Erythrodiplax corallina (Brauer)

Garré, Analía, Muzón, Javier & Ardohain, Diego M., 2008, Description of the final instar larvae of Erythrodiplax atroterminata Ris and E. corallina (Brauer) (Odonata: Libellulidae), Zootaxa 1896, pp. 45-50 : 46-49

Erythrodiplax corallina (Brauer)

Description of the final instar larva ( Figs. 8–14 )

Head. Pale, with diffuse dark pattern on dorsum, setose; 2.4 times as wide as long. Occiput with four pale stripes, posterior margin concave. Mandibular formula ( Figs. 8–9 ): L 1 2 3 4 0 a b / R 1 2 3 4 y a b. Labium ( Fig. 10–11 ): articulation of pre- and postmentum between second and third coxae; prementum pale, anterior margin slightly crenulated, ligula obtuse, ratio of maximum width to maximum length 1.4, lateral setae 12 or 11. Labial palp with 8 setae; anterior and inner margins without crenulations, with four setae at labial palp articulation.

Thorax. Pale. Wing pads reaching posterior margin of abdominal segment VI; femora with two annular dark bands, one sub-basal and one sub-apical.

Abdomen. Brownish, lateral spines on segments VIII and IX brown with a transverse pale stripe at 0.3 from base, ratio of spine length of segments VIII and IX to maximum length of corresponding segment 0.9 / 0.33 (reared specimen) and 0.42 / 0.3 (reared specimen) respectively ( Fig. 12 ). Paraprocts ( Figs. 13–14 ) nearly four times as long as segment X; ratio relative to paraprocts: epiproct 1, cerci 1. Epiproct wide at base, apex acute.

Measurements (in mm; mean and standard deviation of exuviae in square brackets): Head maximum length: 3.25 + 0.09 [3.1 + 0.04]; head maximum width: 4.78 + 0.12 [4.7 + 0.12]; prementum maximum length: 3.76 + 0.04 [3.99 + 0.04]; prementum maximum width 4.43 + 0.09 [4.36 + 0.04]; labial palp maximum length: 2.36 + 0.47 [2.72 + 1]; labial palp maximum width: 2.1 + 0.47 [3.47 + 1.7]; movable hook length: 0.5; inner wing pads: 5.26 + 0.18 [5.2 + 0.17]; length of femora III: 4.9 + 0.13 [4.9 + 0.14]; length of tibiae III: 5.5 + 0.07 [5.5]; length of abdominal terga: VI, 1.1 + 0.2 [1 + 0.03]; VII, 1 + 0.28 [1 + 0.3]; VIII, 0.9 + 0.24 [0.9 + 0.3]; IX, 0.7 + 0.2 [0.6 + 0.2]; X, 0.2 + 0.05 [0.2 + 0.1]; width of abdominal terga: VI, 5.5 + 1.3 [5.3 + 1.8]; VII, 5.4 + 1.3 [5.3 + 1.8]; VIII, 4.9 + 1.8 [4.8 + 1.6]; IX, 4 + 0.9 [3.7 + 1.2]; X, 1.6 + 0.4 [1.6 + 0.5]; lateral spines on abdominal segment VIII: 0.3 [0.3]; on segment IX: 0.3 [0.3]; cerci: 0.83 + 0.05 [0.83 + 0.057]; paraprocts: 0.83 + 0.05 [0.83 + 0.057]; epiproct: 1.13 + 0.05 [1.13 + 0.05].

Figures

FIGURES 8 – 14. Final stage larva of Erythrodiplax corallina (Brauer): 8, left mandible, inner view; 9, right mandible, inner view; 10, prementum, dorsal view; 11, right labial palp, dorsal view; 12, lateral spines on terga VIII – IX; 13, terminalia, lateral view; 14, terminalia, dorsal view. Scales 0.5 mm.