Lestes curvatus, Belle, 1997

Belle, J., 1997, The genus Lestes (Odonata: Lestidae) Leach, 1815, in Surinam, Zool. Med. Leiden 71 (11), pp. 89-103 : 92-93

Lestes curvatus spec. nov.

( figs 4 , 14-15 , 26 , 33 )

Material.— Surinam: District Marowijne, Wia Wia (km 5.8-5.2, swamp in forest), 16.xi.1948, 1 ♀ (no. 2830) ; same locality (km 12.6, pit in grass at Mauritie ), 26.xi.1948, 2 ♂ (nos. 3912, 3914), 1 ♀ (no. 3913) ; same locality and date (small marsh), 1 ♂ (no. 3907). District Suriname: Coropina Creek, Republiek (swamp Berseba), 23.vi.1957, 1 ♂ (teneral), all specimens paratypes and all D.C. Geijskes leg .; Coropina Creek, Republiek , 26.iii.1957, 4 ♂ (holotype and paratypes) , 3 ♀ (paratypes) , 31.iii.1959, 1 ♀ (allotype) ; Para Creek (upper part), 30.i.1960, 1 ♂ (paratype) ; 13.ii.1960, 2 ♂, 1 ♀ (paratypes) , all J. Belle leg.

Male (holotype).— Total length ca. 40; abdomen 35; hind wing 22.5; costal edge of stigma in fore wing 1.3.

Head.— Brownish-yellow but labrum greenish-white and vertex black.

Thorax.— Prothorax yellowish-brown. Dorsum of pterothorax brown with a pair of large black dorsal spots and two narrow black stripes parallel to median carina, each stripe confluent with inner side of dorsal spot. Lateral sides of pterothorax yellowish-brown but mesepimeron with a black oblong spot about mid-height and a black spot below, and metepisternum black around spiracle. Pectoral colour pattern shaped as shown in fig. 4.

Legs.— Yellowish-brown.

Wings.— Hyaline. Venation dark brown. Stigma brown, its surface granular. Postnodal cross-veins 13-12/12-13 in fore and hind wings, respectively. R3 branching between fourth and fifth Pns or at fifth Pn.

Abdomen.— Segments 1 to 6 yellowish-brown; segment 7 becoming dark brown toward apex; segments 8 and 9 dark brown; segment 10 yellow with brown apical margin. Caudal appendages yellow, shaped as described in the key and as shown in figs 14-15.

Female (allotype).— Total length ca. 41; abdomen 34.5; hind wing 23.5; costal edge of stigma in fore wing 1.5.

Similar to male in characters other than those of sex but labrum brown. Terminal segments of abdomen shaped as described in the key and as shown in figs 26 and 33.

Variation.— The male and female paratypes are very similar to the male holotype and female allotype, respectively. The species is peculiar in not having the usual metallic lustre and in having the aged specimens not or almost not pruinosed.

Etymology.— The specific name curvatus alludes to the strongly curved male superior caudal appendages.

Figures

Fig. 1, Lestes basidens spec, nov.; 2, Lestes mediorufus Calvert; 3, Lestesforficula Rambur; 4, Lestes curvatus spec, nov.; 5, Lestes tenuatus Rambur; 6, Lestes tenuatus Rambur, lectotype; 7, Lestes edentatus spec, nov.; 8, Lestes trichonus spec, nov.; 9, Lestes sublatus Hagen in Selys. 1-9, pectoral colour pattern [12.5 X 0.63],

Figs 14-15, Lestes curvatus spec, nov.; 16-17, Lestes mediorufus Calvert. 14,16, tenth abdominal segment and caudal appendages of male, dorsal aspect [12.5 X 2.5]; 15,17, the same, left lateral aspect [12.5 X 2.5].

Fig. 22, Lestes tenuatus Rambur; 23, Lestes mediorufus Calvert; 24, Lestes edentatus spec, nov.; 25, Lestes forficula Rambur; 26, Lestes curvatus spec, nov.; 27. Lestes trichonus spec. nov. 22-27, terminal segments of female abdomen, left lateral aspect [6.3 x 2.5].

Fig. 28-30, Lestes sublatus Hagen in Selys; 31-32, Lestes forficula Rambur; 33, Lestes curvatus spec. nov. 28, terminal segments of female abdomen, left lateral aspect [6.3 X 2.5]; 29, 31, stigma of right fore wing [6.3 X 2.5]; 30, 32, stigma of right hind wing [6.3 X 2.5]. 33, caudal appendages of female, dorsal aspect [6.3 X 2.5].