Khao Phrik, Rat Buri (Permian of Thailand)

Where: Ratchaburi, Thailand (13.5° N, 99.7° E: paleocoordinates 31.0° S, 100.3° E)

• coordinate estimated from map

• outcrop-level geographic resolution

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

• 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: offshore shelf; lithified, argillaceous limestone and lithified, black, argillaceous, carbonaceous limestone

• Fore-reef that is relatively open to the sea
• Two kinds of rock: muddy pale limestone and a black limestone that left a large residue of carbonaceous clay

Size class: macrofossils

Preservation: replaced with silica

Collected by Waterhouse, Komalarjun, Nakinbodi, Sripatanavat in November, 1964

Collection methods: bulk, chemical,

Primary reference: J. B. Waterhouse and S. Piyasin. 1970. Mid-Permian brachiopods from Khao Phrik, Thailand. Palaeontographica Abteilung A 135(3-6):83-197 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 40954: authorized by David Bottjer, entered by Matthew Clapham on 04.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Strophomenata
 Productida - Aulostegidae
Urushtenia sp.2
2VV, 2DV, 3C
Ramavectus pumwarni2 Grant 1976
11DV
? Xenosteges sp. Muir-Wood and Cooper 1960
1VV, 1C
 Productida - Echinoconchidae
"Septasteges acanthus n. gen. n. sp." = Bilotina acantha
"Septasteges acanthus n. gen. n. sp." = Bilotina acantha Waterhouse and Piyasin 1970
1VV, 6DV, 1C
 Productida - Productellidae
Echinauris sp., "Marginifera otaria" = Marginifera (Otariella) otaria2, "Marginifera drastica" = Marginifera (Marginifera) drastica2
Echinauris sp. Muir-Wood and Cooper 1960
2DV
"Marginifera otaria" = Marginifera (Otariella) otaria2 Grant 1976
8VV, 5DV, 5C
"Marginifera drastica" = Marginifera (Marginifera) drastica2 Grant 1976
4VV, 1DV, 1C
 Productida - Monticuliferidae
? Compressoproductus sp. Sarytcheva 1960
1VV
Asperlinus asperulus Waagen 1884
10VV, 5DV
 Productida - Linoproductidae
Linoproductus kaseti2 Grant 1976
5 VV
 Productida - Rugosochonetidae
"Waagenites speciosus" = Waterhouseiella speciosa, Linshuichonetes elfinis1, Striochonetes scutella n. gen. n. sp.
"Waagenites speciosus" = Waterhouseiella speciosa Waterhouse and Piyasin 1970
36VV, 36DV, 79C
Linshuichonetes elfinis1 Campi and Shi 2002
Waagenites speciosus Partim - Pl 17, figs 12-25 Only
Striochonetes scutella n. gen. n. sp. Waterhouse and Piyasin 1970
42VV, 42DV, 62C
 Productida - Lyttoniidae
Leptodus sp. Kayser 1883
5VV, 9DV
 Productida - Richthofeniidae
Globosobucina scopae n. gen. n. sp. Waterhouse and Piyasin 1970
1C
 Orthotetida - Schuchertellidae
Streptorhynchus khwaense2 Grant 1976
7VV, 2C
 Orthotetida - Derbyiidae
Derbyia sp.2 Waagen 1884
1DV, 1C
Derbyia sp.2 Waagen 1884
1 VV
Diplanus (Miniplanus) minuta n. sp. Waterhouse and Piyasin 1970
21VV, 29DV, 5C
 Orthotetida - Meekellidae
Meekella colpata2 Grant 1976
2VV, 2DV
Rhynchonellata
 Athyridida - Neoretziidae
Hustedia ratburiensis n. sp. Waterhouse and Piyasin 1970
1VV, 5DV, 15C
 Athyridida - Diplospirellidae
Uncinella siamestris2 Grant 1976
1C
 Athyridida - Athyrididae
Cleiothyridina seriata2 Grant 1976
7VV, 2DV, 2C
 Terebratulida - Notothyrididae
Notothyris triplax n. sp.2 Grant 1976
20VV, 19DV, 19C
 Terebratulida - Cranaenidae
Pontielasma praeundatum n. gen. n. sp.
Pontielasma praeundatum n. gen. n. sp. Waterhouse and Piyasin 1970
3VV, 4DV, 9C
 Terebratulida - Gillediidae
Hemiptychina mintrita2 Grant 1976
3C
 Spiriferinida - Spiriferellinidae
Spiriferellina aduncata n. sp. Waterhouse and Piyasin 1970
84VV, 71DV, 81C
 Spiriferinida - Punctospiriferidae
? Punctospirifer sp. North 1920
1 VV
 Spiriferida - Trigonotretidae
Neospirifer sp.2 Fredericks 1919
3VV, 1DV
 Spiriferida - Crassumbidae
Rorespirifer ruinosus n. gen. n. sp.
Rorespirifer ruinosus n. gen. n. sp. Waterhouse and Piyasin 1970
3VV, 1DV, 1C
 Spiriferida - Ambocoeliidae
Orbicoelia fraterculus n. gen. n. sp.
Orbicoelia fraterculus n. gen. n. sp. Waterhouse and Piyasin 1970
11VV, 4DV, 1C
 Spiriferida - Elythidae
Anomaloria glomerosa2 Grant 1976
Phricodothyris attenuata Reed Partim - Pl 26, figs 9,14,15,18 Only
Permophricodothyris notialasiatica2 Grant 1976
13VV, 6DV, 1C
 Rhynchonellida -
Rhynchonellida indet. Kuhn 1949
1VV, 5C
 Rhynchonellida - Allorhynchidae
"Wellerella naliensis" = Allorhynchus naliensis
"Wellerella naliensis" = Allorhynchus naliensis Reed 1944
2VV, 2DV, 6C
 Orthida - Schizophoriidae
"Orthotichia waterhousei" = Kotlaia waterhousei2
"Orthotichia waterhousei" = Kotlaia waterhousei2 Grant 1976
10VV, 7DV, 4 C
 Orthida - Rhipidomellidae
Rhipidomella cordialis2 Grant 1976
1 Dorsal Valve, 1 Conjoined