Gnaszyn Section A, sample Gns4 (Jurassic of Poland)

Where: Poland (50.8° N, 19.0° E: paleocoordinates 42.1° N, 26.1° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Bremeri ammonoid zone, Middle Bathonian (167.7 - 164.7 Ma)

• Bullatimorphis subzone

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; poorly lithified, black claystone

• deep-water and soft-bottom environments

Size classes: macrofossils, mesofossils, microfossils

Collection methods: sieve,

• The samples (approx. 5kg each) were taken from each lithologically distinct horizon of the succession. They were washed with hot water and washing powder on a sieve (mesh size 0.375 mm) and fossils were picked from residues under the microscope

Primary reference: A. Kaim. 2012. Faunal dynamics of Gastropods in the Bathoninan (Middle Jurrasic) ore-bearing clays at Gnaszyn, Krakow-Silesia Homocline, Poland. Acta Palaeontologica Polonica 62(3):367-380 [M. Aberhan/T. Schossleitner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 141275: authorized by Martin Aberhan, entered by Thomas Schossleitner on 23.03.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

• Numbers of specimen of gastropodes, bivalves, scaphopodes and shark teeth are explicitely stated, number of echinoderms is roughly based on proportional plots; total number of echinoderms within this collection is 347 specimen.
Bivalvia
 Nuculanida - Nuculanidae
Nuculanidae indet.2 Adams and Adams 1858 pointed nut clam
 Pholadida - Corbulidae
Corbulidae indet.2 Lamarck 1818 clam
Scaphopoda
 Dentaliida - Laevidentaliidae
cf. Laevidentalium sp.2 Cossmann 1888 tusk shell
Gastropoda
 Heterostropha - Tubiferidae
 Heterostropha - Mathildidae
Mathildidae indet. Dall 1889 snail
 Sorbeoconcha - Iravadiidae
Bralitzia sp. GrĂ¼ndel 1998 snail
 Sorbeoconcha - Aporrhaidae
Aporrhaidae indet. Gray 1850 snail
 Sorbeoconcha - Newtoniellidae
Cosmocerithium sp. Cossmann 1906 snail
 Cerithioidea - Cryptaulacidae
Crinoidea
  -
Crinoidea indet.1 Miller 1821 Sea lily
Holothuroidea
 Apodida - Achistridae
Achistrum sp.1 Etheridge 1881 sea cucumber
 Dendrochirotida - Calclamnidae
Eocaudina sp.1 Martin 1952 sea cucumber
Calclamna sp.1 Frizzell and Exline 1955 sea cucumber
  - Priscopedatidae
Priscopedatus sp.1 Schlumberger 1890 sea cucumber
Echinoidea
  -
Echinoidea indet.1 Leske 1778 sea urchin
Ophiuroidea
  -
Ophiuroidea indet.1 Gray 1840 brittle star
Asteroidea
  -
Asteroidea indet.1 de Blainville 1830 sea star