USNM720f, Hess Ranch Horst, Glass Mountains (Permian of the United States)

Where: Brewster County, Texas (30.4° N, 103.2° W: paleocoordinates 0.8° S, 34.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Skinner Ranch Formation, Artinskian (290.1 - 279.3 Ma)

• Lower Skinner Ranch Fm.

• group of beds-level stratigraphic resolution

Environment/lithology: slope; lithified limestone

• Skinner Ranch Fm. is slope to basinal equivalent of platformal Hess Formation.

Size class: macrofossils

Preservation: replaced with silica

Reposited in the USNM

Collection methods: bulk, chemical,

Primary reference: G. A. Cooper and R. E. Grant. 1972. Permian brachiopods of west Texas, I. Smithsonian Contributions to Paleobiology 14:1-231 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 75935: authorized by Wolfgang Kiessling, entered by Uta Merkel on 06.11.2007, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

• A variety of papers list the brachiopods, nearly all gastropods, most bivalves (except primarily Paleotaxodonts), trilobites, chitons, siliceous sponges, rugose corals (only from Gaptank and Asselian/Sakmarian formations).
Show authors, comments, and common names
Anthozoa
 Stauriida - Diffingiidae
Turgidiffia composita n. gen.2, Diffingia divisa2, Diffingia largifica2
Turgidiffia composita n. gen.2 Fedorowski 1985 horn coral
Diffingia divisa2 Fedorowski 1985 horn coral
Diffingia largifica2 Fedorowski 1985 horn coral
 Stauriida - Lophotichiidae
Paraduplophyllum (Vacoea) vermiculare3, Assimulia (Assimulia) abscessa3, Assimulia (Assimulia) tergida3
Paraduplophyllum (Vacoea) vermiculare3 Fedorowski 1987 horn coral
Assimulia (Assimulia) abscessa3 Fedorowski 1987 horn coral
Assimulia (Assimulia) tergida3 Ross and Ross 1962 horn coral
Strophomenata
 Orthotetida - Meekellidae
Meekella hessensis1
Meekella hessensis1 King 1931
 Orthotetida - Derbyiidae
Derbyia crenulata1
Derbyia crenulata1 Girty 1908
 Productida - Aulostegidae
Glyptosteges intricatus1, Chonosteges variabilis1
Glyptosteges intricatus1 Cooper and Grant 1975
Chonosteges variabilis1 Cooper and Grant 1975
 Productida - Cyclacanthariidae
Acritosia peculiaris1
Acritosia peculiaris1 Cooper and Grant 1975
 Productida - Lyttoniidae
Eolyttonia sp.1
Eolyttonia sp.1 Frederiks 1924
Rhynchonellata
 Rhynchonellida - Stenoscismatidae
Stenoscisma hadrum1
Stenoscisma hadrum1 Cooper and Grant 1976
 Rhynchonellida - Pontisiidae
Pontisia costata1
Pontisia costata1 Cooper and Grant 1976
 Spiriferinida - Reticulariinidae
Reticulariina pusilla1
Reticulariina pusilla1 Cooper and Grant 1976
 Athyridida - Neoretziidae
Hustedia hessensis1, Hustedia catella1
Hustedia hessensis1 King 1931
Hustedia catella1 Cooper and Grant 1976
 Orthida - Rhipidomellidae
Rhipidomella hessensis1
 Orthida - Enteletidae
Enteletes stehlii1
Enteletes stehlii1 Cooper and Grant 1976
Cephalopoda
 Goniatitida - Perrinitidae
Perrinites sp.1
Perrinites sp.1 Böse 1919 ammonite
 Prolecanitida - Medlicottiidae
Bamyaniceras knighti1
Bamyaniceras knighti1 Miller and Furnish 1940 ammonite
1Cooper and Grant 1977; 2Fedorowski 1985; 3Fedorowski 1987