Dlouha hora near Beroun (Silurian of Czech Republic)

Where: Czech Republic (50.0° N, 12.9° E: paleocoordinates 51.6° S, 55.8° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Kopanina Formation, Ludfordian (425.6 - 423.0 Ma)

• Ananaspis fecunda horizon. Correlation of fecundus level with upper Ludfordian based on Havlicek and Storch (1999 in Boucot and Lawson).

• formation-level stratigraphic resolution

Environment/lithology: marine; shelly/skeletal grainstone and argillaceous limestone

• "Decrease in volcanic activity...provided favorable conditions for carbonate sedimentation and the development of fauna on the NW flank of the 'syncline' whereas calc. shale sed. dominated by graptolites continued along the SE limb...The high dominance, low diversity atrypid and athyrid lenses may represent BA 2, quiet water, restrictive conditions...[various aspects of shell preservation discussed, as well as shell accumulation indicating rough water in places...] Prevalence of small, smooth brachiopods and numerous trilobites is consistent with BA 3-4 position that graded laterally in calc. shales dom. by graptolites..."
• "The sequence of calcareous shales, commonly with tuffaceous intercalations, occupying the lowermost part of the Kopanina Formation, is overlain by bioclastic limestones of the E. beaumonti Horizon of the lower Kopanina Formation..." "...biosparitic limestone and laminated, argillaceous limestones..."

Size class: macrofossils

Collection methods: Trilobites based in part on Chlupac (1987) (ref. 6191) (his Encrinuraspis-Eophacops and Encrinuraspis-Metacalymene-Prantlia assemblages). Relative abundances of brachiopods given by the authors.

Primary reference: M. Šnajdr. 1980. Bohemian Silurian and Devonian Proetidae (Trilobita). Rozpravy Ústøedního Ústavu Geologického 45:1-324 [P. Wagner/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 230813: authorized by Pete Wagner, entered by Pete Wagner on 21.07.2023

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Proetida - Proetidae
"Proetus ryckholtii n. sp." = Coniproetus ryckholti
"Proetus ryckholtii n. sp." = Coniproetus ryckholti Barrande 1846 trilobite