Halls Huk 3 (Silurian of Sweden)

Where: Sweden (57.9° N, 18.7° E: paleocoordinates 21.2° S, 2.9° W)

• coordinate based on nearby landmark

• hand sample-level geographic resolution

When: Kockelella ranuliformis conodont zone, Upper Visby Formation, Sheinwoodian (433.4 - 430.5 Ma)

• Lose specimen dated with carbon isotope stratigraphy.

•From reference: "On Gotland - but also on a global scale - the Llandovery–Wenlock boundary is characterised by a pronounced positive shift in d13Ccarb values (Samtleben et al. 1996), which can be correlated exactly with the conodont stra−

•tigraphy ... The mean d13C carb value of +4.18‰ indicates a stratigraphic posi−

•tion within the upper part of the Lower Kockelella ranuliformis Conodont Zone, i.e., in the upper part of the Upper Visby Formation"

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified reef rocks

Size class: macrofossils

Primary reference: L. Beuck, M. Wisshak, A. Munnecke and A. Freiwald. 2008. A giant boring in a Silurian stromatoporoid analysed by computer tomography. Acta Palaeontologica Polonica 53(1):149-160 [W. Kiessling/W. Kiessling]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 198679: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 05.01.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Demospongiae
 Clavulina - Clionaidae
Palaeosabella sp. Clarke 1921 demosponge
Stromatoporoidea
 Actinostromatida - Densastromatidae
Densastroma pexisum Yavorsky 1929 stromatoporoid sponge
 Ichnofossils -
Trypanites sp. Mägdefrau 1932
Osprioneides kampto n. gen. n. sp. Beuck et al. 2008