Devadatta kompieri, Phan, Quoc Toan, Sasamoto, Akihiko & Hayashi, Fumio, 2015

Phan, Quoc Toan, Sasamoto, Akihiko & Hayashi, Fumio, 2015, Description of two new species of the genus Devadatta from northern Vietnam and central Laos (Odonata: Devadattidae), Zootaxa 3941 (3), pp. 414-420 : 415-418

Devadatta kompieri sp. nov.

( Figs. 1 A, 2A, 3A, 4A)

Material examined. Holotype ( Fig. 1 A): male; Vietnam, Yen Bai Province, Mu Cang Chai District, Tu Le Community, “Nậm Ch ậu” bridge; 19-V-2014; Quoc Toan Phan leg. (in TMUZ). Paratypes: 4 males, the same site and date as in holotype (1 in TMUZ, 3 in PQTC).

Etymology. The new species is named after Mr. Tom Kompier, an enthusiastic entomologist, who has recommended several good study sites in northern Vietnam to the first author and kindly supplied us with many interesting damselfly specimens from Vietnam.

Description of the holotype male. Head: Labrum, mandibles, and antennae black; postclypeus, frons and upper surface of head metallic dark blue; mouth parts bearing short brown setae; ocellus olive; occipital area glossy black.

Thorax: Dorsal and lateral lobes of prothorax black, with pruinescence on part of basal and ventral areas. Synthorax generally black dorsally and laterally, lacking any pale maculation, with pale blue pruinescence over much of basal part of metepimeron and ventral surface. Legs brown with pruinescence on coxa; femur and tibia with strong but slender spines.

Wings ( Fig. 2 A): Venation black, membrane hyaline with slight pale yellow tint in mature male. Fw is a little longer and narrower than Hw; both wings petiolated slightly proximal to anal crossing. Eleven antenodal veins in Fw and 10 in Hw; subcostal veins proximal to subnodus with 4–5 crossveins in both wings; 38 postnodal veins in Fw and 30 in Hw; arculus situated at 6th antenodal in Fw and 5th in Hw; cubital space in Fw with 3 crossveins before anal crossing, the same of Hw with 3 or 4 veins; quadrangle space with 3 or 4 crossveins in Fw, and 2 or 3 crossveins in Hw; first anal vein meeting wing margin before the level of nodus in Fw, almost equal with nodus in Hw; distal space between first anal vein and wing posterior margin rowed 2 or 3 cells in Fw and 1 or 2 in Hw, respectively. Pterostigma dark brown, covering 5 to 6 underlying cells in Fw, and 5 in Hw. Wing tip with dark brown patch, covering a little more than half the area between distal end of pterostigma and apex in Fw, about onethird in Hw.

Abdomen: Blackish brown, with pruinescence laterally on S1 and S2 and ventral surface of all segments. Anal appendages ( Fig. 3 A) blackish, with pruinescence; superior appendage a little more than twice as long as inferior in lateral view; superior appendage in dorsal view bent in the middle with distal portion turning obliquely inwards with inner margin expanded and tip obtusely swollen; apices of superior pair barely overlapping each other. Inferior appendage short and strongly tapering in lateral view; the tip sharply hooked inwards. Penile organ ( Fig. 4 A) is similar to that of D. ducatrix ( Fig. 4 C), lobes at apex of distal segment approximately semicircular.

Measurements (mm). Hw 32, abdomen including appendages 37.

Variation in paratype males. The anterior lobe of prothorax, synthorax, and anal appendages pruinose in mature male, but becoming matte black with increasing age. Details of wing venation as follows: in Fw, antenodal veins 10–13, postnodal 37–42, cubital space with 3–4; in Hw, antenodal 10–12, postnodal 29–39, cubital space with 4–6.

Measurements (mm). Hw 31–34; abdomen including appendages 32–37.

Female. Unknown.

Notes on biology. Devadatta kompieri was found at a small spring-fed brooklet in pristine forest. Like its congeners, D. kompieri males occasionally showed up at sunny spots making short flights. Devadatta ducatrix was also found at the same site. The first author noticed no differences in behaviour between D. kompieri and D. ducatrix during a short stay at the site. Other damselfly species observed at the same site were: Mnais andersoni McLachIan, 1873, Philoganga vetusta Ris, 1912 , Caliphaea sp. allied to C. confusa Hagen, 1859 , and Agriomorpha sp.

Differential diagnosis. D. kompieri is similar to D. ducatrix and also D. yokoii described in the next section, but the males can be distinguished from each other (see diagnosis under D. yokoii ).

Figures

FIGURE 1. Devadatta spp. A, holotype of D. kompieri (male). B, holotype of D. yokoii (male). C, D. ducatrix of the specimen collected at Tu Le Community, Mu Cang Chai District, Yen Bai Province, northern Vietnam. The scale is marked in mm and the same for A and C.

FIGURE 2. Male fore- and hindwings of Devadatta kompieri. (A), D. yokoii (B), and D. ducatrix (C, same specimen shown in Fig. 1 C).

FIGURE 3. Male caudal appendages of Devadatta kompieri (A), D. yokoii (B), and D. ducatrix (C, rearranged from Lieftinck 1969, p. 207, Fig. 2) in lateral, dorsal, and ventral views.

FIGURE 4. Male penile organs of Devadatta kompieri (A), D. yokoii (B), and D. ducatrix (C, rearranged from Lieftinck 1969, p. 207, Fig. 2) in lateral and ventral views.