New species and new records of Xyleborini from the Oriental region, Japan and Papua New Guinea (Coleoptera: Curculionidae: Scolytinae) Author Smith, Sarah M. 0000-0002-5173-3736 Department of Entomology, Michigan State University, 288 Farm Lane, East Lansing, Michigan 48824, USA. smith 462 @ msu. edu; https: // orcid. org / 0000 - 0002 - 5173 - 3736 smith462@msu.edu Author Beaver, Roger A. 161 / 2 Mu 5, Soi Wat Pranon, T. Donkaew, A. Maerim, Chiangmai 50180, Thailand. Author Pham, Thai Hong Mientrung Institute for Scientific Research (MISR), Vietnam National Museum of Nature, Vietnam Academy of Science and Technology (VAST), 321 Huynh Thuc Khang St, Hue, Vietnam. & Graduate School of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam Department of Entomology, Michigan State University, 288 Farm Lane, 243 Natural Science Bldg., East Lansing, MI 48824, USA. cognato @ msu. edu; https: // orcid. org / 0000 - 0001 - 6436 - 2447 Author Cognato, Anthony I. 0000-0001-6436-2447 cognato@msu.edu text Zootaxa 2022 2022-11-15 5209 1 1 33 journal article 188516 10.11646/zootaxa.5209.1.1 51b10d7e-0ef3-496e-9ec5-d4bcd31e9f91 1175-5326 7322341 78B932B7-0194-4DEA-A4FA-40A457ACA662 Euwallacea alastos Smith, Beaver & Cognato sp. nov. ( Figs 49–52 ) http://zoobank.org/ urn:lsid:zoobank.org:act: 5090DCC4-5358-461E-9DCD-59F2D7B1A55D Type material. Holotype , female: JAPAN , G. Lewis , NHMUK014591822 (NHMUK). Diagnosis. This species is distinguished by its stout form; declivital posterolateral margin costate and granulate; pronotum appearing subquadrate when viewed dorsally ( type 3); protibiae outer margins obliquely triangular bearing five short obtuse denticles; declivital strial punctures approximately the same size on disc and declivity; declivity gradually rounded; and declivital surface opalescent. This species is very similar to E. praevius ( Blandford, 1894 ) and can be distinguished by the following combination of characters ( E. alastos given first): stouter form, 2.56 vs 2.72–2.92 × as long as wide; stout elytra 1.44 vs 1.6–1.83 × as long as wide; declivital surface opalescent vs strongly shining; declivital interstriae minutely granulate vs distinctly denticulate. Similar species. E. praevius , E. andamanensis ( Blandford, 1896 ) , Xyleborus aquilus Blandford, 1894 Description (female). 3.2 mm long (n = 1); 2.56 × as long as wide. Body ferruginous. Legs and antennae light brown. Head: epistoma entire, transverse, with a row of hair-like setae. Frons flattened to upper level of eyes; surface alutaceous sparsely, finely punctate, setose; punctures each a long, erect hair-like seta. Eyes deeply emarginate just above antennal insertion, upper part smaller than lower part. Antennal scape long and slender, longer than club. Pedicel as wide as scape, shorter than funicle. Funicle 4-segmented, segment 1 longer than pedicel. Club approximately circular, flat, type 3; segment 1 corneous, transverse on anterior face, occupying basal ~1/3; segment 2 narrow, soft; segments 1‒3 present on posterior face. Pronotum 1.12 × as long as wide. In dorsal view subquadrate with prominent anterolateral corners, type 3, sides weakly convex; anterior margin without serrations. In lateral view tall, type 2, disc flat, summit at midpoint. Anterior slope with densely spaced, broad asperities, becoming lower and more strongly transverse towards summit. Disc strongly shiny with sparse, minute punctures, some longer hairlike setae at margins. Lateral margins obliquely costate. Base transverse, posterior angles acutely rounded, almost quadrate. Scutellum small, linguiform, flush with elytra, flat, shiny. Elytra: 1.44 × as long as wide, 1.43 × as long as pronotum. Base transverse, edge oblique and unarmed by granules, humeral angles rounded, parallel-sided in basal 3/4, then angulate to apex. Disc convex, shiny, striae not impressed, with large, shallow punctures separated by less than one diameter of a puncture, glabrous; interstriae flat, very sparsely finely punctate, punctures half size of strial punctures, each with a long, erect seta (mostly abraded). Declivity occupying approximately half of elytra, gradual, face flat, opalescent; striae impressed, strial punctures as large as those of disc; interstriae impunctate, interstriae uniformly minutely granulate along the entire length. Posterolateral margin elevated, carinate and granulate to interstriae 7. Legs: procoxae contiguous. Protibiae obliquely triangular, posterior face smooth; apical 1/3 of outer margin with five moderate, spaced socketed denticles, their length as long as basal width. Mesotibiae flattened; outer margin evenly rounded with eight moderate socketed denticles. Distribution. Japan . Host plants. Unknown. Etymology. G. alastos = unforgettable. The specimen resided at least 140 years in the NHMUK before its recognition as a new species and its description. Adjective applied as a noun in apposition.