XiaYan Fm., WuliGou and SuBei Counties, QingHai Prov., China (Ordovician of China)

Where: QingHai, China (40.0° N, 95.0° E: paleocoordinates 26.5° S, 128.1° E)

• local area-level geographic resolution

When: XiaYan Formation, Llandeilo (461.1 - 458.4 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified, black, gray, green, silty shale and sandstone

• gray to greenish to black silty slate with sandstone

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 8682: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 24.08.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Dicranograptidae
Dicranograptus sp.
Dicranograptus sp. Hall 1865 graptolite
Gastropoda
 Bellerophontida - Tropidodiscidae
Tropidodiscus sp.
Tropidodiscus sp. Meek and Worthen 1866 snail
Cephalopoda
 Tarphycerida - Trocholitidae
Discoceras sp.
Discoceras sp. Barrande 1867
 Orthocerida -
Cycloceras sp.
Cycloceras sp. M'Coy 1844
Trilobita
 Asaphida - Remopleurididae
Remopleurides sp.
Remopleurides sp. Portlock 1843 trilobite
 Asaphida - Asaphidae
Birmanites sp., Vogdesia sp.
Birmanites sp. Sheng 1934 trilobite
Vogdesia sp. Raymond 1910 trilobite
 Asaphida - Cyclopygidae
Cyclopyge sp.
Cyclopyge sp. Hawle and Corda 1847 trilobite
 Trinucleida - Raphiophoridae
Ampyx sp., Lonchodomas sp.
Ampyx sp. Dalman 1827 trilobite
Lonchodomas sp. Angelin 1854 trilobite
 Corynexochida - Illaenidae
Illaenus sp.
Illaenus sp. Dalman 1827 trilobite
 Phacopida - Cheiruridae
Placoparina sp.
Placoparina sp. Whittard 1940 trilobite