Piraonapicha Kanyakorn, Sangpradub Narumon, Jaitrong Weeyawat, Liu Xingyue
Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand..
Zootaxa. 2020 Jun 2;4786(2):zootaxa.4786.2.5. doi: 10.11646/zootaxa.4786.2.5.
Indosialis Lestage, 1927 is a small and rare megalopteran genus belonging to the family Sialidae and endemic to the Oriental region. The Thai and Lao species of Indosialis are herein revised by an integrative approach combining morphological and molecular evidence, including two species: Indosialis bannaensis Liu, Yang Hayashi, 2006 and Indosialis siamensis sp. nov. The pupal stage of Indosialis is reported here for the first time. Indosialis siamensis sp. nov. can be distinguished from its congeners by 1) the brown head and prothorax (orange in congeners); 2) the apical tooth of right mandible in male sharply angulated (truncate or almost absent in congeners); and 3) the distinct sac-like structure present in male genitalia (indistinct or absent in congeners). The new species coexists with I. bannaensis in Loei Province, northeastern Thailand. Both species inhabit slow-flowing or sluggish streams that are usually covered by Colocasia esculenta (L.) Schott (Araceae).
印度石蛉属（Indosialis），1927年，是一种小型且稀有的广翅目昆虫，属于泥蛉科，为东洋区特有。本文采用形态学和分子证据相结合的综合方法，对印度石蛉属的泰国和老挝物种进行了修订，包括两个物种：版纳印度石蛉（Indosialis bannaensis Liu, Yang Hayashi, 2006）和新种暹罗印度石蛉（Indosialis siamensis sp. nov.）。本文首次报道了印度石蛉属的蛹期。暹罗印度石蛉新种可通过以下特征与其同属物种区分开来：1）头部和前胸棕色（同属其他物种为橙色）；2）雄性右颚顶端齿呈锐角（同属其他物种截形或几乎没有）；3）雄性生殖器有明显的囊状结构（同属其他物种不明显或没有）。新物种与版纳印度石蛉共存于泰国东北部的黎府。这两个物种都栖息在水流缓慢或滞缓的溪流中，这些溪流通常被芋（Colocasia esculenta (L.) Schott，天南星科）覆盖。
