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| [1-2] Chlorogomphus hoaian; [26-27] C. vani Phan & Karube, 2022 |
ABSTRACT
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, ..., alt. 1000 m) and C. vani sp. nov. (holotype male from Chu Yang Sin National Park, ..., 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.
Keywords: Odonata, Chlorogomphus, new species, Vietnam
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Habitus of Chlorogomphus hoaian sp. nov. 1. Holotype, ♂ (ZCDTU 2019042001-ODO). 2. Paratype, ♀ (ZCDTU 2019042003-ODO). Habitus of Chlorogomphus vani sp. nov. 26. Holotype, ♂ (ZCDTU 2021042001-ODO). 27. Paratype, ♀ (ZCDTU 2021042003-ODO). |
Class Insecta Linnaeus, 1758
Order Odonata Fabricius, 1793
Suborder Anisoptera Selys, 1854
Family Chlorogomphidae Needham, 1903
Genus ChlorogomphusSelys, 1854
Chlorogomphus hoaian sp. nov.
Diagnosis In lateral view, Chlorogomphus hoaian sp. nov. shows short, robust cerci and an epiproct which are generally similar to those of seven other species: C. aritai, C. arooni Asahina, 1981, C. caloptera, C. daviesi Karube, 2001, C. fraseri, C. nakamurai and C. yokoii Karube, 1995. However, C. hoaian sp. nov. is different from these seven species in major characteristics (alternative characters for the seven other species in parentheses): the cerci (Figs 12–13) are subequal in length to the epiproct (half as long except in C. caloptera); the dorsoposterior margin of S10 is broadly convex (narrowly convex); the length of the cerci is half that of the epiproct and S10 extends apically (except in C. caloptera, C. arooni (Asahina 1981: figs 7–8), C. caloptera (Karube 2013: fig. 6g), C. daviesi (Karube 2001: figs 5–6) and C. yokoii (Karube 1995: figs 15–16); the cerci are acute apically (Fig. 12) (blunt apically in C. nakamurai; see Karube 1995: figs 36–37).
Etymology: ‘Hoaian’, named after Mrs Van Cong Hoai An (born 1992) of Da Nang City, Vietnam, the wife of the first author, a noun in apposition.
Distribution: Vietnam (Fig. 61: yellow circle): Kon Tum Province (Dak Glei District) and Gia Lai Province (Mang Yang District and Ka Bang District).
Habitat and ecology: The new species was discovered coursing up and down over small streams (2–4 m width) interspersed with large stones within dense vegetation in a pristine forest. No other specimens of Chlorogomphus were found at the type locality.
Chlorogomphus vani sp. nov.
Diagnosis: Within this genus, the new species seems to be closest to Chlorogomphus auratus and C. canhvang based on the similar male appendage morphology and the amber pattern on the female wings. Chlorogomphus vani sp. nov. differs from two above mentioned species by the following characters: In the male anal appendage morphology, (1) in lateral view, the cercus is shorter than the epiproct (Fig. 37), while it is subequal in C. auratus (Fig. 39) and C. canhvang (Fig. 41); (2) in dorsal view, the cercus is simple and bluntly acute apically (Fig. 38), while it is expanded apically in C. auratus (Fig. 40) and C. canhvang (Fig. 42); (3) in lateral view, S10 has no protrusion between the cerci in C. vani sp. nov. (Fig. 37), but this structure is clearly visible and stout in C. auratus (Fig. 39); and (4) the secondary genitalia of C. vani sp. nov. are similar to those in C. auratus (Karube 1995: fig. 8) but its anterior lamina is ....
Etymology: ‘Vani’, a noun in the genitive case, is named after Mr Dang Ngoc Van (born 1987), resident of Bao Loc District of Lam Dong Province, who kindly supplied the authors with the specimens of this new species, as well as other material from southern Vietnam.
Distribution: Vietnam (Fig. 62: yellow rectangle): Dak Lak (Chu Yang Sin National Park) Province.
Quoc Toan Phan and Haruki Karube. 2022. Description of Two New Species of the Genus Chlorogomphus Selys, 1854 (Odonata: Chlorogomphidae) and a new record of Chlorogomphus gracilis Wilson & Reels, 2001 from the Central Highlands of Vietnam. European Journal of Taxonomy. 794(1), 91-110. DOI: doi.org/10.5852/ejt.2022.794.1657
