Kosterin Oleg E
Institute of Cytology Genetics SB RAS, Acad. Lavrentyev ave. 10, Novosibirsk, 630090, Russia. Novosibirsk State University, Pirogova str. 2, Novosibirsk, 630090, Russia.
Zootaxa. 2019 Jun 12;4615(1):zootaxa.4615.1.3. doi: 10.11646/zootaxa.4615.1.3.
The taxa of the genus Macrogomphus Selys, 1858 occurring in continental south-east Asia are reconsidered. Macrogomphus rivularis Förster, 1914 (described from Vietnam), M. borikhanensis Fraser, 1933 (described from Laos), and M. guilinensis Chao, 1983 (described from China), are synonymised with M. albardae Selys, 1878. The relationship and conspecificity of the latter with M. parallelogramma Burmeister, 1839 are doubtful, perhaps they are bona species. Males of M. albardae (and seemingly of parallelogramma as well) are approximately trimorphic for the pale pattern of the abdominal S3-S6, being of either a 'dashed morph' (with small isolated anteriolateral spots and conspicuous middorsal streaks), or a 'ringed morph (with broad anterior rings and less conspicuous middorsal streaks), or an 'intermediate morph'. Validity of the species M. matsukii Asahina, 1986 is doubted; its holotype could be an aberrant male of M. albardae. The main diagnostic character of M. albardae, M. phalantus Lieftinck, 1935 and probably M. parallelogramma, is clarified to be the structure of the cercus inner branch. M. phalantus jayavarman subsp. nov. is described from temporarily inundated forest at the northern bank of the great Lake Tonlé Sap of Cambodia (Siem Reap Province, 1.5 km SSW of Kampong Pluk village, 13.1956° N, 103.9725° E, 3 m a.s.l.), which is ca 1,300 km north and overseas from the presumed range of M. phalantus phalantus.
对1858年赛利斯（Selys）所定的巨春蜓属（Macrogomphus）分布于东南亚大陆的分类单元进行了重新审视。1914年福斯特（Förster）描述于越南的溪流巨春蜓（Macrogomphus rivularis）、1933年弗雷泽（Fraser）描述于老挝的博里坎巨春蜓（M. borikhanensis）以及1983年赵修复描述于中国的桂林巨春蜓（M. guilinensis）均被视为1878年赛利斯所定的阿尔巴德巨春蜓（M. albardae）的同物异名。后者与1839年布尔梅斯特（Burmeister）所定的平行巨春蜓（M. parallelogramma）的关系及是否同种存疑，或许它们是独立的物种。阿尔巴德巨春蜓（似乎平行巨春蜓也是）的雄性腹部S3 - S6浅色斑纹大致有三种形态，即“虚线形态”（具小的孤立前侧斑和明显的中背条纹）、“环状形态”（具宽的前环和不太明显的中背条纹）或“中间形态”。1986年朝比奈定的松木巨春蜓（M. matsukii）的有效性存疑；其正模标本可能是阿尔巴德巨春蜓的异常雄性个体。明确阿尔巴德巨春蜓、1935年利夫廷克（Lieftinck）所定的法兰特巨春蜓（M. phalantus）以及可能的平行巨春蜓的主要鉴别特征为尾铗内支的结构。新亚种法兰特巨春蜓阇耶跋摩亚种（M. phalantus jayavarman subsp. nov.）描述于柬埔寨洞里萨湖北岸的临时淹没森林（暹粒省，磅普卢克村西南偏南1.5公里处，北纬13.1956°，东经103.9725°，海拔3米），此地位于法兰特巨春蜓指名亚种推测分布范围以北约1300公里且在境外。
