Huai Tao T22, Lampang Province (Permian of Thailand)

Where: Thailand (18.7° N, 99.9° E: paleocoordinates 15.2° S, 88.6° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Huai Tak Formation (Ngao Group), Changhsingian (254.2 - 252.2 Ma)

• Huai Tak Formation is uppermost of Ngao Group, overlain by latest Permian volcanics and Triassic Lampang Group.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; shale

Size class: macrofossils

Preservation: mold/impression

Collection methods: mechanical,

Primary reference: J. B. Waterhouse. 1983. A Late Permian lyttoniid fauna from northwest Thailand. Papers - Department of Geology, University of Queensland 10(3):111-153 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 42775: authorized by David Bottjer, entered by Matthew Clapham on 05.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Only includes brachiopods. Fusilinids and conodonts are absent, as are corals, gastropods, and bryozoans. A number of pteriiform and myalinid bivalves and rare ammonoid impressions are present.
Show authors, comments, and common names
Bivalvia
 Autobranchia -
Pterioida indet.
Pterioida indet. Newell 1965 clam
Pteriiform bivalves
 Myalinida - Myalinidae
Myalinidae indet.
Myalinidae indet. Frech 1891 clam
Strophomenata
 Productida - Lyttoniidae
Oldhamina squamosa
Oldhamina squamosa Huang 1932
 Productida - Monticuliferidae
Sarytchevinella tenuissima
 Orthotetida - Meekellidae
Orthothetina sp.
Orthothetina sp. Schellwien 1900