Guojiashan Section, Bed 20 (Triassic of China)

Where: Gansu, China (33.9° N, 104.5° E: paleocoordinates 17.9° N, 87.5° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Guojiashan Formation, Anisian (247.2 - 242.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Primary reference: J. Tong and D.H. Erwin. 2001. Triassic gastropods of the southern Qinling Mountains, China. Smithsonian Contributions to Paleobiology 92:1-47 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 119266: authorized by Matthew Clapham, entered by Matthew Clapham on 22.10.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Murchisoniina - Phymatopleuridae
? Worthenia "sp. B" de Koninck 1883 snail
Worthenia extendia n. sp. Tong and Erwin 2001 snail
 Murchisoniina - Gosseletinidae
? Gosseletina dangchangensis n. sp. Tong and Erwin 2001 snail
Ananias guojiashanensis Tong and Erwin 2001 snail
 Neritoina - Delphinulopsidae
Marmolatella complanata Stoppani 1857 snail
Marmolatella cf. complanata Stoppani 1857 snail
Platychilina sinensis n. sp. Tong and Erwin 2001 snail
Platychilina obliqua n. sp. Tong and Erwin 2001 snail
 Pleurotomarioidea - Stuorellidae
? Codinella sp. Kittl 1899 snail
 Pleurotomarioidea - Trochotomidae
Trochotoma (Discotoma) gansuensis n. sp. Tong and Erwin 2001 snail
 Pleurotomarioidea - Zygitidae
Zygites laevigatus n. sp. Tong and Erwin 2001 snail
 Euomphalina -
? Triassocirrus sp. Yin and Yochelson 1983 snail
 Caenogastropoda - Coelostylinidae
Omphaloptycha gansuensis n. sp. Tong and Erwin 2001 snail
 Heterostropha - Tofanellidae
Neodonaldina cf. elongata Zardini 1978 snail
 Neritoidea - Naticopsidae
Naticopsis (Dicosmos) compressus n. sp. Tong and Erwin 2001 snail
? Naticopsis ribletella n. sp. Tong and Erwin 2001 snail
 Neritoidea - Neritariidae
Neritaria ingrandita Kittl 1894 snail
Neritaria candida Kittl 1894 snail
Neritaria sphaeroidica Picard 1903 snail