Articulate Brachiopods, St. Clair Limestone, Searcy County, Arkansas: Wenlock, Arkansas

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata - Spiriferida - Delthyrididae
Howellella splendens
Rhynchonellata - Spiriferida - Cyrtiidae
Eospirifer acutolineatus
Plicocyrtia arkansana
Rhynchonellata - Athyridida - Nucleospiridae
Nucleospira raritas
Rhynchonellata - Athyridida - Meristellidae
Meristina clairensis
Rhynchonellata - Athyridida - Meristidae
Dicamaropsis parva
Rhynchonellata - Atrypida - Atrypinidae
Atrypina erugata Amsden 1968
Rhynchonellata - Atrypida - Atrypidae
Plectatrypa arctoimbricata
Atrypa sp. Dalman 1828
Rhynchonellata - Atrypida - Lissatrypidae
Nanospira clairensis
synonym of Lissatrypa
Rhynchonellata - Orthida - Dalmanellidae
Resserella sp. Bancroft 1928
Rhynchonellata - Orthida - Orthidae
Orthostrophella clairensis
(16 measurements)
Rhynchonellata - Orthida - Hesperorthidae
"Dolerorthis" nanella
Rhynchonellata - Pentamerida - Clorindidae
Antirhynchonella thomasi
Boucotides barrandei
Rhynchonellata - Pentamerida - Parastrophinidae
Parastrophinella lepida
Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
Virginiata arkansana
Ancillotoechia marginata
Strophomenata - Strophomenida - Sowerbyellidae
? Plectodonta sp. Kozlowski 1929
Strophomenata - Strophomenida - Leptestiidae
Leangella (Opikella) dissiticostella
Strophomenata - Strophomenida - Strophodontidae
Lissostrophia sp.
Strophomenata - Strophomenida - Shaleriidae
Shaleria informal sp. B Caster 1939
Strophomenata - Strophomenida - Rafinesquinidae
Leptaena sp. Dalman 1828
Strophomenata - Strophomenida
"Cymostrophia" (? Idioglyptus) sp. (Northrop 1939)
original and current combination Idioglyptus
Strophomenata - Orthotetida - Triplesiidae
Streptis glomerata
Brachymimulus americanus
Oxoplecia infrequens
see common names

Geography
Country:United States State/province:Arkansas County:Searcy
Coordinates: 35.3° North, 91.7° West (view map)
Paleocoordinates:27.8° South, 58.9° West
Basis of coordinate:based on political unit
Geographic resolution:local area
Time
Period:Silurian Epoch:Wenlock
10 m.y. bin:Silurian 2
Key time interval:Wenlock
Age range of interval:433.40000 - 427.40000 m.y. ago
Stratigraphy
Formation:St. Clair Limestone
Stratigraphic resolution:formation
Lithology and environment
Primary lithology:shelly/skeletal,gray,red or brown grainstone
Secondary lithology:gray lime mudstone
Includes fossils?Y
Includes fossils?Y
Lithology description: "light gray to pinkish gray, evenly bedded limestone...Basically it is a bioclastic limestone composed in large part of fossil debris cemented with spar or lime mud. The texture ranges from that of a biosparite to that of a biomicrite, and in some beds the two types are intimately associated. Brachiopods are common in both...facies. Most, if not all, of the rock is grain supported, ranging from a grainstone to a packstone..."
Environment:deep subtidal ramp Tectonic setting:cratonic basin
Geology comments: SEP environmental call based on scanty given info see 26022
Taphonomy
Collection methods and comments
Collection excludes:some macrofossils
Reason for describing collection:taxonomic analysis
Collection method comments: Text-fig. 7. Localities S1-S9 combined.
Taxonomic list comments:Articulate brachiopods only. Mollusks, ostracodes, trilobites and other taxa also present.
Metadata
Database number:26023
Authorizer:M. Foote Enterer:M. Foote
Modifier:M. Foote Research group:marine invertebrate
Created:2002-10-01 07:25:52 Last modified:2006-09-15 15:15:11
Access level:the public Released:2002-10-01 07:25:52
Creative Commons license:CC BY
Reference information

Primary reference:
7210. T. W. Amsden. 1968. Articulate brachiopods of the St. Clair Limestone (Silurian), Arkansas and the Clarita Formation (Silurian), Oklahoma. Paleontological Society Memoir 1:1-117 [M. Foote/M. Foote/M. Foote]