Pachybrachis viduatus (Fabricius, 1801)

Barney, Robert J., 2019, Key to All Sixty-Four Species of Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae) in the Eastern USA, The Coleopterists Bulletin 73 (1), pp. 85-96 : 95-96

62. Pachybrachis viduatus (Fabricius, 1801)

( Neotype in MSUC) .

Riley and Barney 2015: figs. 18, 22; map 3.

Remarks. Riley and Barney (2015) designated a neotype for P. viduatus when no type material could be found. However, a subsequent

loan request to NHMD for specimens of P. luridus in the Fabricius material (Barney 2017) resulted in the serendipitous discovery of a specimen of P. viduatus . The specimen is in poor shape, having been pinned through the rear half of the right elytron and subsequently missing the pygidium and legs; therefore, no definitive determination was made as to type status of this specimen.

Two female specimens recently discovered in BMNH are labeled “E. Coll. / Chev. t // ???? // 3 // 6756 [hand-inked, tan paper] // viduatus ???? / Say Suffr ??? / bivittatus ??? / ???? / Carolina [handinked, green paper] // m-nigrum / (see G. Horn) [hand-inked, tan paper]” and “Named / by Suffr / Coll. / Deyrolle // Pachybrachys / viduatus / Fabr / N. America [hand-inked, tan paper].” These specimens appear to be P. viduatus and possible lectotypes, but designation was not made without confirmation via dissection of a male ( Riley and Barney 2015).