerbyella sp. Jones 1928
 Strophomenida - Strophomenidae
Strophomena sp.
Strophomena sp. Rafinesque and De Blainville 1824
Rhynchonellata
 Orthida - Orthidae
Orthis sp.
Orthis sp. Dalman 1828
Trilobita
 Ptychopariida - Shumardiidae
Shumardia sp.
Shumardia sp. Billings 1862 trilobite
 Asaphida - Asaphidae
Megalaspides sp., Megistaspis sp.
Megalaspides sp. Brögger 1886 trilobite
Megistaspis sp. Jaanusson 1956 trilobite
 Asaphida - Nileidae
Nileus sp.
Nileus sp. Dalman 1827 trilobite
 Phacopida - Dalmanitidae
Dalmanitina sp.
Dalmanitina sp. Reed 1905 trilobite