Hydrochus pertuberculatus Perkins 2020a: 297 Taxonomy of Central American water beetles in the genus Hydrochus Leach, 1817 (Coleoptera: Hydrochidae) Perkins, Philip D. Zootaxa 2021 2021-05-21 4974 3 459 503   Hydrochus pertuberculatus  Perkins 2020a: 297   8Y4R3 Perkins Perkins [151,586,402,429] Insecta Hydrochidae Hydrochus Animalia Coleoptera 19 478 Arthropoda species pertuberculatus   Figs. 1, 35      Hydrochus pertuberculatus Perkins 2020a: 297.   Originallydescribed from Guatemala. Followingare new locality data records for Guatemalaand Mexico. Imagesof the habitus and male genitalia of the holotype, and detailed description of the male genitalia are given in Perkins (2020a).   Material examined (10):   Guatemala: Peten, Parque National El Rosario, E of Sayaxche, ( 16°31’26.9’’N, 90°9’36.32’’W),  2-3.x.2013, leg. R. S. Zack(1 WSU).   Mexico: Cotaxtla, Cotaxtla Exp. Sta.,  1.vii.1962, leg. D. H. Janzen(1 NMNH);  Chiapas, 5 Mi. S. Las Cruces,  23.viii.1965, leg. Paul J. Spangler(3 NMNH);  Veracruz,  20 mi.NW Rt.144 Huatusco,  28.vi.1963, leg. Robt. E. Woodruff(4 NMNH);  Cordoba, 19 mi.NE,  1.vii.1952, leg. collector unknown (1 SEMC).   Differential diagnosis.Among Central American species, recognized by the combination of moderately large size (ca. 3.56 mm), the moderately low and relatively impunctate pronotal reliefs, the large tubercle of the 5 thinterstria, and the male genitalia. This species has a generalized  Hydrochushabitus; reliable determinations will require dissection of males. The male genitalia are superficially somewhat similar to that of  H. nayaritensis  n. sp., in being slender and having a very narrow aedeagus; however, the parameres, especially the sagittate tips, the basal piece shape, and the adbl shape and size are very different in  H. pertuberculatus. 3128194318 Guatemala Images Originally Following 19 478 1 holotype 3128194364 2013-10-02 2013-10-03 2013-10-02 WSU R. S. Zack Guatemala 16.52414 Parque National El Rosario 1 -90.16009 19 478 1 Peten 3128194538 1962-07-01 NMNH D. H. Janzen Mexico Cotaxtla Exp. Sta. Cotaxtla 19 478 1 3128194347 [376,1239,757,784] 1965-08-23 NMNH Mi. S. Las Cruces & Paul J. Spangler Mexico Chiapas 19 478 1 Chiapas 3128194576 1963-06-28 NMNH Robt. E. Woodruff Mexico Huatusco 19 478 1 Veracruz de Ignacio de la Llave 3128194435 1952-07-01 SEMC Mexico Cordoba 19 478 1