Apetasimus expers (Blackburn) Blackburn, 2006

Ewing, Curtis, 2006, Revision of the endemic Hawaiian sap beetle genus Apetasimus Sharp 1908 (Coleoptera: Nitidulidae), Zootaxa 1385, pp. 1-30 : 28

Apetasimus expers (Blackburn) comb. nov.

Brachypeplus expers Blackburn in Blackburn and Sharp, 1885: 136. Orthostolus expers: Scott in Sharp & Scott, 1908: 455.

Diagnosis

Apetasimus expers is known from a single specimen collected by Rev. Thomas Blackburn in 1883 on Maui. Considered a synonym of A. sordidus by Sharp (Sharp & Scott 1908). Examination of the type indicates affinity with Apetasimus subalatus as well as A. sordidus . All three species have the male anal sclerite sharply attenuate ( Fig. 7 F). Apetasimus expers is similar to A. subalatus in color and collection locality, and to A. sordidus in having fully developed flight wings. The type of A. expers is uniformly pale red, although not appearing teneral, while A. sordidus is dark brown to nearly black with small red markings at humeri ( Sharp & Scott 1908). Length 5.8mm, Width 2.9mm.

Lectotype ɗ, glued to card, underside labeled: " Br. expers " / " Type H.T." / "Hawaiian Is., Rev. T. Blackburn, 1883–30." [from original description: "A single specimen occurred under the bark of a tree on Haleakala, Maui, at an elevation of about 4000 feet " ( Blackburn 1885: 136)] (BMNH).

Figures

FIGURE 7. A. A. sordidus, pronotum (dorsal view); B. A. guttatus, prosternum (lateral view); C. A. guttatus, prosternum (ventral view); D. A. atratus, left elytron, dashed line indicates explanate margin; E. A. sordidus, left elytron, dashed line indicates explanate margin; F. A. sordidus, anal sclerite (ventral view); G. A. kauaiensis, apex of anal sclerite; H. Orthostolus nsp., metafemur (ventral view); I. A. guttatus, metafemur (ventral view); J. A. guttatus, labial palp (ventral view); K. Eupetinus impressus, labial palp (ventral view); L A. atratus, anal sclerite (ventral view).