Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

A reconstruction of an evolutionary scenario for the Brachyura (Decapoda) in the Context of the Cretaceous-Tertiary boundary

A reconstruction of an evolutionary scenario for the Brachyura (Decapoda) in the Context of the... A RECONSTRUCTION OF AN EVOLUTIONARY SCENARIO FOR THE BRACHYURA (DECAPODA) IN THE CONTEXT OF THE CRETACEOUS-TERTIARY BOUNDARY BY ANDREAS BRÖSING 1,2 ) 1 ) Humboldt-Universität zu Berlin, Institut für Biologie/Vergleichende Zoologie, Philippstr. 13, D-10115 Berlin, Germany ABSTRACT In this article, I map the currently known brachyuran fossil record on a recent cladogram of Brachyura, the true crabs. The hypothesis of brachyuran phylogenetic relationships is based on a cladistic analysis of brachyuran foregut characters. With this approach, the following scenario of the evolution of Brachyura is proposed. The representatives of Brachyura that occur earliest in the fossil record (Dromioidea) take the most basal position in the cladogram, followed by Homolidae. These taxa reach their highest species diversity during the Cretaceous, together with Raninidae and Cymonomidae sensu lato. The analysis reveals that the majority of the “higher” crabs (Xanthoidea, Portunidae, Cancridae, and Oxystomata sensu lato) as well as their common ancestor existed already by the end of the Cretaceous. In particular, a constant increase of brachyuran species diversity has been registered from the Eocene to the Miocene. Most taxa of the Brachyura (with the exception of the Carcineretidae) remained unaffected by the events at the Cretaceous-Tertiary-boundary. Hence, the data suggest the http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Crustaceana Brill

A reconstruction of an evolutionary scenario for the Brachyura (Decapoda) in the Context of the Cretaceous-Tertiary boundary

Brösing, Andreas
Crustaceana , Volume 81 (3): 17 – Jan 1, 2008
Download PDF
17 pages

Loading next page...
 
/lp/brill/a-reconstruction-of-an-evolutionary-scenario-for-the-brachyura-I0FL0R8SKX

References (79)

Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0011-216X
eISSN
1568-5403
DOI
10.1163/156854008783564091
Publisher site
See Article on Publisher Site

Abstract

A RECONSTRUCTION OF AN EVOLUTIONARY SCENARIO FOR THE BRACHYURA (DECAPODA) IN THE CONTEXT OF THE CRETACEOUS-TERTIARY BOUNDARY BY ANDREAS BRÖSING 1,2 ) 1 ) Humboldt-Universität zu Berlin, Institut für Biologie/Vergleichende Zoologie, Philippstr. 13, D-10115 Berlin, Germany ABSTRACT In this article, I map the currently known brachyuran fossil record on a recent cladogram of Brachyura, the true crabs. The hypothesis of brachyuran phylogenetic relationships is based on a cladistic analysis of brachyuran foregut characters. With this approach, the following scenario of the evolution of Brachyura is proposed. The representatives of Brachyura that occur earliest in the fossil record (Dromioidea) take the most basal position in the cladogram, followed by Homolidae. These taxa reach their highest species diversity during the Cretaceous, together with Raninidae and Cymonomidae sensu lato. The analysis reveals that the majority of the “higher” crabs (Xanthoidea, Portunidae, Cancridae, and Oxystomata sensu lato) as well as their common ancestor existed already by the end of the Cretaceous. In particular, a constant increase of brachyuran species diversity has been registered from the Eocene to the Miocene. Most taxa of the Brachyura (with the exception of the Carcineretidae) remained unaffected by the events at the Cretaceous-Tertiary-boundary. Hence, the data suggest the

Journal

Crustaceana – Brill

Published: Jan 1, 2008

There are no references for this article.