Data from: Empria formosana sp. n. from Taiwan with notes on E. wui species group (Hymenoptera, Tenthredinidae)

Empria formosana Prous & Heidemaa, sp. n. is described from the mountains of Taiwan. The record is the first of this genus from Taiwan and one of the southernmost occurrences of the Empria species in the Palaearctic. The new species appears to be close to E. wui Wei & Nie, 1998 and some other species from China and Japan with incomplete vein 2A+3A in forewing (unique among Empria). Remarkably, E. formosana shows considerable intraspecific variation for this character. The mitochondrial (COI) and nuclear (ITS1 and ITS2) sequences of three undescribed species morphologically closest to E. formosana and E. wui indicate that most likely they all form a monophyletic group within Empria, defined here as E. wui species group.本文记述采自台湾山区的新种台湾狭颊叶蜂（Empria formosana Prous & Heidemaa，sp. n.）。该记录为狭颊叶蜂属（Empria）在台湾的首次报道，同时也是古北界（Palaearctic）内狭颊叶蜂属物种分布最靠南的记录之一。该新种与吴伟氏狭颊叶蜂（E. wui Wei & Nie, 1998）以及部分产自中国、日本的物种亲缘关系较近，这些物种的前翅2A+3A脉存在缺失，该特征在狭颊叶蜂属中为独特性状。值得注意的是，台湾狭颊叶蜂在该性状上存在显著的种内变异。对3个形态上与台湾狭颊叶蜂和吴伟氏狭颊叶蜂最为相近的未描述物种的线粒体（COI）及核（ITS1、ITS2）序列的分析结果显示，这些物种极有可能共同构成狭颊叶蜂属内的一个单系群，本文将其界定为吴伟氏狭颊叶蜂物种群（E. wui species group）。