Atrypina Community, Laketown Dolomite, Eastern Great Basin (Silurian to of the United States)

Where: Nevada (38.5° N, 115.0° W: paleocoordinates 9.8° S, 70.7° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Laketown Dolomite Formation, Llandovery to Llandovery (443.4 - 427.4 Ma)

• Late Llandovery (C6) to Early Wenlock. Jack Valley and Gettel Members of Laketown Dolomite.

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; bioturbated, argillaceous, silty dolomite

• "...deepest water facies of the Laketown Dolomite...probably in small basins on the carbonate platform. Sediments intensely bioturbated. Noevidence of wave activity. Storm scouring absent. Deposition below storm wave base. BA 4."

•2003:04:07 SEP Environmental calls based on given lithologic description and knowledge of regional strat.

• "The strata containing this community have the highest silt-clay content in the Laketown Dolomite, which is typically a very clean carbonate."

Collection methods: Combined are brachiopods of USGS localities 19185,19187,19189-91,19201-04,19206,19208-09, and 19211, and corals listed by Boucot. Sheehan (PBDB ref. 6949, table 10) gives abundances for brachiopods.

Primary reference: A. J. Boucot. 1999. Some Wenlockian-Geddinian, chiefly brachiopod dominated communities of North America. In A. J. Boucot, J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 549-591 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 24787: authorized by Michael Foote, entered by Michael Foote on 20.08.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Strophomenata
 Productida - Strophochonetidae
Protochonetes sp. Muir-Wood 1962
 Strophomenida -
Rhynchonellata
 Spiriferida - Cyrtiidae
Cyrtia sp. Dalman 1828
? Hedeina sp. Boucot 1957
 Spiriferida - Delthyrididae
Howellella sp. Kozlowski 1946
 Spiriferida - Reticulariidae
 Pentamerida - Camerellidae
"? Camarella sp." = Camerella
"? Camarella sp." = Camerella Billings 1859
 Pentamerida - Stricklandiidae
Microcardinalia sp. Boucot and Ehlers 1963
 Pentamerida - Pentameridae
Pentameroides sp. Schuchert and Cooper 1931
 Atrypida - Atrypidae
Plectatrypa cf. imbricata Sowerby and Murchison 1839
Atrypa sp. Dalman 1828
 Atrypida - Atrypinidae
 Rhynchonellida - Trigonirhynchiidae
Ancillotoechia sp. Havlicek 1959
sp. A
 Rhynchonellida - Rhynchonellidae
 Orthida -
Orthida indet. Schuchert and Cooper 1932
coarse-ribbed orthid
Orthida indet. Schuchert and Cooper 1932
fine-ribbed orthid
 Orthida - Rhipidomellidae
Dalejina sp. Havlicek 1953
 Orthida - Dicoelosiidae
Dicoelosia sp. King 1850
Dicoelosia biloba Linnaeus 1758
 Orthida - Dalmanellidae
Isorthis sp. Kozlowski 1929
 Orthida - Hesperorthidae
Dolerorthis flabellites Foerste 1889
genus name in quotes
Anthozoa
 Cystiphyllida - Tryplasmatidae
 Cystiphyllida - Goniophyllidae
 Cystiphyllida - Palaeocyclidae
? Rhabdocyclus sp. Lang and Smith 1939 horn coral
 Stauriida - Amplexidae
Amplexoides sp. Wang 1947 horn coral
 Stauriida - Streptelasmatidae
 Stauriida - Ptychophyllidae
? Ptychophyllum sp. Milne-Edwards and Haime 1850 horn coral