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Two species of Tomoceridae were found near Dalat, southern Vietnam. Tomocerus ocreatus Denis, 1948 is redescribed based on a neotype specimen. Previous records of Tomocerus ocreatus in non-type localities are reevaluated. A new species Tomocerina annamitica sp. nov. is described. The new species is mainly characterized by its small body size, pointed tenent hair, compound dental spines and the absence of intermediate teeth on mucro.
The changes in coloration with age in males and females of Coeliccia mattii Phan & Kompier, 2016 from the Central Highlands of Vietnam are documented. Immature forms have extensive yellow markings on the thorax and S9 is yellowish, while in the fully mature male form, the thorax is largely black and covered in pruinosity and S9 is completely black. S9 is yellowish in the immature female while S9 is black in the fully mature female.
A record of male and female specimens of Sinolestes editus Needham, 1930 collected in Dak Hro village (14°19'45'' N, 108°24'23'' E, alt. 1,420m a.s.l.), Dak Roong Commune, K’Bang District, Gia Lai Province, Central Highlands of Vietnam is present with a detailed description of the morphology of these two specimens.
A collaborative survey of the scale insects (Hemiptera: Coccoidea) found on dracaena and fi cus plants in Cambodia, Laos, Thailand and Vietnam conducted in 2015 identifi ed 49 species of scale insects belonging to 36 genera in six families (25 species on dracaena, 42 species on fi cus). Of the species of scale insects that have been reported on dracaena and fi cus plants in southeastern Asia in the ScaleNet database (Ben-Dov et al. 2015), 32% and 17% were species collected in this survey, respectively. Twenty-three species (47%) of scale insects have been intercepted at Korean ports of entry on imported dracaena and fi cus plants from southeastern Asia from 1996 to 2014 (PIS 2015). Additionally, this list of species collected on these plants from exporting countries could be utilized as a basis for possible preventive measures in quarantine and inspection of traded products.
A new species of the genus Spinaethorax Papáč & Palacios-Vargas, 2016, recently erected for two cave species in Mexico, is described from a Vietnamese cave. It differs from the Mexican species most noticeably by the dorsal chaetotaxy of the head (number and morphology of chaetae), the shape of S-chaetae on the third antennomere, the dorsal chaetotaxy of the abdomen and the chaetotaxy of the dens. The pattern of special τ-chaetae is described for the first time in the genus. The affinities between Spinaethorax and the other genera of Neelipleona are discussed. Spinaethorax is propably closely related to Neelus Folsom, 1896. A table of the differential characters is provided for the three known species of Spinaethorax. Spinaethorax appears to be restricted to caves, but its presence in Vietnam indicates that this genus has a much larger distribution than previously recognized.
Part 1, Quoc Toan Phan and Van Quang To, page 1-6:
The genus Megalestes Selys, 1862 in Vietnam, with first description of female of Megalestes australis Karube, 2014 (Odonata: Zygoptera: Synlestidae)
Abstract: The male secondary genitalia and the caudal appendages of males and females of the three confirmed Vietnamese Megalestes species (M. australis, M. haui and M. micans) are figured. The female sex of M. australis is described for the first time.
Part 2, Quoc Toan Phan and Van Quang To, page 7-19:
Odonata checklist from Son Tra Nature Reserve, Da Nang city, central Vietnam
Abstract: A checklist of 44 odonate species (21 Zygoptera and 23 Anisoptera) from Son Tra Nature Reserve, central Vietnam is provided. Idionyx thailandica Hämäläinen, 1985 is recorded for the Vietnamese fauna for the first time, a new Coeliccia sp. is awaiting description in the near future, and the taxonomic status of specimens of the genus Leptogomphus remains unsettled and will have to be solved in the future.
Eight species of the genus Prodasineura Cowley, 1934 are recorded from Vietnam, including two newly described species: Prodasineura lancastrei sp. nov. and P. kong sp. nov. from north and central Vietnam. All species recorded are illustrated, including figures of morphological structures, and distribution maps and keys to the males and females are provided. We consider the record of P. laidlawi (Forster in Laidlaw, 1907) a misidentification and exclude it here.
Two new species of the genus Chlorogomphus are described based on both sexes collected from the Central Highlands of Vietnam. These species are C. hoaian sp. nov. (holotype male from Kon Ka Kinh National Park, 14.3672° N, 108.5368° E, alt. 1000 m) and C. vani sp. nov. (holotype male from Chu Yang Sin National Park, 12.4780° N, 108.4617° E, alt. 749 m). Furthermore, C. gracilis Wilson & Reels, 2001 is recorded from Vietnam for the first time, with notes on its morphology and detailed illustrations of male and female structures.
We describe a new species of the genus Zhangixalus Li, Jiang, Ren & Jiang, 2019 from Ha Giang Province, Vietnam based on morphological and molecular data. In the molecular phylogenetic analyses, the new species is nested in the Zhangixalus duboisi (Ohler, Marquis, Swan & Grosjean, 2000) group, where it is sister to Z. duboisi with a genetic distance of 2.51%. The new species, Zhangixalus franki sp. nov., differs from its congeners by a combination of the following morphological characters: size large, SVL 77.9–85.8 mm in males; finger webbing formula I1-1II0-1III½-0IV; dorsal surface of head and body green with dark brown spots; ventral surface grey or dark grey, white stripe along edge of jaw, insertion of limbs, and along lateral ridges of fore and hind limbs and flank, separating upper green part from lower grey part. The new species occurs in evergreen montane tropical forests at an elevation of ca 1300 m a.s.l. The new discovery brings the total number of known species in the genus Zhangixalus to 38 and the species number reported from Vietnam to nine.