Norderon, Jamtland (Silurian of Sweden)

Where: Sweden (63.4° N, 12.9° E: paleocoordinates 21.0° S, 8.6° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Ede Quartzite Formation, Llandovery (443.4 - 433.4 Ma)

• "The assemblage is adequate to indicate that the Ede Quartzite at this locality is of Early Llandovery age."

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified, calcareous sandstone

• Fauna preserved as internal and external molds. "Quartzite" is cemented by calcite.

Collection methods: bulk, chemical, mechanical,

• "Preparation was accomplished by means of a rock splitter combined with mild acid treatment, the latter exposing the internal structures of the shell adequately. The leached specimens must be hardened with a plastic dissolved in a solvent."

Primary reference: A. J. Boucot and J. G. Johnson. 1964. Brachiopods of the Ede Quartzite (Lower Llandovery) of Norderon, Jamtland. Bulletin of the Geological Institution of the University of Upsala 42(9):1-11 [J. Alroy/M. Sommers/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 3347: authorized by John Alroy, entered by Mike Sommers on 30.07.1999, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

• Brachiopods only.
 Strophomenida - Leptostrophiidae
Eostropheodonta sp. Bancroft 1949
 Orthotetida - Chilidiopsidae
? Fardenia sp. Lamont 1935
originally entered as "? Fardenia sp."
 Orthida - Dalmanellidae
"Isorthis (Protocortezorthis) prima" = Levenea llandoveriana
"Isorthis (Protocortezorthis) prima" = Levenea llandoveriana Williams 1951
originally entered as "Dalmanella aff. testudinaria"
 Atrypida -
Protatrypa thorslundi Boucot and Johnson 1964
n. sp.
 Pentamerida - Virgianidae
Virgianidae indet. Boucot and Amsden 1963
excluded from Virgiana and Platymerella by lack of low plications, from Holorhynchus by lack of median septum in pedicle valve.
 Athyridida - Meristellidae
"? Cryptothyrella sp." = Hindella
"? Cryptothyrella sp." = Hindella Davidson 1882
originally entered as "? Cryptothyrella sp."