A new genus and species of the family Angarosphecidae, Decasphex cretacicus gen. et sp. nov., from the mid-Cretaceous Burmese amber is described and illustrated. The new genus and species is most similar to Burmasphex Melo et Rosa, 2018 and can be easily distinguished in having female antenna 10-segmented (vs. 12-segmented), mesosoma more elongate, forewing with cell 2cua lower, and metasomal segments 1–3 not separated with deep constrictions. Ten-segmented female antenna is a novel morphotype example of the morphological diversity of Apoidea. A key to genera of the Angarosphecidae is provided.

中文翻译：

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来自白垩纪中期缅甸琥珀的新的食蚁兽黄蜂（膜翅目：Apoidea，Angarosphecidae）

角鲨属（Decasphex cretacicus gen）的一种新的属和种类。等。十一月，从白垩纪中期的缅甸琥珀开始描述。新属和新种与Burmasphex Melo et Rosa，2018最相似，可以很容易地分辨为：雌性触角分为10段（与12段相比），中胚层更细长，前突细胞减少2cua，并且变体段为1– 3不要与深部狭窄分开。十节女天线是Apoidea形态多样性的新形态型实例。提供了食蚁兽属的钥匙。