Wednesday, March 31, 2021

[Entomology • 2021] Nevromus jeenthongi & N. aspoeck • The Dobsonfly Genus Nevromus Rambur, 1842 (Megaloptera: Corydalidae: Corydalinae) from Thailand, with Description of A New Species


Nevromus jeenthongi 
Piraonapicha, Jaitrong, Liu & Sangpradub, 2021.

 Tropical Natural History. 21(1)

Abstract
Nevromus Rambur, 1842 is a megalopteran genus belonging to the family Corydalidae, and endemic to the Oriental faunal region. The Thai species of Nevromus are herein revised to include two species: Nevromus aspoeck Liu, Hayashi & Yang, 2012, and Nevromus jeenthongi sp. nov. The larval and pupal stages of N. aspoeck are described here for the first time. Nevromus jeenthongi sp. nov. appears to be closely related to N. aspoeck but differs from the latter species the occiput without black spots, the broader posterolateral lobes of male ninth sternum, and the fused male tenth gonocoxite strongly concaved along dorsal outline. Both species inhabit clean, clear flowing streams. The geographical distribution of Nevromus is updated with first records of this genus from the Malay Peninsula and Myanmar. A key to species of the genus based on male is provided.

Keywords: Nevromus, COI, stage association, new species, Thailand

Nevromus jeenthongi sp. nov., dorsal view.
A. male (Holotype, THNHM-I-21545); B. female (Paratype, THNHM-I-2008-0304). Scale bars: 1.00 cm

Nevromus jeenthongi sp. nov., living female, lateral view (Photo W. Zhang)

Nevromus jeenthongi sp. nov.

Diagnosis.— Head yellow to yellowish brown; occiput yellow without black markings; pronotum with two pairs of small black markings near lateral margins of pronotum in both sexes. Male ectoproct flatly foliate with a long and digitiform apex, fused tenth gonocoxites in ventral view strongly curved dorsad; ninth sternum with the posterolateral lobes broad, reaching to the lateral margin of ninth tergum.

Etymology.— The species epithet is dedicated to Mr. Tadsanai Jeenthong (National Science Museum, Thailand), who donated the holotype to THNHM.

Distribution.— Thailand (Surat Thani and Nakhon Si Thammarat Provinces); Myanmar (Tenasserim).


Nevromus aspoeck, larva in dorsal view.

Nevromus aspoeck, living male, lateral view.

Nevromus aspoeck Liu, Hayashi & Yang, 2012
Nevromus aspoeck Liu, Hayashi & Yang, 2012: 661. 
Type locality: China (Yunnan: Xishuangbanna).

Distribution.— Cambodia (Pursat  Province), China (Yunnan Province), Thailand (Chiang Mai, Mae Hong Son, Nan, Nakhon Ratchasima and Nakhon Nayok Provinces) (Fig. 17).


Kanyakorn Piraonapicha , Weeyawat Jaitrong, Xingyue Liu and Narumon Sangpradub. 2021. The Dobsonfly Genus Nevromus Rambur, 1842 (Megaloptera: Corydalidae: Corydalinae) from Thailand, with Description of A New Species. Tropical Natural History. 21(1); 94-118. tci-thaijo.org/index.php/TNH/article/view/248144