Prodasineura laidlawi (Forster in Laidlaw, 1907)

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 : 12

Prodasineura laidlawi (Forster in Laidlaw, 1907) - excluded species

Fig. 8F

Diagnosis

Bluish Prodasineura that resembles P. coerulescens and P. hoffmanni with thin antehumeral stripe, bluish abdominal tip, appendages in males. Bluish marking covers most of S9, extends to S 8 in P. laidlawi while only dorsal area of S9 blue in P. coerulescens and P. hoffmanni ( Kosterin 2015) . Female easily separated from P. coerulescens and P. hoffmanni by posterior pronotal lobe of prothorax having large rounded plate mid-centrally ( Fig. 8F ) rather than two separate ear-like processes, disposed laterally in P. coerulescens ( Fig. 5D ), midposteriorly in P. hoffmanni ( Fig. 5F ).

Remarks

Asahina (1969) reported P. laidlawi from Dinh Quan District of Dong Nai Province, but included no figures of its structures. Other studies in Cat Tien National Park and Dinh Quan District of Dong Nai Province record the similarily marked species P. coerulescens but not P. laidlawi ( Do & Dang 2007; Kompier 2019; this study). We suggest that the male of P. laidlawi as identified by Asahina (1969) was probably P. coerulescens . The occurence of P. laidlawi in Vietnam is also unlikely given the known range of P. laidlawi , which has been reported from Malaysia ( Orr 2005) and Thailand ( Asahina 1983).

Figures

Fig. 8. Prodasineura Cowley, 1934 spp., females. A–C. P. croconota Ris, 1916, ZCDTU 2017060802- ODO. D–E. P. verticalis Selys, 1860, ZCDTU 2018030611-ODO. F. P. laidlawi (Forster in Laidlaw, 1907), modified from Asahina (1983: fig. 22). A, G–F = prothorax, lateral view; B, D = prothorax, dorsal view; C, E = tip of abdomen, lateral view. 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.