Porkuni, Borkholm Lst., undifferentiated (Ordovician of Estonia)

Where: Estonia (59.0° N, 25.0° E: paleocoordinates 26.7° S, 0.8° W)

• local area-level geographic resolution

When: Arina Formation, Porkuni (445.6 - 443.7 Ma)

Environment/lithology: shallow subtidal; lithified limestone

Size classes: macrofossils, mesofossils

Primary reference: R. S. Bassler. 1911. The early Paleozoic Bryozoa of the Baltic Provinces. Bulletin of the United States National Museum 77:1-375 [B. Kröger/B. Kröger]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 167591: authorized by Björn Kröger, entered by Björn Kröger on 25.03.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

• Bryozoan systematics
Bivalvia
 Cardiida - Glauconomidae
Glauconome plumula Wiman 1902 clam
Stenolaemata
 Cryptostomata - Rhinoporidae
 Cryptostomata - Rhinidictyidae
 Cryptostomata - Ptilodictyidae
Ptilodictya gladiola Billings 1866
 Cryptostomata - Fenestellidae
Fenestella striolata Eichwald 1860
 Cryptostomata - Arthrostylidae
Glauconome strigosa Billings 1886
Sceptropora facula Ulrich 1888
Nematopora lineata Billings 1866
  - Phylloporinidae
Chasmatopora tenella Eichwald 1855
 Trepostomata - Halloporidae
 Cyclostomata - Corynotrypidae