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.

本研究基于采自台湾山区的标本，对台湾厚爪叶蜂（Empria formosana Prous & Heidemaa，新种）进行了正式描述。该记录为厚爪叶蜂属（Empria）在台湾地区的首次分布报道，同时也是古北界范围内厚爪叶蜂属物种分布纬度最靠南的记录之一。该新种与吴伟厚爪叶蜂（E. wui Wei & Nie, 1998）以及中国、日本的部分类群亲缘关系较近，这些类群的前翅翅脉2A+3A存在缺失（该特征在厚爪叶蜂属内为独有）。值得注意的是，台湾厚爪叶蜂在该翅脉特征上存在显著的种内变异。研究人员对3个形态上与台湾厚爪叶蜂和吴伟厚爪叶蜂最为接近的未描述物种的线粒体基因（COI）及核基因（ITS1、ITS2）序列进行分析后发现，这些物种极有可能在厚爪叶蜂属内构成一个单系群，本文将该类群定义为吴伟厚爪叶蜂物种群（E. wui species group）。