Halwaxiids and the early evolution of the lophotrochozoans |
| |
Authors: | Morris Simon Conway Caron Jean-Bernard |
| |
Affiliation: | Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, UK. sc113@esc.cam.ac.uk |
| |
Abstract: | Halkieriids and wiwaxiids are cosmopolitan sclerite-bearing metazoans from the Lower and Middle Cambrian. Although they have similar scleritomes, their phylogenetic position is contested. A new scleritomous fossil from the Burgess Shale has the prominent anterior shell of the halkieriids but also bears wiwaxiid-like sclerites. This new fossil defines the monophyletic halwaxiids and indicates that they have a key place in early lophotrochozoan history. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|