Tricosa uniseriata, a new species of xyleborine ambrosia beetle from Thailand (Coleoptera, Curculionidae, Scolytinae, Xyleborini) Author Sittichaya, Wisut https://orcid.org/0000-0001-6200-1285 Agricultural Innovation and Management Division, Faculty of Natural Resources, Prince of Songkla University, Had Yai, Songkhla, 90112, Thailand wisut.s@psu.ac.th Author Cognato, Anthony I. Department of Entomology, Michigan State University, 288 Farm Lane, 243 Natural Science Bldg., East Lansing, MI 48824, USA text ZooKeys 2023 2023-03-15 1153 97 103 http://dx.doi.org/10.3897/zookeys.1153.101985 journal article http://dx.doi.org/10.3897/zookeys.1153.101985 1313-2970-1153-97 600808336C7E423D91EEB48F9D96A7CB AEF57F075B5651C68617F6CB6020E022 Tricosa Cognato, Smith & Beaver, 2020 Type species. Xyleborus metacuneolus Eggers, 1940. Diagnosis. Antennal funicle four-segmented; antennal club with one or two sutures visible on the posterior face; protibia distinctly or obliquely triangular with six or fewer denticles on outer margin and posterior face flattened and unarmed; scutellum small, flush with elytra surface; mycangial tufts absent; elytra attenuate; posterolateral costa absent. Similar genera. Cryptoxyleborus , Cyclorhipidion , and Fraudatrix .