Homology of arthropod anterior appendages revealed by Hox gene expression in a sea spider

Muriel Jager, Jérôme Murienne, Céline Clabaut, Jean Deutsch, Hervé Le Guyader and Michaël Manuel ()
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Muriel Jager: Université Pierre et Marie Curie-Paris 6, UMR 7138 CNRS UPMC MNHN ENS IRD, Case 05
Jérôme Murienne: Université Pierre et Marie Curie-Paris 6, UMR 7138 CNRS UPMC MNHN ENS IRD, Case 05
Céline Clabaut: Université Pierre et Marie Curie-Paris 6, UMR 7138 CNRS UPMC MNHN ENS IRD, Case 05
Jean Deutsch: Université Pierre et Marie Curie-Paris 6, UMR 7622 CNRS UPMC
Hervé Le Guyader: Université Pierre et Marie Curie-Paris 6, UMR 7138 CNRS UPMC MNHN ENS IRD, Case 05
Michaël Manuel: Université Pierre et Marie Curie-Paris 6, UMR 7138 CNRS UPMC MNHN ENS IRD, Case 05

Nature, 2006, vol. 441, issue 7092, 506-508

Abstract: Talking heads The arthropods are a good example of how evolution shapes different body forms from a single ancestral species. They consist of a series of head and body segments, each with different appendages — claws, antennae, wings, legs. A recent Nature paper offered a new explanation of some apparent anomalies. The curious arthropods called sea spiders, it was suggested, have appendages on the first head segment, providing a link with the arthropod ancestor. That work was based on neuroanatomical observations, but now, using molecular techniques, Jager et al. show that sea spiders, like all other living arthropods, have lost the first head appendages seen in fossils.

Date: 2006
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DOI: 10.1038/nature04591

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