Where: Gotland, Sweden (57.3° N, 18.1° E: paleocoordinates 21.3° S, 2.8° W)

• coordinate stated in text

When: K. ortus absidata conodont zone, Djupvik Member (Halla Formation), Silurian (443.8 - 419.2 Ma)

Environment/lithology: limestone and marl

Size class: macrofossils

Preservation: original calcite, replaced with calcite

Collection methods: hydrochloric

• All specimens were photographed, some of them having been whitened with sublimated ammonium chloride (NH4Cl). Two thin sections were prepared from the specimen from Sudervik-2 (longitudinal and transverse section; embedded in limestone), one from a specimen from Djupvik-1 (longitudinal section, embedded in marl), one from a specimen from V€ars€andeojk (longitudinal section, embedded in limestone). The sample from Sudervik-2 was also prepared for SEM study. It was glued to an aluminium stub, ground with corundum powder (800), and etched with 0.1N hydrochloric acid for 30 s. A longitudinal thin section was prepared from a Spyroceras specimen embedded in limestone

Primary reference: K. de Baets and A. Munnecke. 2018. Evidence for Palaeozoic orthoconic cephalopods with bimineralic shells. Palaeontology 61(2):173-181 [B. Seuss/B. Seuss/B. Seuss]more details

Purpose of describing collection: taphonomic analysis

PaleoDB collection 210179: authorized by Barbara Seuss, entered by Barbara Seuss on 26.05.2020

Creative Commons license: CC BY (attribution)