Williston Basin, Deadwood Fm., Arenig, zone e (Ordovician of the United States)

Where: Montana (47.4° N, 105.6° W: paleocoordinates 10.4° S, 71.9° W)

• coordinate based on political unit

When: Deadwood Formation, Arenig (478.6 - 466.0 Ma)

• "lower ord., middle? Arenig"

Environment/lithology: lagoonal; lithology not reported

• "sh, ls, and congl. muddy shelf lagoon (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 286: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Lochman-Balk and Wilson 1967. biostrat. lists."
Show authors, comments, and common names
unclassified
  -
Dentinella sp.
Scyphozoa
 Conulariida - Conulariidae
Conularia sp.
Conularia sp. jellyfish
Conodonta
 Protopanderodontida - Protopanderodontidae
Drepanodus sp., Scolopodus sp.
Drepanodus sp. Pander 1856 conodont
Scolopodus sp. conodont
 Prioniodontida - Distomodontidae
Distomodus sp.
Distomodus sp. Branson and Branson 1947 conodont
originally entered as "Distocodus sp."
Pterobranchia
 Dendroidea - Dendrograptidae
Dendrograptus sp., Ptilograptus sp.
Dendrograptus sp. Hall 1858 graptolite
Ptilograptus sp. graptolite
 Dendroidea - Acanthograptidae
Dictyonema sp., Callograptus sp.
Dictyonema sp. Hall 1851 graptolite
Callograptus sp. graptolite
 Graptoloidea - Dichograptidae
Clonograptus sp.
Clonograptus sp. Nicholson 1873 graptolite
 Graptoloidea - Mastigograptidae
Mastigograptus sp.
Mastigograptus sp. Ruedemann 1908 graptolite
Eocrinoidea
  -
Eocrinoidea indet.
Eocrinoidea indet. Jaekel 1918
Rhynchonellata
 Orthida - Plectorthidae
Nanorthis sp.
Nanorthis sp. Ulrich and Cooper 1936
 Pentamerida - Clarkellidae
Syntrophina sp., Diaphelasma sp.
Lingulata
 Acrotretida - Acrotretidae
Acrotreta sp.
Acrotreta sp. Kutorga 1848
 Lingulida - Obolidae
Lingulella sp.
Lingulella sp. Salter 1866
Gastropoda
 Bellerophontida - Tropidodiscidae
Tropidodiscus sp.
Tropidodiscus sp. Meek and Worthen 1866 snail
 Bellerophontida - Bucanellidae
Bucanella sp.
Bucanella sp. Meek 1871 snail
 Euomphalina - Macluritidae
Macluritella sp.
Macluritella sp. Kirk 1927 snail
originally entered as "Lyrtospira sp."
 Euomphalina - Ophiletidae
Lecanospira sp.
Lecanospira sp. Butts 1926 snail
 Euomphalina - Raphistomatidae
Ceratopea sp.
Ceratopea sp. Ulrich 1911 snail
originally Raphistomina
 Eogastropoda - Sinuopeidae
Schizopea sp., "Euconia sp." = Euconia, "Rhombella sp." = Euconia
Schizopea sp. Butts 1926 snail
"Euconia sp." = Euconia Ulrich and Scofield 1897 snail
"Rhombella sp." = Euconia Ulrich and Scofield 1897 snail
 Murchisoniina - Hormotomidae
Hormotoma sp.
Hormotoma sp. Salter 1859 snail
originally Murchisonia
Trilobita
 Asaphida -
Asaphida indet.
Asaphida indet. Salter 1864 trilobite
  -
"Pseudoclelanida sp." = Pseudoclelandia
"Pseudoclelanida sp." = Pseudoclelandia Ross 1951 trilobite
originally entered as "Pseudoclelandia sp."
 Corynexochida - Leiostegiidae
Lloydia sp.
Lloydia sp. Vogdes 1893 trilobite
 Proetida - Hystricuridae
Hystricurus sp.
Hystricurus sp. Raymond 1913 trilobite