Where: Gotland, Sweden (57.2° N, 18.4° E: paleocoordinates 16.8° S, 2.3° W)

• coordinate based on unpublished field data

• outcrop-level geographic resolution

When: Polygnathoides siluricus conodont zone, När Formation (Hemse Group), Ludfordian (425.6 - 423.0 Ma)

• Hemse Beds, Hemse Marl SE part. Conodonts agree well with the P. siluricus Zone, although the collection is too small to yield P. siluricus.

• formation-level stratigraphic resolution

Environment/lithology: lithified marl

Size class: microfossils

Preservation: original phosphate

Collection methods: acetic, sieve

Primary reference: L. Jeppsson. 2005. Conodont-based revisions of the Late Ludfordian on Gotland, Sweden. Gff 127(4):273-282 [E. Jarochowska/E. Jarochowska]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 184338: authorized by Emilia Jarochowska, entered by Emilia Jarochowska on 21.02.2017

Creative Commons license: CC BY (attribution)