Where: Gotland, Sweden (57.5° N, 18.6° E: paleocoordinates 24.1° S, 3.1° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Pterospathodus amorphognathoides conodont zone, A Member (Lower Visby Formation), Telychian (438.5 - 433.4 Ma)

• Based on Laufeld (1974) Sveriges Geologiska Undersokning Ser C 705:1 - 172 and Jeppson et al. (1994) Geological Magazine 131: 201 - 218; Manten, A. A. 1971. Silurian reefs of Gotland. Elsevier, Amsterdam.

• member-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; poorly lithified, gray, blue marl and limestone

Size class: macrofossils

Preservation: replaced with silica

Collection methods: bulk,

• Visby A denotes several localities around Visby: "The two lower units are fairly uniform, both lithologically and faunally, along hte whole outcrop belt." (Jaanusson 1986).

•Updated by Wagner (1992 pers. obs. while at the Riksmuseet, Stockholm) - includes types and subsequent stratigraphic collections.

Primary reference: G. Lindström. 1884. The Silurian Gastropoda and Pteropoda of Gotland. Kongliga Svenska Vetenskaps-Akademiens Handlingasr 19:1-250 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 3972: authorized by Pete Wagner, entered by Pete Wagner on 12.08.1999, edited by Björn Kröger

Creative Commons license: CC BY (attribution)