A review of the powderpost beetle genus, Xylopertha Guérin-Méneville, 1845, with a new species and new synonymy (Coleoptera: Bostrichidae: Bostrichinae: Xyloperthini) Author Liu, Lan-Yu Author Beaver, Roger A. text European Journal of Taxonomy 2017 380 1 22 journal article 31127 10.5852/ejt.2017.380 f8fcdbf0-801e-4a75-865b-f09046be1d53 1118246 F80DE451-78CA-406A-A879-E7BD08279ECD Key to species of Xylopertha 1. Elytral declivity with a spine on each elytron in both sexes ( Fig. 1E–H ) ………………………2 – Elytral declivity without spines in both sexes ( Fig. 1A–D ) ……………………………………3 2. Tubercle-like spine with a pointed apex located on the dorso-lateral margin of the declivity of each elytron ( Figs 1E–F ; 3B). Male: 8th tergite and genitalia as in Fig. 5C–D . Female: last four abdominal ventrites as in Fig. 4C ……………………………………… X. praeusta ( Germar, 1817 ) – Spine located on the middle of upper margin of the declivity of each elytron ( Figs 1G–H ; 3D). Male: eighth tergite and genitalia as in Fig. 5G–H . Female: last three abdominal ventrites as in Fig. 4D ……………………………………………………………… X. reflexicauda ( Lesne, 1937 ) 3. Male: upper margin of elytral declivity without long, erect hairs. The 8th tergite and genitalia as in Fig. 5E–F . Female: apex of each elytron projecting as a broad approximately rectangular process, its apex with a small pointed tooth next to the suture, the processes separated by a shallow U-shaped emargination, a broad emargination lateral to each process ( Fig. 3C ); 3rd abdominal ventrite projecting medially over 4th, which is visible only at sides; 5th ventrite very deeply, broadly emarginate, base of emargination projecting ventrally as a thin lamina behind process on the 3rd ventrite, concealing middle part of 4th ventrite ( Fig. 4B ) ……………… X. elegans sp. nov. – Male: upper margin of elytral declivity bearing long, erect hairs. The 8th tergite and genitalia as in Fig. 5A–B . Female: apex of each elytron strongly emarginate, the emargination filled by a pair of ventrally-directed processes with rounded tips next to suture ( Fig. 3A ); 3rd abdominal ventrite not projecting medially over 4th, which is visible across its entire width, base of emargination of 5th ventrite not projecting ventrally as a thin lamina ( Fig. 4A ) …… X. retusa ( Olivier, 1790 )