Euwallacea siporanus ( Hagedorn, 1910 )

Smith, Sarah M., Beaver, Roger A. & Cognato, Anthony I., 2020, Taxonomic Changes For Indo-Malayan Ambrosia Beetles (Coleoptera: Curculionidae: Scolytinae: Xyleborini), The Coleopterists Bulletin 74 (1), pp. 37-40 : 39

Euwallacea siporanus ( Hagedorn, 1910) , status restored

Xyleborus siporanus Hagedorn 1910: 11 .

Euwallacea siporanus (Hagedorn) : Wood 1989: 173.

Wood (1989) placed E. siporanus into synonymy with Euwallacea wallacei (Blandford, 1896) without comment. We examined the lectotype (in the National Museum of Natural History, Washington, DC), a specimen from the type locality ( Indonesia, Sumatra, Mentawei Island), and a specimen from East Malaysia (Sabah), and we compared them to specimens of E. wallacei that included the holotype (in Natural History Museum), and additional specimens from Papua New Guinea and Australia. Euwallacea siporanus differs from E. wallacei in the following diagnostic characters ( E. siporanus given first). Body larger, 5.5‒6.0 mm long vs. 5.2‒5.6 mm, and more elongate, 2.5‒2.6 times as long as wide vs. 2.4‒2.5 times. Elytra more elongate, 1.65 times as long as wide vs. 1.55 times. Ratio of elytral to pronotal length 1.8 vs. 1.6‒1.7. Eye of normal size with the lower part slightly larger than the upper vs. eye enlarged with upper part larger than lower and extending onto the frons. Pronotal disc with fine punctures, distinctly concentrically arranged vs. disc with some coarser punctures, not distinctly concentric.Elytra dull, opalescent over entire surface vs. elytra shiny. Protibia with 6‒7 socketed denticles vs. 5 denticles. Therefore, E. siporanus is

here removed from synonymy with E. wallacei . Euwallacea siporanus is known from Indonesia (Sumatra) and Malaysia (Sabah); E. wallacei appears to be confined to New Guinea and Australia (Queensland).