Telosticta dupophila ( Lieftinck, 1933 ) Dow & Orr, 2012

Dow, R. A. & Orr, A. G., 2012, Telosticta, A New Damselfly Genus From Borneo And Palawan (Odonata: Zygoptera: Platystictidae), Raffles Bulletin of Zoology 60 (2), pp. 361-397 : 372-377

Telosticta dupophila ( Lieftinck, 1933) , new combination

( Figs. 1C , 3B, C , 4B, C , 5B, H , 6B , 7B , 8B , 21)

Drepanosticta dupophila Lieftinck, 1933: 286–288 , Fig. 2 ; 1954: 34; 1971: 85; Orr, 2003: 38, 69; van Tol, 1992: 23, 88, 99, 241; van Tol et al., 2009: 8, 18, 36

Drepanosticta ? dupophila – Dow & Reels, 2010: 15, 18

Material examined. — Holotype: male (JvT3034), Indonesia, Kalimantan, Montrado, between Pakmongtheo and Pandjaoa, 3 Apr.1932, coll. L. Coomans de Ruiter , in RMNH.

Others (all from Malaysia, Sarawak, Kuching Division , currently in collection RAD unless noted otherwise): 2 males, Kubah National Park , Matang Wildlife Centre, tiny swampy low gradient forest stream on the Matang Wildlife Centre trail system, ca 75 m, 17 Mar.2005, coll. RAD ; male, same location, 25 Jan.2006, leg RAD ; male, same location, 13 Sep.2009, leg RAD ; 2 males, same location, 2 Sep.2011, coll. RAD ; male, Bako National Park , forest stream just below heath, 26 Aug.1980, coll. D. R. Paulson, in coll. Paulson; male, same national park, small streams in Kerangas forest, ca 120 m, 23 Mar.2005, coll. RAD , in RMNH; male, same location, 24 Mar.2005, coll. GTR; 2 males, same location and date, coll. RAD ; 2 males, same location, 25 Mar.2005, coll. RAD ; 2 males, 25 May.2005, coll. RAD ; 2 males, Kuching city, Sama Jaya Nature Reserve, small stream in highly disturbed Kerangas forest, 4 Oct.2011, coll. RAD .

Diagnosis. — Readily distinguished from all other species of Telosticta except T. santubong and T. serapi by its very

short antehumeral stripes and short lateral processes of the posterior pronotal lobe. Separated from T. santubong and T. serapi by the basal position of the interior projection of the superior anal appendages.

Descriptive notes. — Telosticta dupophila was previously only known from the holotype male. The female remains unknown. Lieftinck (1933) failed to mention the lateral processes of the posterior pronotal lobe; in the holotype of T. dupophila these are relatively short, reaching less than half the distance from their origin to the lower margin of the propleuron ( Fig. 3B ). The ratio of the width of compound eye to width of vertex measured at level of lateral ocelli is over 9/10. Lieftinck’s description of the colouration of abdominal segment 8 is possibly a little misleading, he states “Segm. 8–9 wholly blue, save for a transverse, black stripe along the base of 8, confined to the dorsum, and produced a little behind in the middle”; most of the basal half of the dorsum of S8 is now missing in the holotype, but what remains suggests a broad black rearwards spur reaching to ca one third of the length of the segment. Individuals from Sarawak typically differ from the holotype in the shape of the lateral process of the posterior pronotal lobe (e.g., Fig. 3C ) and in the extent of the blue markings on S8 ( Fig. 5B, H ), which are present laterally but only extend onto the dorsum in the apical half or one third, if at all, and normally remaining broadly separated there, although in a few individuals they meet just before the end of the segment. However the lateral processes are variable in shape in the Sarawak specimens, in one individual agreeing with those of the holotype and very reduced or even absent in some individuals. The lateral extent of the blue S8 marking is also variable, running the whole length of the segment in some specimens but only present in the apical one third in others. There are small differences in the shape and length of the antehumeral markings between the holotype and individuals from Sarawak (e.g., Fig. 4B, C ) but these markings also show some variation within individual populations. The anal appendages of the Sarawak specimens are identical to those of the holotype; the small and variable differences noted above do not appear to be sufficient to warrant even subspecies status for the Sarawak populations.

