Arthropods & Trilobites Meeting - Congress - Symposium
Prague, Czech Republic, and Sardinia, Italy
Summer 2012

TRILO 2012 Conference
The 5th Conference on Trilobites and their relatives, 1st July – 4th July 2012, Prague, Czech Republic

Richard Alan Fortey

Name:Prof. Richard Alan Fortey
Country:United Kingdom
Institution:Natural History Museum, London
Address:R. Fortey
Dept Palaeontology
The Natural History Museum
Cromwell Road
London SW7 5BD
United Kingdom



The early Ordovician trilobites of the Kirtonryggen Formation, Spitsbergen

Richard A Fortey and David L. Bruton
Section: Biostratigraphy and palaeography, Presentation: Oral
Kirtonryggen Formation, Spitsbergen
More than thirty years after the description of the diverse trilobites of the Valhallfonna Formation the fauna of the underlying Kirtonryggen Formation has at last been investigated. This formation spans the Tremadocian to early Floian (Ibexian) stages, and has five successive and different trilobite faunas. All lived in inshore, carbonate habitats, and all were typically palaeotropical Laurentian trilobites, dominated by the bathyurid biofacies. 52 species have been identified, although we are obliged to keep many under open nomenclature because of shortage of material. The Spitsbergen section is important for 'stacking' several faunas that have otherwise been described from scattered Ordovican localities in Greenland, Newfoundland and elsewhere. For the most part, they include species close to other faunas from eastern Laurentia and are less similar to those from the Great Basin, an area that provides the Ibexian standard. The earliest fauna is Stairsian in age, with hystricurids and leiostegiids dominant. Two relatively sparse Tulean faunas follow, including equivalents of the classical "Jeffersonian" faunas. The following fauna with Petigurus groenlandicus was described as long ago as 1937 by Christian Poulsen in eastern Greenland, but we can now place it below a rich fauna with Petigurus nero that has been found widely to the south in Greenland, Newfoundland and eastern USA. This includes the faunas originally described by Elkanah Billings in 1865. Individual species like P. nero and Punka flabelliformis are widely distributed providing a reliable species-level biostratigraphy. An interesting aspect of the Kirtonryggen faunas is the occurrence of the earliest known proetid, illaenid, and styginid trilobites, all destined to radiate into many habitats. This provides support for Jablonski's hypothesis that major clades tend to start in inshore environments. .


NEW PHOTOS: Participant's photos
Participant's photos

NEW PHOTOS: Sessions and dinner
Photos from sessions and the conference dinner

NEW PHOTOS: Mid-conference trip
Photos from Mid-conference field trip

NEW PHOTOS: Pre-conference trip and Icebreaker party
Photos from Pre-conference field trip and the Icebreaker party


26th – 29th June: Field trip
Lower Palaeozoic of the Barrandian area, Czech Rep.

1st – 4th July: Conference
Geoscience Building of the Faculty of Science of Charles University, Albertov 6, Praha 2, Prague, Czech Republic (maps)

5th – 9th July: Field trips
Sardinian Lower Palaeozoic, Italy and Late Palaeozoic in Moravia, Czech Republic


Oldřich Fatka
Charles University
Prague, Czech Republic

Petr Budil
Czech geological Survey
Prague, Czech Republic

Contact e-mail:
conf (at) trilo2012 (dot) org

Sponsors and organisers of the 5th International Trilobite Conference

5th International conference on Trilobites and their relatives TRILO2012, July 2012, Prag, Czech Republic | Webdesign Pavel Bokr | Logotype Radko Šarič | Ilustrations Iva Vyhnánková | savana