Zone V2b, Ny Friesland ( of Norway)

Where: Spitsbergen, Norway (79.8° N, 17.8° E: paleocoordinates 79.8° N, 17.8° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Pseudocybele nasuta trilobite zone, Olenidsletta Member (Valhallfonna Formation), Ibexian (487.5 - 470.0 Ma)

• While collections were made throughout section, only ranges of trilobite species are reported. Zone V2b comprises meters 100-106 of the Olenidsletta Member. Correlates with part of "zone J" of Ross 1951, Hintze 1951, 1952.

• group of beds-level stratigraphic resolution

Environment/lithology: slope; lithified limestone

• Transitional underlying gray and black flat bedded limestones and overlying black finely laminated bituminous limestones and shales. See also Fortey 1974

Size class: macrofossils

Collected by R. A. Fortey in 1967

Primary reference: R. A. Fortey. 1980. The Ordovician trilobites of Spitsbergen. III. Remaining trilobites of the Valhallfonna Formation. Norsk Polarinstitutt Skrifter 171:1-163 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 106475: authorized by Melanie Hopkins, entered by Melanie Hopkins on 18.03.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

• Graptolites also present (see Fortey and Brunton 1973)
Show authors, comments, and common names
Artiopoda
 Agnostida - Agnostidae
Micragnostus serus
Micragnostus serus Fortey 1980
 Agnostida - Metagnostidae
Arthrorhachis danica
Arthrorhachis danica Poulsen 1965
subspecies brevis
Trilobita
 Phacopida - Pliomeridae
Strotactinus "sp. A"
Strotactinus "sp. A" Bradley 1925 trilobite
 Olenida - Olenidae
Svalbardites hebaxis, Bienvillia stikta, Hypermecaspis latigena, Cloacaspis ekphymosa
Svalbardites hebaxis Fortey 1974 trilobite
Bienvillia stikta Fortey 1974 trilobite
Hypermecaspis latigena Fortey 1974 trilobite
Cloacaspis ekphymosa Fortey 1974 trilobite
 Proetida - Telephinidae
Carolinites genacinaca, Opipeuter sp.
Carolinites genacinaca Ross 1951 trilobite
subspecies genacinaca
Opipeuter sp. Fortey 1974 trilobite
 Asaphida - Nileidae
Symphysurus arcticus
Symphysurus arcticus Fortey 1975 trilobite
 Asaphida - Asaphidae
Presbynileus (Protopresbynileus) glaber, Niobe occulta, Ptyocephalus cf. vigilans
Niobe occulta Fortey 1975 trilobite
Ptyocephalus cf. vigilans Whittington 1948 trilobite
 Asaphida - Remopleurididae
? Lacorsalina bellatula
? Lacorsalina bellatula Fortey 1980 trilobite
 Trinucleida - Raphiophoridae
Ampyx delicatulus, Pytine graia
Ampyx delicatulus Fortey 1975 trilobite
Pytine graia Fortey 1975 trilobite
 Trinucleida - Alsataspididae
Falanaspis extensa
Falanaspis extensa Fortey 1975 trilobite