Prodasineura hoffmanni Kosterin, 2015

Phan, Quoc Toan & Ngo, Quoc Phu, 2020, A revision of the systematics and distribution of the damselfly genus Prodasineura Cowley, 1934 (Odonata: Zygoptera: Platycnemididae) in Vietnam with description of two new species, European Journal of Taxonomy 650, pp. 1-27 : 6-9

Prodasineura hoffmanni Kosterin, 2015

Figs 2 E–F, 3 G–I, 4 G–H, 5 F, 16 D, 17

Material examined

VIETNAM – Lam Dong Province • 1 ♂; Da Lat; 16 Apr. 2016; T. Kompier leg.; TKC • 3 ♂♂; Bao Loc , Da Ton; 22 Apr. 2016; Q.T. Phan leg.; ZCDTU 2016042210-ODO . – Kon Tum Province • 3 ♂♂; Kon Plong District, Mang Canh ; 22 Jun. 2017; Q.T. Phan leg.; ZCDTU 2017062202-ODO . – Dak Lak Province • 1 ♂; Chu Yang Sin National Park ; 18 May 2018; Q.T. Phan leg.; ZCDTU 2018051802-ODO . – Dak Nong Province • 3 ♂♂; Nam Nung Nature Reserve ; 25 Nov. 2019; Q.T. Phan leg.; ZCDTU 2019112502-ODO .

Diagnosis

Male resembling P. coerulescens with blue markings on head, thorax, abdomen, appendages. Male easily distinguished from P. coerulescens by markings of abdomen tip: small blue dot on S9 and S10 blue on dorsum ( Fig. 3 G–H) while S8–10 largely blue in P. coerulescens ( Fig. 3 A–B). Female very similar to male in body colouration, including green tones ventrally; antehumeral stripes narrow (Fig. F). Structure, shape of female posterior pronotal lobe of prothorax similar in these species but lobes converging, enclosing roundish space, in P. hoffmanni ( Fig. 5F ), not converging, enclosing semicircular space, in P. doisuthepensis ( Fig. 5C ).

Remarks

This species was described from Mondulkiri Province in Cambodia close to the border of Vietnam ( Kosterin 2015) and has been recorded from Lam Dong and Dong Nai Provinces of South Vietnam ( Kosterin 2016). Yokoi & Souphanthong (2014) provided colourful photos of two bluish Prodasineura

species in Laos that resemble P. hoffmanni ( Prodasineura sp.1 and sp. 2 in Yokoi & Souphanthong 2014: 34). Therefore, it is likely that P. hoffmanni occurs in Laos as well.

Distribution

Vietnam ( Fig. 17 ): Kon Tum (Kon Plong District), Dak Lak (Chu Yang Sin National Park), Dak Nong (Nam Nung Nature Reserve), Lam Dong (Bao Loc District and Da Lat) and Dong Nai (Cat Tien National Park) Provinces ( Kompier 2019; Kosterin 2016; this study).

Figures

Fig. 2. Prodasineura Colwey, 1934 spp., head and thorax, lateral view (A, C, E: ♂, B, D, F: ♀) A–B. P. coerulescens (Fraser, 1932), ZCDTU 2016100801-ODO. C–D. P. doisuthepensis Hoess, 2007, ZCDTU 2017062201-ODO. E–F. P. hoffmanni Kosterin, 2015, ZCDTU 2017062202-ODO (E). Fig. 2F is modified from Kosterin (2015: fig. 2a), from Dak Dam village, Mondulkiri Province, Cambodia. Images not to scale.

Fig. 3. Prodasineura Cowley, 1934 spp., males. A–B, E. P. coerulescens (Fraser, 1932), ZCDTU 2016100801-ODO. C–D, F. P. doisuthepensis Hoess, 2007, ZCDTU 2017062201-ODO. G–I. P. hoffmanni Kosterin, 2015, ZCDTU 2017062202-ODO. A, C, G = tip of abdomen, dorsal view; B, D, H = tip of abdomen, lateral view. E–F, I: Genital ligula, oblique-ventral view. Images not to scale.

Fig. 4. Prodasineura Cowley, 1934 spp., females. A–C. P. coerulescens (Fraser, 1932), ZCDTU 2016100801-ODO. D–F. P. doisuthepensis Hoess, 2007, ZCDTU 2017062201-ODO. G–H. P. hoffmanni Kosterin, 2015, ZCDTU 2017062202-ODO. A, D = prothorax, lateral view; B, E, G = prothorax, dorsal view; C, F, H = tip of abdomen, lateral view (Fig. 4G–H is modified from in Kosterin 2015: fig. 4c, h). Images not to scale.

Fig. 5. Posterior pronotal lobe of prothorax of Prodasineura Cowley, 1934 spp., females. A–B. P. autumnalis (Fraser, 1922), lateral and dorsal views. C. P. doisuthepensis Hoess, 2007, dorsal view. D–E. P. coerulescens (Fraser, 1932), lateral and dorsal views. F. P. hoffmanni Kosterin, 2015, dorsal view. (Fig. 5C, F is modified from Kosterin 2015: fig. 3c–d). Images not to scale.

Fig. 16. Habitat of Prodasineura Cowley, 1934 spp. in Vietnam. A. Gia Trang stream in Chu Mom Ray National Park, home of P. doisuthepensis Hoess, 2007 and P. verticalis Selys, 1860. B. Typical stream where P. lancastrei sp. nov., P. autumnalis (Fraser, 1922) and P. croconota Ris, 1916 occur, in Pu Mat National Park. C. Open limestone stream in Tan Hoa Commune, Minh Hoa District of Quang Binh Province with three species: P. autumnalis, P. kong sp. nov. and P. coerulescens (Fraser, 1932) coexisting. D. Habitat of P. hoffmanni Kosterin, 2015 and P. autumnalis in Mang Canh, Kon Plong District of Kon Tum Province.

Fig. 17. Distribution map of Prodasineura Cowley, 1934 spp. in Vietnam (blue group species including the blackish P. autumnalis (Fraser, 1922)). (●) P. autumnalis. (●) P. coerulescens (Fraser, 1932). (●) P. doisuthepensis Hoess, 2007. (●) P. hoffmanni Kosterin, 2015.