KoMenZi Fm., HongGeDa and TianZhu Counties, GanSu Prov., China (Ordovician to of China)

Where: GanSu, China (37.0° N, 103.0° E: paleocoordinates 29.1° S, 116.2° E)

• local area-level geographic resolution

When: Koumengzi Formation, Cautleyan to Cautleyan (449.2 - 443.4 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified, black, yellow, argillaceous sandstone and limestone

• black muddy sandstone, black slate and limestone; light yellow sandstone 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 8569: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 02.08.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Abrograptidae
Reteograptus sp.
Reteograptus sp. graptolite
 Graptoloidea - Retiolitidae
Glyptograptus sp.
Glyptograptus sp. Lapworth 1873 graptolite
 Graptoloidea - Climacograptidae
Climacograptus sp.
Climacograptus sp. Hall 1865 climacograptid
 Dendroidea - Dendrograptidae
Dendrograptus sp.
Dendrograptus sp. Hall 1858 graptolite
Lingulata
 Lingulida - Obolidae
Lingulella sp.
Lingulella sp. Salter 1866
Rhynchonellata
 Orthida - Plaesiomyidae
Dinorthis sp.
Dinorthis sp. Hall and Clarke 1892
 Orthida - Orthidae
Orthis sp.
Orthis sp. Dalman 1828
 Orthida - Orthidiellidae
Orthidiella sp.
Orthidiella sp. Ulrich and Cooper 1936
 Orthida - Platystrophiidae
Platystrophia sp.
Strophomenata
 Strophomenida - Leptellinidae
Leptelloidea sp.
Leptelloidea sp. Jones 1928
Gastropoda
 Euomphalina - Macluritidae
Maclurites sp.
Maclurites sp. Le Sueur 1818 snail
 Murchisoniina - Hormotomidae
Hormotoma sp.
Hormotoma sp. Salter 1859 snail