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. |
| E-mail: | derek.briggs (at) yale (dot) edu |
Contributions
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 DavidSection: 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. .
NEWS
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
CIRCULARS & DOCUMENTS
WHEN & WHERE
26th – 29th June: Field trip
1st – 4th July: Conference
5th – 9th July: Field trips
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
