Shell Oil Co. Pine Field Nos. 1 and 43-22A, Deadwood Fm., Arenig, zones f and g,: Tulean, Montana

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Eocrinoidea
Eocrinoidea indet. Jaekel 1918
Pterobranchia
Graptolithina indet. Bronn 1849
Pterobranchia - Graptoloidea - Anisograptidae
? Bryograptus sp.
originally entered as "? Bryograptus sp."
Conodonta - Protopanderodontida - Protopanderodontidae
Drepanodus sp. Pander 1856
9475'-9478'
Lingulata - Lingulida - Obolidae
Lingulella sp. Salter 1866
Strophomenata - Strophomenida - Taffiidae
Leptella sp. Hall and Clarke 1892
Rhynchonellata - Pentamerida - Tetralobulidae
Tetralobula sp. Ulrich and Cooper 1936
Rhynchonellata - Pentamerida - Clarkellidae
Syntrophina sp.
Rhynchonellata - Orthida - Plectorthidae
Nanorthis sp. Ulrich and Cooper 1936
Gastropoda - Murchisoniina - Hormotomidae
Hormotoma sp. (Salter 1859)
originally entered as "? Murchisonia sp."
Plethospira sp. Ulrich and Scofield 1897
9475' - 9478'
Gastropoda - Sinuopeidae
Rhombella sp. Bridge and Cloud 1947
9475' - 9478'
    = Rhombella cf. umbilicata Dake and Bridge 1932
Lochman 1966
recombined as Euconia umbilicata
Schizopea sp. Butts 1926
9484' - 9487'
Gastropoda - Euomphalina - Macluritidae
Lecanospira sp. Butts 1926
    = Lecanospira (Barnesella) aff. affinis Billings 1865
Lochman 1966
recombined as Teiichispira affinis
9475' - 9478' and 9481'-9484'
Gastropoda - Euomphalina - Holopeidae
Raphistomina sp. Ulrich and Scofield 1897
Xiphosura
Merostomata indet. Dana 1852
synonym of Xiphosura
Trilobita - Corynexochida - Leiostegiidae
Reubenella sp. Lochmann 1966
    = Reubenella rex n. gen., n. sp. Lochman 1966
Lochman 1966
9472'-9475'
Lloydia sp. Vogdes 1893
Trilobita - Proetida - Hystricuridae
Psalikilus sp. Ross 1951
    = Psalikilus paraspinosum Hintze 1953
Lochman 1966
9478'-9481'
Hystricurus sp. Raymond 1913
    = Hystricurus informal sp. A Raymond 1913
Lochman 1966
9478'-9481'
Trilobita - Proetida - Bathyuridae
Peltabellia sp. Whittington 1953
    = Peltabellia willistoni n. sp.
Lochman 1966
9475'-9478'
Lichnocephala sp. (Ross 1951)
originally entered as "Lidnocephala sp."
    = Lichnocephala informal sp. A Ross 1951
Lochman 1966
original and current combination Licnocephala
9478'-9481' (spelled "Licnocephala)
Trilobita - Phacopida - Pliomeridae
Protopliomerops sp. Kobayashi 1934
Trilobita - Asaphida - Asaphidae
Aulacoparina sp. (Hintze and Jaanusson 1956)
    = Aulacoparia (Aulacoparina) impressa n. sp.
Lochman 1966
9472'-9475', 9490-9493'
Kayseraspis sp. Harrington 1938
Ogyginus sp. Raymond 1912
Ptychocephalus sp. Agassiz 1843
originally entered as "Ptyclocephalus sp."
    = Ptychocephalus montanensis n. sp.
Lochman 1966
corrected as Ptyocephalus
9472'-9475', 9478'-9481'
Megistaspis sp. Jaanusson 1956
Presbynileus sp. Hintze 1954
9478'-9481'
Asaphellus sp. Callaway 1877
Megalaspidella sp. Kobayashi 1937
synonym of Asaphellus
Trilobita - Asaphida - Remopleurididae
Apatokephalus sp. Brögger 1896
9478'-9481'
Hexactinellida
Hexactinellida indet. Schmidt 1870
see common names

Geography
Country:United States State/province:Montana
Coordinates: 47.2° North, 110.2° West (view map)
Paleocoordinates:7.4° South, 75.6° West
Basis of coordinate:based on political unit
Geographic resolution:basin
Time
Period:Ordovician Epoch:Early/Lower Ordovician
10 m.y. bin:Ordovician 1-2
*Period:Early/Lower Ordovician *Epoch:Late/Upper Arenig
Key time interval:Tulean Trilobite zone: Hintzeia celsaora
Age range of interval:480.30000 - 473.90000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Deadwood
Local section:43-22A Local bed:9400-9500 ft
Local order:top to bottom
Stratigraphic resolution:group of beds
Stratigraphy comments: "L. Ord.. upper Arenig" Zone G
Lithology and environment
Primary lithology: "limestone"
Environment:lagoonal Tectonic setting:passive margin
Geology comments: "sh, ls and congl., some ss. shelf lagoon, near shoreface. BA2. Cratonic shelf"
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Taxonomic list comments:"Lochman-Balk and Wilson 1967. biostrat. lists"
Metadata
Database number:287
Authorizer:J. Sepkoski, P. Wagner Enterer:M. Sommers, P. Wagner
Modifier:P. Wagner Research group:marine invertebrate
Created:1999-03-21 18:01:49 Last modified:2020-06-17 14:20:38
Access level:the public Released:1999-03-21 18:01:49
Creative Commons license:CC BY
Reference information

Primary reference:
60989. C. Lochman-Balk and J. L. Wilson. 1967. Stratigraphy of Upper Cambrian-Lower Ordovician Subsurface Sequence in Williston Basin. AAPG Bulletin 51(6):883-917 [M. Uhen/J. Ju]

Secondary references:

13452 C. Lochman. 1966. Lower Ordovician (Arenig) faunas from the Williston Basin, Montana and North Dakota. Journal of Paleontology 40(3):512-548 [P. Wagner/P. Wagner/P. Wagner]