Prodasineura doisuthepensis Hoess, 2007

Kosterin, Oleg E., 2015, Prodasineura hoffmanni sp. nov. (Odonata, Platycnemididae, Disparoneurinae) from eastern Cambodia, Zootaxa 4027 (4), pp. 565-577 : 573-576

Prodasineura doisuthepensis Hoess, 2007

( Fig. 3 b,d,6–7)

Specimens studied. 4♂, Cambodia, Mondulkiri Province, 3.5–3.8 km ESE of Sen Monorom, ‘Culminicola Rivulet’, a shady, very shallow reach with a gravel/silty bottom, 12°26'43–53'' N 107°13' 00–20'' E, 689–691 m asl, 8 vi 2014; 1♂, Cambodia, Mondulkiri Province, downstream Buu Sraa Waterfalls, ‘ Loringae brook’ (a conventional nickname), winding, silty, shaded by forest, 12°34’01–19'' N, 107°24'50''–25'03'' E, 416–490 m a.s.l., 12 vi 2014; 2♀ ( Fig. 6 ), the same locality, 15 vi 2014; 1♂, 1♀, Cambodia, Mondulkiri Province, the river above Buu Sraa waterfalls, large, up to 1.5 m deep, slow, partly shaded, 12°33'50–59'' N 107°25' 03–09'' E, 488–504 m asl, 9 vi 2014; O. Kosterin leg., in RMNH and the author’s collection.

Female. Head ( Fig. 6 h–i): top black above level of anteclypeus upper margin, yellowish below ( Fig. 6 h); vertex with a broad bluish yellow transverse stripe with irregular margins ( Fig. 6 i). Labrum yellow with a small black central spot at upper margin. Anteclypeus ochre-yellow with a black central stripe and a pair of transversally elongate black spots at lower margin ( Fig. 6 i). 1st antennal segment black with a yellow apex; rest blackish brown with a lighter brown apex of 2nd segment. Eyes in life with a dark brown upper half interrupted by a narrow greenish horizontal streak, bluish beneath.

Thorax: Prothorax black but lateral parts of all lobes yellowish, especially extensive at middle lobe ( Fig. 6 f–g). Posterior lobe with a pair of raised triangular anterior processes slightly curving anteriorly ( Fig. 6 f) and separated by a broad incision with straight bottom; posterior processes large, broadly rounded, slanting, directed rather up than behind ( Fig. 6 f), separated by a broad incision with a slightly convex bottom, not converging ( Fig. 3 d, 6g); space behind them yellow ( Fig. 6 g). Synthorax black with a yellowish pattern as follows ( Fig. 6 a–b):

– mesepisternum with a narrow (ca 25% as wide), gradually tapering and pointed antehumeral stripe not reaching antealar sinus;

– metepisternum with a broad stripe occupying about 3/4 of its width, embracing spiracle at its lower margin and having a shallow rectangular incision at upper 1/3 of its anterior margin;

– metepimeron lower half yellowish;

– inframesepisternum and inframetepisternum with yellowish posterior corners;

– poststernum yellowish except for lateral black stripes.

Coxae yellowish with large dark spots at their centres; legs yellowish with a black stripe along dorsal side of trochanters and femora and ventral side of tibiae; tarsi partly yellowish, partly, at segment joints, blackish ( Fig. 6 a).

Wings hyaline; venation brownish black; pterostigmata brownish with lighter rims. Anal bridge in all wings about as long as distance from its distal end to 1st crossvein; Postnodals 14–15 on forewing, 13 on hindwing. Abdomen: In general black dorsally, yellowish ventrally ( Fig. 6 a,c). S1 black, with a large rounded yellowish spot at posterior margin on either side and a smaller spot at ventral margin ( Fig. 6 a). On S3–6 dorsal black extends to tergite ventral margins to embrace a bright yellowish semiring, and slightly extends before posterior margin ( Fig. 6 a,c). S2–4 with a very faint yellowish dorsal streak. S7–9 mostly black with only narrow yellow stripes along tergite ventral and posterior margins ( Fig. 6 c); S8 with a dorsal streak and S9 with a dorsal mushroom-shaped spot ( Fig. 6 d). S10 yellowish on dorsum and along posterior margins, borders of whitish wavy, slanting towards lateroposterior corners ( Fig. 6 e). Cerci and paraprocts yellowish ( Fig. 6 c–e). Ovipositor black with yellowish margins ( Fig. 6 e).

Measurements (mm): Abdomen without anal appendages 33; hindwing 22; fore wing 23; total length 39.

Remarks. A broad irregular light stripe across the vertex; yellow anteclypeus with a black central stripe and a pair of lateral dark spots, yellow labrum with a small black central spot, broadly separated processes of the prothorax posterior lobes, bicolored legs and abdomen, dorsal light streaks on S8–9 and light S10 dorsum may help identification of females of P. doisuthepensis . They are similar to those of P. hoffmanni , but in the latter the black pattern is more extended throughout the body ( Fig. 1 c), the posterior processes of the prothorax are set closer to each other and converging ( Fig. 3 c, 4c), and the anteclypeus is black ( Fig. 4 i,j).

Males of P. doisuthepensis from Mondulkiri Province of Cambodia differ from the original description of the species from North Thailand ( Hoess 2007) in having the S9 blue spot diamond-shaped or roundish rather than triangular and the paraproct attenuated apical part entirely yellow instead of black outside.

Figures

FIGURE 1. Prodasineura hoffmanni sp. nov. in nature: a—male; b— tandem, in the type locality (Cambodia, Mondulkiri Province, 4.2 km SE of Dak Dam village), 14. VI. 2014.; c—female at the other locality at Dak Dam village, 16. VI. 2014.

FIGURE 3. Comparative sketches of the male anal appendages in lateral view (a – b) and female prothorax in dorsal view (c – d) of Prodasineura hoffmanni (a, c) and P. doisuthepensis (b, d). Colour borders are indicated with dots.

FIGURE 4. Details of female of Prodasineura hoffmanni; a—habitus of head, thorax and S 1 – 3 of abdomen, lateral view; bsynthorax, dorsal view; c—prothorax, dorsal view; d— ditto, frontal view; e— ditto, lateral view; f— S 6 – 10 of abdomen, lateral view; g—end of abdomen, lateral view; h— ditto, dorsal view; i—head, dorsal view; j— ditto, frontal view; k— ditto, ventral view. Not to scale.

FIGURE 6. Details of a female of Prodasineura doisuthepensis from Cambodia, Mondulkiri Province, downstream Buu Sraa Waterfalls, ‘ Loringae brook’, 15 vi 2014: a—habitus of head, thorax and S 1 – 3 of abdomen, lateral view; b—synthorax, dorsal view; c—S 6 – 10 of abdomen, lateral view; d—end of abdomen, dorsal view; e— ditto, lateral view; f—prothorax, lateral view; j— ditto, lateral view; h—head, frontal view; i— ditto, dorsal view.