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A Spider Named for Stephen Colbert Has a Genome About 50% Larger than Ours

Summary by Phys.org
Many spiders reach their maximum size about this time of year, having spent the summer eating, which helps explain their starring role in Halloween decorations. Researchers at the University of California, Davis, have found that one particular trapdoor spider, Aptostichus stephencolberti, which is about the size of a quarter, is big in another way: It has an outsized genome.

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A species of burrowing spider, no larger than a quarter coin, has been found to possess a genome approximately 50% larger than that of a human. This finding was published in the international journal *Journal of Heredity* by researchers at the University of California, Davis (UC Davis). According to the researchers, the spider's genome measures 4.6 billion base pairs (4.6 gigabases). This marks the first time the genome of a spider belonging to…

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Phys.org broke the news in Douglas, United Kingdom on Wednesday, October 28, 2026.
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