Tarantula Genome Sequenced for First Time, Revealing 6.5 Billion Base Pairs

A groundbreaking study published in Genome Biology & Evolution has revealed the first genome of a North American tarantula, shedding light on surprising aspects of spider evolution. The research, spearheaded by Dr. Ethan Briggs, a Chadwick Biodiversity Fellow at the Australian Museum, commenced at the University of Idaho with Associate Professor Chris Hamilton. This tarantula genome features 18 chromosomes and 6.5 billion base pairs—over twice the size of the human genome's 3.1 billion—making it one of the largest spider genomes documented. With nearly 80% consisting of repetitive sequences, it prompts inquiries into spider genome architecture. Despite the widespread presence of spiders, only around 180 genomes are accessible out of 54,000 recognized species. Professor Shane Ahyong, Chief Scientist at the Australian Museum Research Institute, described this research as essential for biodiversity science. Dr. Briggs is continuing his studies on arachnids at the Australian Museum, with support from the Chadwick Biodiversity Fellowship.