Halwaxiids and the Early Evolution of the Lophotrochozoans-Reference-Cited by-同舟云学术

Halwaxiids and the Early Evolution of the Lophotrochozoans

Published:2007-03-02 Issue:5816 Volume:315 Page:1255-1258
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Morris Simon Conway¹²,Caron Jean-Bernard¹²

Affiliation:

1. Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, UK.

2. Department of Natural History, Royal Ontario Museum, Toronto, M5S 2C6, Canada.

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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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