Klobuck borehole 22, Czestochowa region, Slaskie (Jurassic of Poland)

Where: Poland (50.9° N, 18.9° E: paleocoordinates 42.1° N, 26.0° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Bathonian (168.3 - 166.1 Ma)

• The Klobuck borehole 22 reached silt and clay of the Bajocian and Bathonian. The author estimated the age of the gastropod-bearing samples as Bathonian on the basis of lithologic premises.

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; poorly lithified siltstone and poorly lithified claystone

• Most of the gastropods studied in this monograph come from clayey facies of more or less open sea environments (there is no detailed information for the distinct localities provided).

Size class: mesofossils

Preservation: original aragonite

Collection methods: sieve,

• Samples were received from B. Lacka (Institute of Geological Sciences, Warsaw).

Primary reference: A. Kaim. 2004. The evolution of conch ontogeny in Mesozoic open sea gastropods. Palaeontologia Polonica 62:1-183 [M. Aberhan/S. Nurnberg/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 67616: authorized by Martin Aberhan, entered by Sabine Nürnberg on 28.11.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• Focus on gastropods.
Gastropoda
 Cerithioidea - Cryptaulacidae
Cryptaulax quenstedti Walther 1951 snail
 Heterostropha - Mathildidae
"Promathildia concava" = Jurilda concava
"Promathildia concava" = Jurilda concava Walther 1951 snail