Euphaea hirta Hämäläinen & Karube, 2001

Phan, Quoc Toan, Kompier, Tom, Karube, Haruki & Hayashi, Fumio, 2018, A synopsis of the Euphaeidae (Odonata: Zygoptera) of Vietnam, with descriptions of two new species of Euphaea, Zootaxa 4375 (2), pp. 151-190 : 183-184

Euphaea hirta Hämäläinen & Karube, 2001

( Figs 14a , 15c , 16a–b , 18d, 18i )

Euphaea hirta: Hämäläinen & Karube (2001) , pp. 209–215, Figs 2 , 5 , 6 , 7 , 10 [Holotype and paratypes from Bao Loc area, Lam Dong Prov.]; Do & Dang (2007), p. 35 [Distribution map, additional record from Vinh An, Dong Nai Prov.].

Materials examined. [ Vietnam] 1♂, Bao Loc , Lam Dong Prov., 16.III.2016, Q.T. Phan leg. ( PQTC) ; 2♂, Bao Loc , Lam Dong Prov., 22.IV.2016, Q.T. Phan leg. ( PQTC) ; 1♂, Bao Loc , Lam Dong Prov., 16.V.2016. T. Kompier leg. (TKC) ; 1♀, Bao Loc , Lam Dong Prov., 12.VI.2016, T. Kompier leg. (TKC) ; 2♂ 2♀, Nam Nung Nature Reserve , Dak Nong Prov., 25.III.2013, F. Hayashi leg. (FHC) ; 9♂ 2♀, Da Ton, Bao Lam District , Lam Dong Prov., 21.IV.2016, Q.T. Phan leg. ( PQTC) .

Female specimen used for description: 1♀, Nam Nung Nature Reserve , Dak Nong Prov., 25.III.2013, F. Hayashi leg.

Other materials confirmed by field observations. [ Vietnam] Some individuals, Lam Dong Prov., V, VI.2016, V.2017, T. Kompier; 7 exs, Cat Tien National Park, Dong Nai Prov., 29.I.2017, T. Kompier.

Notes. Euphaea hirta was originally described based on male specimens from Lam Dong Prov., Vietnam ( Hämäläinen & Karube 2001), and is characterized by the paraproct being invisible in lateral view (a character unique within the genus) and by the abundant setae on the abdomen (notably on S4–5, S8–10 and cerci) ( Fig. 15c ) of the male in comparison to E. guerini ( Fig. 15b ) and E. masoni ( Fig. 15d ); E. guerini also differs from both hirta and masoni by wholly opaque hind wings ( Fig. 14a–c ). The female of Euphaea hirta has not been reported earlier and is described in this paper for the first time. It can be distinguished from female Euphaea masoni by the lateral corners of posterior lobe of prothorax rounded ( Fig. 18i ), not angular as in E. masoni ( Fig. 18j ). In addition, it has narrow thoracic stripes and reduced abdominal markings compared to Euphaea masoni ( Fig. 16a, c ) and its frons lacks yellowish markings ( Fig. 16b ). Female of Euphaea hirta resembles female E. guerini and E. saola sp. nov., but these two species have narrower yellowish markings on thorax ( Figs 16d–e ), although to some extent these characters are age-dependant and must be treated with care.

Description of female. Head ( Fig. 16a–b ). Anteclypeus, postclypeus, frons, and all upper parts of head are black, but for two oval yellowish spots between the antennae and the lateral ocelli. Genae and area between clypeus and eye border broadly yellow, with a black oval spot inside. Base of mandibles yellow, but anterior margin black. Labrum, with large yellow spot, split almost in two parts, but connected along ventral border. Antennae black.

Thorax ( Fig. 16a ). Prothorax is black with a yellow spot on the propleuron. Anterior lobe is entirely black, the middle lobe is black with a pair of large triangular yellow spots. The posterior lobe is black with a small yellow spot at the center and the lateral corners extensively yellow ( Fig. 18i ). Synthorax black with yellow stripes along sutures as shown in Fig. 16a .

Legs. Entirely black.

Wings. Hyaline with black venation.

Abdomen ( Fig. 16a ). Black with yellow marking laterally as follows: S1 has a broad marking. S2–6 have long and thin stripes becoming indistinct distally on each segment. S7 with small anterolateral spot. S8–10 wholly black. Ovipositor black, shown in Figure 16a .

Measurement (in mm). HW 28; abdomen (incl. appendages) 26.

Distribution. Vietnam (Dak Nong, Lam Dong and Dong Nai Provinces).

Figures

FIGURE 2. Anisopleura qingyuanensis. [2a–d] ♂ and [2e–f] ♀, Tu Le. (2a) head and thorax; (2b) head, oblique-dorsal view; (2c) appendages, dorsal view; (2d) appendages, lateral view; (2e) head and thorax; (2f) head, oblique-dorsal view.

FIGURE 5. Bayadera continentalis. [5a–d] ♂ and ♀, Dong Van and [5e–h] ♂, Pia Oac. (5a) male head and thorax; (5b) appendages, dorsal view; (5c) appendages, lateral view; (5d) female head and thorax; (5e) male head and thorax; (5f) appendages, dorsal view; (5g) appendages, lateral view; (5h) wings.

FIGURE 6. Bayadera hatvan. [6a–d] ♂ and [6e] ♀, Pia Oac. (6a) head and thorax; (6b) appendages, dorsal view; (6c) appendages, ventral view; (6d) wings; (6e) head and thorax.

FIGURE 7. Bayadera hyalina. [7a–f] ♂ and ♀, Yen Bai and [7g–h] ♂ and ♀, Yunnan. (7a) male head and thorax; (7b) appendages, dorsal view, (7c) appendages, lateral view; (7d) appendages, ventral view; (7e) male wings; (7f) female head and thorax; (7g) male head and thorax; (7h) female head and thorax.

FIGURE 10. Bayadera serrata. [10a–e] ♂ and [10f–i] ♀. (10a) head and thorax; (10b) head, oblique-dorsal view; (10c) appendages, dorsal view; (10d) appendages, lateral view; (10e) appendages, ventral view; (10f) head and thorax; (10g) head, antero-dorsal view; (10h) abdominal tip; (10i) wings.

FIGURE 14. Dorsal view of wings of male Euphaea spp. (14a) E. hirta; (14b) E. masoni; (14c) E. guerini; (14d) E. saola sp. nov.

FIGURE 16. Euphaea spp. all ♀. (16a–b) body and head of E. hirta, Nam Nung; (16c) E. masoni, Bao Loc; (16d) E. guerini, Tay Giang; (16e) E. saola sp. nov., A Luoi.

FIGURE 18. Euphaea spp. [18a–f] vesicle of male and [18g–j] prothorax of female, dorsal view. (18a, b, g) E. saola sp. nov. from (18a) A Luoi and (18b) Chu Mom Ray; (18c, h) E.guerini, Bhalee; (18d, i) E. hirta, Nam Nung; (18e, j) E.masoni, Lang Van; (18f)E. pahyapi, Phu Quoc.

FIGURE15.Schematic drawingsof abdominal hair tufts inlateral view ofmale Euphaeaspp.(15a) E.saola sp.nov.; (15b)E. guerini; (15c) E.hirta; (15d) E.masoni and E. pahyapi. I–X show abdominal segments S1–10.