USNM9270, Phangnga (Permian of Thailand)

Where: Thailand (8.5° N, 98.5° E: paleocoordinates 32.1° S, 106.3° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Rat Buri Formation, Roadian (272.3 - 268.8 Ma)

• Brachiopod-bearing bed is visible in the cliff wall about 30 feet above the ground but is inaccessible. Blocks containing fossils have fallen from the cliff and lie along the base. The age of the Rat Buri fauna is problematic. "Rat Buri" limestones likely range in age from Kungurian through Capitanian to perhaps Wuchiapingian. Wordian fusulinids appear most common in other collections, but are not found in association with the brachiopod localities. The brachopod fauna is most similar to the Wordian Amb Formation of the Salt Range, in Pakistan, tentatively indicating a Wordian age.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; argillaceous, cherty/siliceous limestone

• Dark limestone with a great amount of mud; the blocks that had abundant Bilotina acantha also contained a lot of chert and porous siliceous material forming a fine meshwork of silica through the rock.

Size class: macrofossils

Preservation: replaced with silica

Collection methods: bulk, surface (float), chemical,

Primary reference: R. E. Grant. 1976. Permian brachiopods from southern Thailand. Paleontological Society Memoir 9:1-269 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 40868: authorized by David Bottjer, entered by Matthew Clapham on 02.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Concentrates on brachiopods; some other groups are mentioned briefly in text.
 Fenestrida - Fenestellidae
 Cystoporida - Fistuliporidae
Crinoidea indet. Miller 1821 Sea lily
 Productida - Aulostegidae
Ramavectus pumwarni n. sp. Grant 1976
Echinosteginae indet. Muir-Wood and Cooper 1960
 Productida - Strophalosiidae
Heteralosia iphia Grant 1976
 Productida - Echinoconchidae
Bilotina acantha Waterhouse and Piyasin 1970
 Productida - Productellidae
"Marginifera drastica n. sp." = Marginifera (Marginifera) drastica, Celebetes gymnus n. gen. n. sp.
"Marginifera drastica n. sp." = Marginifera (Marginifera) drastica Grant 1976
Celebetes gymnus n. gen. n. sp. Grant 1976
 Productida - Productidae
Kozlowskia opipara n. sp. Grant 1976
 Productida - Linoproductidae
Linoproductus kaseti n. sp. Grant 1976
 Productida - Rugosochonetidae
Striochonetes cf. scutella Waterhouse and Piyasin 1970
 Productida - Lyttoniidae
Leptodus sp. Kayser 1883
 Athyridida - Neoretziidae
Hustedia ? ratburiensis Waterhouse and Piyasin 1970
 Athyridida - Athyrididae
Cleiothyridina seriata n. sp. Grant 1976
 Terebratulida - Gillediidae
Hemiptychina desticata n. sp. Grant 1976
 Spiriferinida - Spiriferellinidae
 Spiriferinida - Paraspiriferinidae
 Spiriferida - Trigonotretidae
Neospirifer sp. Fredericks 1919
 Spiriferida - Ingelarellidae
Martiniopsis trimmata n. sp. Grant 1976
 Spiriferida - Ambocoeliidae
Orbicoelia fraterculus Waterhouse and Piyasin 1970
 Spiriferida - Elythidae