System/
Period
Series/
Epoch
Stage/
Age
Age (Ma)
Carboniferous Mississippian Tournaisian younger
Devonian Upper/
Late
Famennian 358.9 372.2
Frasnian 372.2 382.7
Middle Givetian 382.7 387.7
Eifelian 387.7 393.3
Lower/
Early
Emsian 393.3 407.6
Pragian 407.6 410.8
Lochkovian 410.8 419.2
Silurian Pridoli no faunal stages defined older
Subdivision of the Devonian system
according to the ICS, as of 2017.[1]

The Lochkovian is one of three faunal stages in the Early Devonian epoch. It lasted from 419.2 ± 3.2 million years ago to 410.8 ± 2.8 million years ago. It marked the beginning of the Devonian Period, and was followed by the Pragian stage. It is named after the village of Lochkov in the Czech Republic, now a part of the city of Prague.[2]

In North America the Lochkovian Stage is represented by Gedinnian or Helderbergian time.

PalaeontologyEdit

AgnathansEdit

Agnathans of the Lochkovian
Taxa Presence Location Description Images
Lochkovian-Emsian Hunsrück Slate Formation, Germany, among others in Europe
Lochkovian-Emsian Wayne Hereford Quarry, England & Podolia, Ukraine
Lochkovian-Emsian Britain & Belgium

ReferencesEdit

  1. ^ http://www.stratigraphy.org/index.php/ics-chart-timescale
  2. ^ "Lochkovian Stage". Encyclopedia Britannica. Retrieved 2 October 2019.