Abstract A new auger beetle, Cretolgus minimus gen. et sp. nov., of the subfamily Polycaoninae (Bostrichidae) is described from mid-Cretaceous Burmese amber. The new genus differs from the genera Melalgus Dejean, 1833 and Polycaon Castelnau, 1836 in the subcylindrical body, striate elytra, contiguous procoxal cavities, four-segmented tarsi, and small body size. This is the first fossil record of the subfamily Polycaoninae and the second record of Bostrichidae in Burmese amber.

中文翻译：

---

中白垩世缅甸琥珀中毛茛亚科（鞘翅目；博斯特里奇亚科）的首次记录

摘要 一种新的螺旋钻甲虫 Cretolgus minimus gen。等 sp. nov., 亚科 Polycaoninae (Bostrichidae) 是从白垩纪中期的缅甸琥珀中描述的。新属与 Melalgus Dejean, 1833 和 Polycaon Castelnau, 1836 的不同之处在于亚圆柱体、纹鞘翅、连续的前喙腔、四节跗节和小体型。这是缅甸琥珀中Polycaoninae亚科的第一个化石记录和Bostrichidae的第二个记录。