Abstract. The eleven species of Lathrobium subgenus Tetartopeus from the Nearctic Region are revised. Thirteen specific names are placed in synonymy, Lconvolutum sp.n. is described, and Deratopeus Casey is synonymized with Tetartopeus. A cladistic analysis suggests that Tetartopeus is monophyletic, and that five monophyletic species‐groups are represented in the Nearctic Region.
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