PBDB Collection

Alan Mountain upper member (upper part), Alan Mountain Limestone (Carboniferous of the United States)

Where: Montana (47.4° N, 105.6° W: paleocoordinates 5.8° S, 39.8° W)

• coordinate based on political unit

• basin-level geographic resolution

When: upper Member (Alan Mountain Limestone Formation), Osagean (352.0 - 343.0 Ma)

• "Mississippian, Osage?", upper part horizon

• group of beds-level stratigraphic resolution

Environment/lithology: marine; cherty/siliceous limestone

• "thick bedded ls and dolomitic ls; finely xtalline; irreg. bedding; chert. BA4"

Size class: macrofossils

Primary reference: M. R. Mudge, W. J. Sando, and J. T. Dutro, Jr. 1962. Mississippian Rocks of Sun River Canyon Area, Sawtooth Range, Montana. AAPG Bulletin 46(11):2003-2018 [M. Uhen/J. Ju/J. Ju]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 555: authorized by Jack Sepkoski, entered by Mike Sommers on 14.01.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Mudge et al. 1962"

Show authors, comments, and common names

Anthozoa
Stauriida - Hapsiphyllidae	Zaphrentites sp. Zaphrentites sp. Hudson 1941 horn coral
Stauriida - Zaphrentoididae	Homalophyllites sp. Homalophyllites sp. Easton 1944 horn coral
Stauriida - Aulophyllidae	Rylstonia sp. Rylstonia sp. Hudson and Platt 1927 horn coral
Stauriida - Cyathaxoniidae	Cyathaxonia sp. Cyathaxonia sp. Michelin 1847 horn coral
Stauriida - Uraliniidae	Vesiculophyllum sp., Enygmophyllum sp. Vesiculophyllum sp. Easton 1944 horn coral Enygmophyllum sp. Fomichev 1931 horn coral
Auloporida - Syringoporidae	Syringopora sp. Syringopora sp. Goldfuss 1826 tabulate coral
Ostracoda
Podocopida - Bairdiidae	Bairdia sp. Bairdia sp. M'Coy 1844 ostracod originally entered as "Biardia sp."
Gastropoda
Euomphalina - Euomphalidae	Straparollus sp. Straparollus sp. de Montfort 1810 snail (Euomphalus)
Streptoneura -	Archaeogastropoda indet. Archaeogastropoda indet. Thiele 1925 snail high spired gastropod, not Loxonema
Strophomenata
Orthotetida - Schuchertellidae	? Schuchertella sp. ? Schuchertella sp. Girty 1904 originally entered as "? Schuchertella sp."
Productida - Productidae	Buxtonia sp., Dictyoclostus sp. Buxtonia sp. Dictyoclostus sp. Muir-Wood 1930 2 species
Strophomenida -	Strophomenida indet. Strophomenida indet. Opik 1934 orthotetid brachiopod
Strophomenida - Rafinesquinidae	Leptaena sp. Leptaena sp. Dalman 1828
Rhynchonellata
Spiriferida - Spiriferidae	Spirifer sp. Spirifer sp. Sowerby 1818 3 species
Spiriferida - Brachythyrididae	Brachythyris sp. Brachythyris sp. M'Coy 1844
Spiriferida - Elythidae	? Torynifer sp. ? Torynifer sp. originally entered as "? Torynifer sp."
Spiriferinida - Dimegelasmidae	Dimegelasma sp. Dimegelasma sp. Cooper 1942
Spiriferinida - Syringothyrididae	? Syringothyris sp. ? Syringothyris sp. originally entered as "? Syringothyris sp."
Spiriferinida - Punctospiriferidae	? Punctospirifer sp. ? Punctospirifer sp. North 1920 originally entered as "? Punctospirifer sp."
Rhynchonellida - Trigonirhynchiidae	? Rhynchotreta sp. ? Rhynchotreta sp. Hall 1879 originally entered as "? Rhynchotreta sp."
Athyridida - Athyrididae	Composita sp., Cleiothyridina sp. Composita sp. Brown 1849 Cleiothyridina sp. Buckman 1906
Stenolaemata
Cryptostomata - Fenestellidae	Fenestella sp. Fenestella sp. Lonsdale 1839