Li Wen-Juan, Mu Peng-Xu, Zhou Chang-Fa
The Key Laboratory of Jiangsu Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing 210023, China.
Zootaxa. 2022 Nov 24;5213(2):149-158. doi: 10.11646/zootaxa.5213.2.3.
The enigmatic mayfly Potamanthodes nanchangi Hsu, 1936 was briefly described based on a male. Currently, this species has an unclear taxonomic position and no supporting type specimen, consequently its recognition, differentiation and classification is vague. In this study, by using fresh specimens from type locality in Jiangxi province at central China, this species is redescribed, photographed, and a neotype is designated. This species evidently belongs to the genus Potamanthodes Ulmer, 1920 by its short mandibular tusks (shorter than head), presence of setae row on forefemora of nymphs, slender and deeply bifurcated V-shaped penes, common base of MP2 and CuA of forewings. Significant morphological characters defining this species are relatively long penial tips, greatly bent R1 of hindwings and small compound eyes of the males, large mandibular tusks and long forelegs of the nymphs. Therefore, the P. nanchangi is indeed a valid and apomorphic species in the genus Potamanthodes.
神秘的南昌短脉石蝇Potamanthodes nanchangi Hsu，1936年基于一只雄性个体被简要描述。目前，该物种的分类地位尚不明确，且没有模式标本作为支撑，因此其识别、区分和分类都很模糊。在本研究中，通过使用来自中国中部江西省模式产地的新鲜标本，对该物种进行了重新描述、拍照，并指定了新模标本。该物种因其短的下颚齿（短于头部）、若虫前股节上有刚毛列、细长且深深分叉的V形阳茎、前翅MP2和CuA的共同基部，显然属于1920年的短脉石蝇属Potamanthodes Ulmer。定义该物种的显著形态特征包括相对较长的阳茎顶端、后翅R1强烈弯曲以及雄性的小复眼、若虫的大下颚齿和长前腿。因此，南昌短脉石蝇确实是短脉石蝇属中一个有效的、具有鉴别特征的物种。
