Drepanosticta wildermuthi, Villanueva & Schorr, 2011

Villanueva, Reagan Joseph T. & Schorr, Martin, 2011, Two new damselfly species from Polillo Island, Philippines (Odonata: Platystictidae), Zootaxa 3017, pp. 46-50 : 47-48

Drepanosticta wildermuthi spec. nov.

( Figures 1–2 )

Villanueva 2010a: Drepanosticta sp.n.; Villanueva 2010b: Drepanosticta sp.n.

Material studied. Holotype 3, Pinaglubayan, Polillo, Polillo Is., Philippines, 27.iii.2010, Reagan Joseph T. Villanueva leg. (to be deposited in RMNH). Paratype 1 3, same label as the holotype, ( RJTV). Other material 1 3 (not included in paratype due to poor condition), Salipsip, Polillo, Polillo Is., Philippines, 23.iv.2009, RJTV leg., ( RJTV).

Diagnosis. This species belongs to the Drepanosticta moorei group. It differs from D. moorei van Tol & Müller by the absence of elongated anterior lobe processes of the prothorax, and from D. luzonica van Tol by the very broad posterior lobe of the prothorax and its smaller size.

Etymology. Named after Hansruedi Wildermuth, Rüti, Switzerland on the occasion of his 70th birthday on 27 February 2011. Dr. Wildermuth is a leading European odonatologist involved in the ecology and biology of Odonata with special emphasis on Corduliidae and dragonfly conservation.

Description of male holotype. Head: Labium brownish except for blackish basal portion. Mandible with whitish base and blackish apices. Labrum and anteclypeus white except for black outer margin of labrum. Rest of head black except for dark brown antennae. Transverse occipital carina well developed with lateral extremities not pronounced.

Thorax: Prothorax yellow except for blackish streaks at middle portion of posterior lobe. Anterior lobe short and erect, its lateral portion shortly elongated and twisted, depressed in middle. Posterior lobe ( Fig. 1 ) equipped with large lateral processes, inner portion raised dorsad, and outer part broadly rounded and directed caudad. Synthorax with greenish to blackish mesepisternum and mesepimeron. Broad yellow stripe occupies metepisternum except for brownish posterior margin. Metepimeron with anterobasal half blackish brown, posterodistal half white. Legs entirely yellow brown except for brown spines and black-tinged knees. Wings hyaline with brown veins. Ac and Ab veins present, forming characteristic Y. Arculus arising beyond Ax2; Px 11/ 10 in Fw and Hw respectively; R4+5 at subnodus and IR3 a little further distad. Pt light brown, rectangular.

Abdomen: Generally blackish brown to black except for yellow ventrolateral portion of S1 and whitish basal rings on S3–7. Cerci ( Fig. 2 ) dark brown and dorsoventrally flattened. Basal one-fourth directed dorsad in lateral view, distally ventrocaudad with large ventral tooth in middle. In dorsal view, apical portion of basal one-fourth twisted such that lateral portion becomes ventral margin, and medial margin occupies dorsum of distal threefourths. Tip smoothly rounded. Paraprocts surpassing cerci, blackish basally and brownish distally. Basal half robust, distally flattened and directed dorsad, then bent ventrad, its rounded tip curved dorsad.

Measurements of holotype: abdomen + cerci 32, Hw 19.

Variation in male paratype. Paraprocts just reach end of cerci on paratype. Paraproct base robust, distal portion subcylindrical and directed dorsocaudad. The last abdominal segment of the third specimen is damaged and cannot be described.

Measurements: abdomen + cerci 30, Hw 19.

Female unknown.

Figures

FIGURES 1 – 2. Drepanosticta wildermuthi. 1. Prothorax oblique lateral view, 2. Cerci lateral view.