USNM9271, Ko Muk Island northeast undivided: Roadian, Thailand

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa - Rugosa
Rugosa indet. Milne-Edwards and Haime 1850
Small horn coral that lacks any expression of septa within the calice
Anthozoa - Stauriida - Lophophyllidae
Lophophyllidium sp. Grabau 1928
Anthozoa - Stauriida - Plerophyllidae
Ufimia sp. Shtukenberg 1895
Plerophyllum sp. Hinde 1890
Anthozoa - Favositida - Pseudofavositidae
Pseudofavosites sp. Gerth 1922
Gastropoda
Pleurotomariacea indet. Swainson 1840
Abundant category
corrected as Pleurotomarioidea
5 or 6 genera
Gastropoda - Euomphalina
Euomphaloidea indet. (White 1877)
Abundant category
At least one
Bivalvia - Pectinida
Pectinoidea indet. Rafinesque 1815
Abundant category
Strophomenata - Strophomenida - Rugosochonetidae
Chonetinella cymatilis Grant 1976
13 specimens
Strophomenata - Productida - Cooperinidae
Ceocypea sp. Grant 1972
6 specimens
Strophomenata - Productida - Cyclacanthariidae
Acritosia sp. Cooper and Grant 1969
2 specimens
Strophomenata - Productida - Rigbyellidae
Rigbyella crassa Grant 1976
5 specimens
Strophomenata - Productida - Lyttoniidae
? Pseudoleptodus sp. Stehli 1956
1 specimen
? Eolyttonia sp. Frederiks 1924
2 specimens
Rhynchonellata - Rhynchonellida - Psilocamaridae
Goleomixa acymata Grant 1976
3 specimens
(5 measurements)
Rhynchonellata - Rhynchonellida - Wellerellidae
Uncinunellina sp. Grabau 1932
1 specimen
(2 measurements)
Rhynchonellata - Spiriferinida - Paraspiriferinidae
Paraspiriferina gentilis Grant 1976
8 specimens
(5 measurements)
Callispirina austrina Grant 1976
4 specimens
(17 measurements)
Rhynchonellata - Spiriferida - Ambocoeliidae
Cruricella couria Grant 1976
5 specimens
(16 measurements)
Rhynchonellata - Spiriferida - Spiriferellidae
Tipispirifer oppilatus Grant 1976
3 specimens
(27 measurements)
Rhynchonellata - Athyridida - Neoretziidae
Hustedia funaria Grant 1976
1 specimen
(5 measurements)
Hustedia ratburiensis Waterhouse and Piyasin 1970
30 specimens
(31 measurements)
Rhynchonellata - Athyridida - Athyrididae
Composita advena Grant 1976
2 specimens
recombined as Posicomta advena
(40 measurements)
Cleiothyridina tribulosa Grant 1976
1 specimen
(1 measurement)
Rhynchonellata - Athyridida - Diplospirellidae
Uncinella sp. Waagen 1883
2 specimens
Rhynchonellata - Terebratulida - Dielasmatidae
Dielasma sp. King 1856
2 specimens
(5 measurements)
Rhynchonellata - Terebratulida - Notothyrididae
? Notothyris sp. Waagen 1882
8 specimens
(4 measurements)
Stenolaemata - Cystoporata - Fistuliporidae
Fistuliporidae indet. Ulrich 1882
Large branching, bifoliate, and encrusting
Stenolaemata - Cryptostomata - Fenestellidae
Fenestellidae indet. King 1850
Abundant category
Coarse and fine mesh varieties
Stenolaemata - Cryptostomida
Cryptostomida indet. (Vine 1884)
original and current combination Cryptostomata
Bifoliate
Ostracoda
Ostracoda indet. Latreille 1802
1 specimen
Crinoidea
Crinoidea indet. Miller 1821
Abundant ossicles
Crinoidea - Dendrocrinida - Graphiocrinidae
Graphiocrinus sp. de Koninck and Le Hon 1854
Calyx
    = Contocrinus andamanensis n. sp. Webster and Jell 1993
Webster and Jell 1993
Only graphiocrinid in Webster & Jell
Crinoidea - Dendrocrinida - Apographiocrinidae
Apographiocrinus komukensis n. sp. Webster and Jell 1993
Webster and Jell 1993
Crinoidea - Poteriocrinina - Clathrocrinidae
Clathrocrinidae indet. Strimple and Moore 1971
Webster and Jell 1993
Blastoidea
Blastoidea indet. Say 1825
"Some" category
see common names

Geography
Country:Thailand State/province:Trang
Coordinates: 7.4° North, 99.3° East (view map)
Paleocoordinates:31.3° South, 107.5° East
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Permian Epoch:Guadalupian
Stage:Roadian 10 m.y. bin:Permian 3
Key time interval:Roadian
Age range of interval:272.30000 - 268.80000 m.y. ago
Stratigraphy
Formation:Rat Buri
Stratigraphic resolution:group of beds
Stratigraphy comments: Blocks are derived from seacliffs, making it impossible to measure a stratigraphic section or determine whether they are derived from a single horizon. 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.
Lithology and environment
Primary lithology: argillaceous,sandy "limestone"
Includes fossils?Y
Environment:offshore shelf
Geology comments: Interpreted as rather quiet water that was deep enough not to be disrupted by ordinary wave action. It was a fairly flat sea floor bearing an abundant fauna of small organisms with bryozoans and crinoids in patches like gardens.
Taphonomy
Modes of preservation:body,replaced with silica
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:bulk,surface (float),chemical,field collection
Reason for describing collection:paleoecologic analysis
Taxonomic list comments:Concentrates on brachiopods, and other groups are listed only in the text for the generic total collection, not for the subset individual blocks. Total includes 96 specimens that were collected separately from the 10 blocks and therefore does not exactly equal the sum of subset blocks.
Metadata
Database number:40870
Authorizer:D. Bottjer, M. Clapham Enterer:M. Clapham
Modifier:M. Clapham Research group:marine invertebrate
Created:2004-07-02 10:21:17 Last modified:2011-05-14 14:24:31
Access level:the public Released:2004-07-02 10:21:17
Creative Commons license:CC BY
Reference information

Primary reference:

11031. R. E. Grant. 1976. Permian brachiopods from southern Thailand. Paleontological Society Memoir 9:1-269 [D. Bottjer/M. Clapham/M. Clapham]

Secondary references:

23014 G. D. Webster and P.A. Jell. 1993. Early Permian inadunate crinoids from Thailand. Memoirs of the Queensland Museum 33(1):349-359 [G. Webster/G. Webster]