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

Derek E.G. Briggs

Name:Prof. Derek E.G. Briggs
Country:United States
Institution:Yale University
Address:Derek E.G. Briggs
Department of Geology and Geophysics
Kline Geology Laboratory
P.O. Box 208109
New Haven
Connecticut 06520-8109, U.S.A.



The evolution of limbs in Paleozoic horseshoe crabs revealed by an exceptionally preserved Silurian fossil

Derek E. G. Briggs, Derek J. Siveter, David J. Siveter, Mark D. Sutton, Russell J. Garwood and David
Section: Non-trilobite arthropods, Presentation: Oral
horseshoe crab, limb evolution, Silurian
A remarkable new horseshoe crab from the the mid-Silurian of Herefordshire (~425 Myr) preserves biramous limbs in the prosoma that can be homologized with those of living Limulus. The fossil shows that a true biramous limb evolved in chelicerates as well as in crustaceans, in contrast to the endopod with exite present in trilobites. The evidence of the new fossil supports models for the origin of the limb morphology of living horseshoe crabs through loss of gene expression. .


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