USNM9272, Block 2, Ko Muk Island northwest: Roadian, Thailand

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Craniata - Craniida - Craniidae
Nematocrania crassa Grant 1976
11 specimens
Rhynchonellata - Rhynchonellida - Pontisiidae
Pontisia exoria Grant 1976
1 specimen
Rhynchonellata - Spiriferida - Elythidae
Anomaloria glomerosa Grant 1976
1 specimen
Rhynchonellata - Spiriferida - Ambocoeliidae
Cruricella couria Grant 1976
11 specimens
Rhynchonellata - Spiriferida - Spiriferellidae
Tipispirifer oppilatus Grant 1976
12 specimens
Rhynchonellata - Athyridida - Athyrididae
Cleiothyridina tribulosa Grant 1976
5 specimens
Composita advena Grant 1976
4 specimens
recombined as Posicomta advena
Rhynchonellata - Athyridida - Neoretziidae
Hustedia ratburiensis Waterhouse and Piyasin 1970
80 specimens
(10 measurements)
Hustedia funaria Grant 1976
21 specimens
Rhynchonellata - Spiriferinida - Spiriferellinidae
Spiriferellina yanagidai Grant 1976
3 specimens
Rhynchonellata - Spiriferinida - Paraspiriferinidae
Callispirina austrina Grant 1976
14 specimens
Paraspiriferina gentilis Grant 1976
5 specimens
Rhynchonellata - Terebratulida - Gillediidae
Hemiptychina murrita Grant 1976
15 specimens
Strophomenata - Strophomenida - Anopliidae
Tornquistia tropicalis Grant 1976
13 specimens
recombined as Neotornquistia tropicalis
Chonetina sp. Krotow 1888
5 specimens
    = Costachonetina krotowi Waterhouse 1981
Waterhouse 1981
Strophomenata - Strophomenida - Rugosochonetidae
Chonetinella cymatilis Grant 1976
30 specimens
recombined as Neochonetes (Sommeriella) cymatilis
Rugaria molengraaffi (Broili 1916)
50 specimens
Strophomenata - Productida - Rigbyellidae
Paralyttonia tenax Grant 1976
95 specimens
Strophomenata - Productida - Lyttoniidae
? Adriana sp. de Gregorio 1930
1 specimen
Strophomenata - Productida - Paucispiniferidae
Retimarginifera celeteria Grant 1976
62 specimens
Strophomenata - Productida
Incisius cornuta
11 specimens
Strophomenata - Productida - Productellidae
Comuquia modesta Grant 1976
115 specimens
Stictozoster leptus Grant 1976
21 specimens
Dyschrestia spodia Grant 1976
4 specimens
Kutorginella aprica Grant 1976
16 specimens
recombined as Pitakpaivania aprica
(4 measurements)
Bibatiola costata Grant 1976
175 specimens
Strophomenata - Productida - Linoproductidae
Linoproductus sp. (Chao 1927)
1 specimen
Strophomenata - Productida - Aulostegidae
Urushtenia arguta Grant 1976
83 specimens
Strophomenata - Productida - Strophalosiidae
Heteralosia haerens Grant 1976
30 specimens
Strophomenata - Orthotetida - Schuchertellidae
Streptorhynchus sulculatum Grant 1976
45 specimens
Strophomenata - Orthotetida - Meekellidae
Perigeyerella tricosa Grant 1976
60 specimens
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:small collection
Time
Period:Permian Epoch:Guadalupian
Stage:Roadian 10 m.y. bin:Permian 3
Key time interval:Roadian
Age range of interval:273.01000 - 266.90000 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: lithified argillaceous "limestone"
Includes fossils?Y
Lithology description: Ligher colour than Ko Muk NE, contains little to no sand and less mud.
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.
Metadata
Database number:40897
Authorizer:D. Bottjer, M. Clapham Enterer:M. Clapham
Modifier:M. Clapham Research group:marine invertebrate
Created:2004-07-02 13:39:30 Last modified:2011-05-14 15:26:09
Access level:the public Released:2004-07-02 13:39:30
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:

27444 J. B. Waterhouse. 1981. Early Permian brachiopods from Ko Yao Noi and near Krabi, southern Thailand. The Permian Stratigraphy and Palaeontology of Southern Thailand. Geological Survey of Thailand Memoir 4(2):45-213 [M. Clapham/M. Clapham]