Arthropod Segmentation: Why Centipedes Are Odd
نویسنده
چکیده
Recent work has revealed a double segmental periodicity of gene expression in the centipede, a potential molecular explanation for the observation that this arthropod always has an odd number of trunk segments. Is this an oddity of centipedes, or might it mean that double segmental pair-rule patterning dates back to the Ur-arthropod?
منابع مشابه
A Double Segment Periodicity Underlies Segment Generation in Centipede Development
The number of leg-bearing segments in centipedes varies extensively, between 15 and 191, and yet it is always odd. This suggests that segment generation in centipedes involves a stage with double segment periodicity and that evolutionary variation in segment number reflects the generation of these double segmental units. However, previous studies have revealed no trace of this. Here we report t...
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Saltational changes in segment numbers have likely occurred in arthropod evolution, especially if mechanisms of segment formation involve a multiplicative phase, as recently suggested in the evo-devo literature. Here we provide for the first time evidence of major phenotypic saltation in the evolution of segment number in a lineage of centipedes, with a newly discovered species of scolopender h...
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عنوان ژورنال:
- Current Biology
دوره 14 شماره
صفحات -
تاریخ انتشار 2004