Measurements (mm): Holotype:Abdomen without appendages ca 36.5, Hw 21.5. Wings with 12 Px in Fw, 11–12 in Hw. Sarawak specimens: Abdomen without appendages 31–36, Hw 18–21.5. Wings with 11–13 Px in Fw, 10–12 in Hw.

Remarks. — Van Tol et al. (2009: 36), writing about Protosticta aff. feronia (= T. dayak ), stated that “it is morphologically very similar to Drepanosticta dupophila… Based on the fact that both nominal species are syntopic and share all morphological characters except wing venation, we predict that both names are synonyms”. However, with detailed study and more material available than van Tol had, it is clear that T. dupophila is a distinct species from both T. feronia and T. dayak , with consistent differences in structural characters and markings from both of these species.

Biological notes. — The habitat at the type locality is described as “swampy forest” in Lieftinck (1933) and on the label as “strook vochtig bosch”: a “strip of moist forest”. At Bako National park in Sarawak it is found at small streams in Kerangas forest; in places this could be described as swampy. At Sama Jaya Nature Reserve it has been found on one tiny swampy stream in disturbed Kerangas forest. At Kubah National park it has been found on small low gradient streams in semi-alluvial forest; again this could be described as swampy. It appears to favour lower gradient streams than the closely allied T. serapi ; at Kubah they occur within 100 m of each other but on streams differing by gradient. At Bako it is quite a common species, males are found perched at the side of streams.

Distribution. — Fig. 21; T. dupophila is known from north west Kalimantan in the vicinity of Singkawang and from west Sarawak, where populations are known at Bako and Kubah National parks and at Sama Jaya Nature Reserve within the city limits of Kuching.

Figures

Fig. 1. A, head of T. feronia holotype; B, lateral view of synthorax of T. feronia holotype; C, penis of T. dupophila (SAR06_PST135), scale bar = 50 μm; D, anal appendages and ovipositor of T. serapi paratype female (SAR06_PST61).

Fig. 3. Western species (holotypes unless noted otherwise), lateral processes of male posterior pronotal lobe:A, T. bidayuh; B, T. dupophila holotype; C, T. dupophila Bako (SAR05_PST49); D, T. feronia; E, T. gading; F, T. santubong; G, T. serapi.

Fig. 4. Western species (holotypes unless noted otherwise), male antehumeral markings: A, T. bidayuh; B, T. dupophila; C, T. dupophila Bako (SAR05_PST49); D, T. feronia paratype (JvT 13481); E, T. gading; F, T. gading paratype (SAR06_PST21); G, T. santubong paratype (SAR05_PST59); H, T. serapi.

Fig. 5. Western species (holotypes unless noted otherwise), male terminal abdominal segments. Dorsal view: A, T. bidayuh; B, T. dupophila Bako (SAR05_PST50); C, T. feronia; D, T. gading; E, T. santubong; F, T. serapi. Lateral view: G, T. bidayuh; H, T. dupophila Bako (SAR05_PST50); I, T. feronia paratype (JvT 13481); J, T. gading; K, T. santubong; L, T. serapi.

Fig. 6. Western species (holotypes unless noted otherwise), male anal appendages, dorsal view: A, T. bidayuh; B, T. dupophila Bako (SAR05_PST49); C, T. feronia; D, T. gading; E, T. santubong; F, T. serapi.

Fig. 7. Western species (holotypes unless noted otherwise), male anal appendages, lateral view: A, T. bidayuh; B, T. dupophila Bako (SAR05_PST49); C, T. feronia; D, T. gading; E, T. santubong; F, T. serapi.

Fig. 8. Western species (holotypes unless noted otherwise), male right inferior anal appendage, ventral view: A, T. bidayuh; B, T. dupophila Bako (SAR05_PST49); C, T. feronia; D, T. gading; E, T. santubong; F, T. serapi.

Fig. 2. Dorsal lateral view of male anal appendages of T. dayak paratype (SAR05_PST17), right superior and left inferior appendage removed: a – interior projection; b – dorsal projection; c – stem; d – spine; e – scoop.