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.

本文记述采自中国台湾山地的狭颊叶蜂属（Empria）新种Empria formosana Prous & Heidemaa, sp. n.。该记录是狭颊叶蜂属在台湾地区的首次报道，同时也是古北界内狭颊叶蜂属物种分布最靠南的记录之一。该新种与E. wui Wei & Nie, 1998以及产自中国、日本的部分其他物种亲缘关系相近，这些类群的前翅2A+3A脉存在缺失现象——该特征在狭颊叶蜂属内为独有。值得注意的是，E. formosana在该性状上存在显著的种内变异。本研究对3个形态上与E. formosana和E. wui亲缘关系最近的未描述物种的线粒体细胞色素c氧化酶亚基I（COI）及细胞核内转录间隔区1（ITS1）、内转录间隔区2（ITS2）序列进行分析，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，本文将该类群界定为E. wui种团。