Lygistopterus Mulsant, 1838: 79

Lygistopterus Mulsant, 1838: 79 View in CoL .

Type species: Lygistopterus sanguineus Linnaeus, 1758 (by monotypy).

Adoceta Bourgeois, 1882: 97 View in CoL , syn. nov.

Type species: Adoceta caroli Bourgeois, 1882 (by monotypy).

Differential diagnosis: Lygistopterus is widely distributed and differs from the Old World genera Micronychus and Parantis gen. nov. in the membranous internal sac ( Fig. 5I, J View Figure 5 ) and from Calochromus by the presence of sharp pronotal lateral edges. This genus occurs sympatrically with Lucaina and Caloptognatha in the Nearctic region and differs in the absence of long erected setae in the elytra. Neotropical Macrolygistopterus differs in the shape of male genitalia ( Fig. 5N View Figure 5 ). The length of the rostrum is variable in Lygistopterus ; for example, Lygistopterus sanguineus has a well-developed rostrum, but the rostrum is absent in the closely related East Palearctic species or extremely short in the North African species.

Distribution: Palearctic, Nearctic, Oriental regions.

Remarks: Adoceta Bourgeois, 1882 is proposed as a junior synonym of Lygistopterus as A. caroli (type species) has a membranous internal sac and cannot be distinguished from Lygistopterus . All sequenced species from sub-Saharan Africa represent a distant clade. They have a sclerotized internal sac and form a subclade within Micronychus . Two North African species are placed in Lygistopterus and the Neotropical species of Lygistopterus Kleine, 1933 are transferred to Macrolygistopterus as earlier proposed by Pic (1929). See Appendix for details.