Gnaszyn Section B, sample Gns23 (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 141304: 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 135 specimen.
Bivalvia
 Myalinida - Kolymiidae
"Parainoceramus sp." = Kolymia2
"Parainoceramus sp." = Kolymia2 clam
 Pectinida - Oxytomidae
Oxytomidae indet.2 Ichikawa 1958 scallop
 Protobranchia - Nuculanidae
Nuculanidae indet.2 Adams and Adams 1858 pointed nut clam
Ophiuroidea
  -
Ophiuroidea indet.1 Gray 1840 brittle star
Asteroidea
  -
Asteroidea indet.1 de Blainville 1830 sea star
Crinoidea
  -
Crinoidea indet.1 Miller 1821 Sea lily