The myrmicine genus Rotastruma is a rarely collected arboreal ant group and only two species, R. recava Bolton and R. stenoceps Bolton, are known from the Oriental Region. A new species, R. epispinasp. nov., is described from Cambodia based on the worker and queen castes. The new species is distinguished from R. recava and R. stenoceps by having the propodeal spine directed upwards and elongated peduncle of the petiole. Herein, we provide an update to the identification key and diagnostic characters for the genus Rotastruma.

中文翻译：

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来自柬埔寨的第三种稀有蚂蚁 Rotastruma（膜翅目，蚁科），具有图解的通用诊断和物种关键

桃金娘属 Rotastruma 是一种很少收集的树栖蚂蚁群，在东方地区只知道两个物种，R. recava Bolton 和 R. stenoceps Bolton。一个新物种，R. Epispinasp。11 月，根据工人和王后种姓从柬埔寨描述。新物种与 R. recava 和 R. stenoceps 的区别在于，前棘朝上，叶柄的花序梗加长。在此，我们更新了 Rotastruma 属的识别密钥和诊断特征。