Resin bees of the subgenus Ranthidiellum, are rare and endemic to Southeast Asia. These bees are known to construct resinous entrance tubes to their nests. Here, the new species Anthidiellum (R.) phuchongensissp. nov. is described along with a description of its nest collected from Phu Chong Na Yoy National Park, Ubon Ratchathani Province, Thailand. In addition, the bee cleptoparasite, Stelis (Malanthidium) flavofuscinularsp. nov., and the male of A. (R.) ignotum Engel, 2009, are described for the first time. A key to Ranthidiellum species is also provided.

中文翻译：

---

泰国的树脂蜜蜂亚属（Ranthidiellum）（Megachilidae，Anthidiini）：筑巢生物学，Stelis的克氏杆菌病和新物种

Ranthidiellum属的树脂蜜蜂是罕见的，并且是东南亚特有的。已知这些蜜蜂在它们的巢上构造树脂状的入口管。在这里，新种Anthidiellum（R.）phuchongensissp。十一月 描述了它的巢，并描述了从泰国乌汶府府崇南纳尤国家公园收集的巢。此外，蜜蜂的寄生虫是Stelis（Malanthidium）flavofuscinularsp。首次描述了A.（R.）ignotum Engel（2009年11月）的雄性。还提供了兰an属物种的关键。