Leangella Community of the Waldron Shale in Lauderdale County, Alabama (Silurian of the United States)

Where: Alabama (35.0° N, 88.0° W: paleocoordinates 30.0° S, 56.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Waldron Shale Formation, Wenlock (433.4 - 427.4 Ma)

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal; calcareous shale

• Shells articulated; no fine laminae, crossbeds, or prominent ripples; geographic and stratigraphic relations with other communities suggest BA 4; quieter than average.
• "fine-grained, calcareous shale"

Reposited in the USNM

• Abundances stated in text. Crinoid calyces mentioned but no taxa listed.

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 24868: authorized by Michael Foote, entered by Michael Foote on 21.08.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
Strophomenata
 Orthotetida - Triplesiidae
Triplesia sp. Hall 1859
 Strophomenida - Leptestiidae
Leangella sp. Opik 1933
Rhynchonellata
 Spiriferida - Reticulariidae
Reticularia sp. Frederiks 1915
genus name in quotes
 Spiriferida - Cyrtiidae
Hedeina sp. Boucot 1957
 Athyridida - Meristellidae
? Meristina sp. Hall 1867
 Athyridida - Rhynchospirinidae
? Rhynchospirina sp. Schuchert and LeVene 1929
 Atrypida - Atrypinidae
Atrypina sp. Hall and Clarke 1893
 Atrypida - Atrypidae
Atrypa sp. Dalman 1828
 Orthida - Dicoelosiidae
Dicoelosia sp. King 1850
 Orthida - Rhipidomellidae
Dalejina sp. Havlicek 1953
 Orthida - Dalmanellidae
Isorthis sp. Kozlowski 1929
 Orthida - Hesperorthidae
Ptychopleurella sp. Schuchert and Cooper 1931