This is the second of a two-part series of monographs on spiders (and arachnids more generally) involving Dr David Penney (the first is Fossil Spiders: The evolutionary history of a mega-diverse order – Monograph Series Vol 1). This one is written with Jason Dunlop, who has described numerous new fossil species in a variety of arachnid groups, from scorpions to harvestmen, to mites and even some extinct groups.
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