Where: Rapla, Estonia (59.1° N, 25.1° E: paleocoordinates 26.6° S, 0.8° W)
• coordinate stated in text
• small collection-level geographic resolution
When: Spinachitina taugourdeaui other zone, Siuge Member (Ärina Formation), Porkuni (445.6 - 443.7 Ma)
• The Porkuni Regional Stage is formerly known as the "Borkholm'sche Schicht" (Raukas & Teedumäe [eds.] 1997, Geology and Mineral Resources of Estonia, html version, http://sarv.gi.ee/geology)
Environment/lithology: perireef or subreef; lithified, shelly/skeletal lime mudstone and nodular, shelly/skeletal chert
•"inter-reef facies" (Raukas & Teedumäe [eds.] 1997, Geology and Mineral Resources of Estonia, html version, http://sarv.gi.ee/geology);
•A more datailed description of environment and setting is given in Kröger (2007).
Size class: macrofossils
Preservation: cast, recrystallized, replaced with silica
Collected by M. Isakar, B. Kröger, among others in 2000, 2004, and earlier; reposited in the MfN
• TUG = Tartu Ülikool Geoloogiamuuseum, Tartu, Estonia
•NMB = Museum für Naturkunde Berlin
•
•The materials "have been collected since the nineteenth century by Wilhelm Dames, Walther Rosenberg (at reposition of NMB), Arwed von Wahl (in collection of GIT), Karl Orviku, and Ülle Sirk. However, the bulk of the material was collected by Mare Isakar (Tartu) and Björn Kröger (stored in the collection of TUG) during two field trips in 2002 and 2004." (Kröger, 2007)
Primary reference: E. Koken and J. Perner. 1925. Die Gastropoden des baltischen Untersilurs 1-324 [P. Wagner/P. Wagner/P. Wagner]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 172805: authorized by Pete Wagner, entered by Pete Wagner on 24.08.2015
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
"Euomphalus dimidiatus n. sp." = Trochomphalus dimidiatus
"Euomphalus dimidiatus n. sp." = Trochomphalus dimidiatus Koken 1896 snail | |
Ectomaria nieszkowskii Schmidt 1858 snail |