Notes on the classification of North American ant-like stone beetles (Coleoptera: Scydmaenidae)

The following changes in North American scydmaenid taxonomy are proposed:1) Taphroscydmus Casey is elevated to generic rank, 2) Papusus Casey is removed from synonymy with Leptochromus Motschulsky, 3) Ascydmus Casey and Euthiodes Brendel are placed as junior synonyms of Euthiconus Reitter and a lectotype specimen is designated for Ascydmus tener Casey, 4) Neladius Casey is removed from synonymy with Delius Casey and placed as a subgenus of Microscydmus Saulcy and Croissandeau, and Microscydmus caseyi O'Keefe is proposed as a replacement name for M. atomus (Casey), a junior homonym of M. atomus (Reitter), 5) Smicrophus Casey is placed as a subgenus of Euconnus, S. leviceps Casey is designated as the type species for Smicrophus, and a lectotype specimen is designated for S. leviceps, 6) Noctophus Casey and 7) Drastophus Casey are removed from synonymy with Euconnus Thomson and placed as subgenera of Euconnus, 8) Xestophus Casey is removed from synonymy with Psomophus Casey and placed as a subgenus of Euconnus. In addition, new combinations are listed due to the elevation of Cheloniodum Strand, Brachycepsis Brendel, and Parascydmus Casey to generic rank, the placement of Acholerops Casey as a junior synonym of Scydmaenus Latreille, and the placement of Opresus Casey as a junior synonym of Microscydmus. Connophron Casey is considered a junior synonym of Napochus Thomson.