Alexander Petrunkevitch; Trigonotarbus arnoldi, a new species of fossil arachnid from southern France. Journal of Paleontology ; 29 (3): 475–477. doi:
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Describes Trigonotarbus arnoldi n.sp. from the Carboniferous of the Decazeville area, south France, and emends the definition of the genus, formerly represented by the single species T. johnsoni.
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