Shell Oil Co. Pine Field Nos. 1 and 43-22A, Deadwood Fm., Arenig, zones f and g, (Ordovician of the United States)

Where: Montana (47.2° N, 110.2° W: paleocoordinates 7.4° S, 75.6° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Hintzeia celsaora trilobite zone, Deadwood Formation, Tulean (485.4 - 471.8 Ma)

• "L. Ord.. upper Arenig"

•Zone G

• group of beds-level stratigraphic resolution

Environment/lithology: lagoonal; limestone

• "sh, ls and congl., some ss. shelf lagoon, near shoreface. BA2. Cratonic shelf"

Size class: macrofossils

Primary reference: 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]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 287: authorized by Jack Sepkoski, entered by Mike Sommers on 21.03.1999, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Lochman-Balk and Wilson 1967. biostrat. lists"
Trilobita
 Corynexochida - Leiostegiidae
Lloydia sp., Reubenella rex n. gen. n. sp.
Lloydia sp. Vogdes 1893 trilobite
Reubenella rex n. gen. n. sp. Lochman 1966 trilobite
 Aulacopleurida - Hystricuridae
Psalikilus paraspinosum Hintze 1952 trilobite
Hystricurus "sp. A" Raymond 1913 trilobite
 Phacopida - Pliomeridae
Protopliomerops sp. Kobayashi 1934 trilobite
 Proetida - Bathyuridae
Peltabellia willistoni n. sp. trilobite
Lichnocephala "sp. A" Ross 1951 trilobite
originally entered as "Lidnocephala sp."
 Asaphida - Asaphidae
Megistaspis sp. Jaanusson 1956 trilobite
Megalaspidella sp. Kobayashi 1937 trilobite
Ogyginus sp. Raymond 1912 trilobite
Kayseraspis sp. Harrington 1938 trilobite
Asaphellus sp. Callaway 1877 trilobite
Presbynileus sp. Hintze 1954 trilobite
9478'-9481'
"Ptychocephalus montanensis n. sp." = Ptyocephalus trilobite
originally entered as "Ptyclocephalus sp."
 Asaphida - Remopleurididae
Apatokephalus sp. Brögger 1896 trilobite
9478'-9481'
Xiphosura
  -
"Merostomata indet." = Xiphosura
"Merostomata indet." = Xiphosura Latreille 1802
Strophomenata
 Strophomenida - Taffiidae
Leptella sp. Hall and Clarke 1892
Rhynchonellata
 Pentamerida - Tetralobulidae
Tetralobula sp. Ulrich and Cooper 1936
 Pentamerida - Clarkellidae
 Orthida - Plectorthidae
Nanorthis sp. Ulrich and Cooper 1936
Lingulata
 Lingulida - Obolidae
Lingulella sp. Salter 1866
Gastropoda
 Euomphalina - Holopeidae
Raphistomina sp. Ulrich and Scofield 1897 snail
 Euomphalina - Macluritidae
"Lecanospira (Barnesella) aff. affinis" = Teiichispira affinis
"Lecanospira (Barnesella) aff. affinis" = Teiichispira affinis Billings 1865 snail
 Eogastropoda - Sinuopeidae
Schizopea sp., "Rhombella cf. umbilicata" = Euconia umbilicata
Schizopea sp. Butts 1926 snail
9484' - 9487'
"Rhombella cf. umbilicata" = Euconia umbilicata Dake and Bridge 1932 snail
9475' - 9478'
 Murchisoniina - Hormotomidae
Hormotoma sp. Salter 1859 snail
originally entered as "? Murchisonia sp."
Plethospira sp. Ulrich and Scofield 1897 snail
9475' - 9478'
Conodonta
 Conodontophorida -
Drepanodus sp. Pander 1856 conodont
9475'-9478'
Graptolithina
  -
 Dendroidea -
? Bryograptus sp. graptolite
originally entered as "? Bryograptus sp."
Eocrinoidea
  -
Eocrinoidea indet. Jaekel 1918
Hexactinellida
  -
Hexactinellida indet. Schmidt 1870 glass sponge