Dawan Fm., Ludipin Songtao, Guizhou Prov., China (Ordovician of China)

Where: Guizhou, China (28.0° N, 109.0° E: paleocoordinates 17.4° N, 138.1° E)

• local area-level geographic resolution

When: Dawan Formation, Dawan (478.6 - 468.1 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified, argillaceous limestone

• nodular muddy limestone

Primary reference: Guizhou Stratigraphic Work Group. 1977. Regional stratigraphic table of the southwestern region of China, Guizhou part. Geological Publishing House, Beijing [A. Miller/P. Novack-Gottshall]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 7385: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 25.05.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

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Pterobranchia
  -
Trigonograptus sp.
Trigonograptus sp. Lapworth 1873 graptolite
 Graptoloidea - Phyllograptidae
Phyllograptus sp., Tetragraptus sp.
Phyllograptus sp. Hall 1858 graptolite
Tetragraptus sp. Salter 1863 graptolite
 Graptoloidea - Dichograptidae
Didymograptus sp.
Didymograptus sp. McCoy 1851 graptolite
Rhynchonellata
 Pentamerida - Clarkellidae
Yangtzeella sp.
Yangtzeella sp. Kolarova 1925
Cephalopoda
 Endocerida - Endoceratidae
Dideroceras sp.
Dideroceras sp. Flower 1950
 Orthocerida - Baltoceratidae
Cochlioceras sp.
Cochlioceras sp. Eichwald 1860
 Ellesmerocerida - Protocycloceratidae
Protocycloceras sp.
Artiopoda
 Agnostida - Metagnostidae
Geragnostus sp.
Geragnostus sp. Howell 1935
Trilobita
 Phacopida - Pliomeridae
"Hammatocnemis sp." = Ovalocephalus
"Hammatocnemis sp." = Ovalocephalus Koroleva 1959 trilobite
 Asaphida - Nileidae
Nileus sp.
Nileus sp. Dalman 1827 trilobite
 Asaphida - Taihungshaniidae
Taihungshania sp.
Taihungshania sp. Sun 1931 trilobite
 Asaphida - Asaphidae
Megalaspides sp.
Megalaspides sp. Brögger 1886 trilobite
 Trinucleida - Trinucleidae
Hanchungolithus sp.
Hanchungolithus sp. Lu 1956 trilobite