榕树(桑科:榕属)和榕小蜂(昆虫纲:膜翅目:小蜂总科)是研究适应、雄性多型等进化问题的理想材料。
The general antennal structures are commonly seen within other chalcid wasps except for a specialized 'explore area' on the ventral apex of female antenna.平腹小蜂的触角除了雌蜂触角末端腹面具有特化的斜截“探索区”以外,大体特征基本和其它小蜂相似。