Telosticta gading, 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 : 379-381

publication ID	https://doi.org/ 10.5281/zenodo.5348617
persistent identifier	https://treatment.plazi.org/id/03DD87E5-FFFC-6146-FED2-FD77FBA29976
treatment provided by	Tatiana
scientific name	Telosticta gading
status	sp. nov.

Treatment

Telosticta gading View in CoL , new species

( Figs. 3E View Fig , 4E, F View Fig , 5D, J View Fig , 6D View Fig , 7D View Fig , 8D View Fig , 20 View Fig )

Material examined. — Holotype: male (SAR07_8_PST247), Malaysia, Sarawak, Kuching division, Gunung Gading National Park, trailside on Gunung Gading, 100–200 m, 1 Oct.2008, coll. RAD, to be deposited in RMNH.

Paratypes (all from same location as holotype at small streams or by trail up Gunung Gading, all coll. RAD): 5 males (SAR06_ PST18–22), 9 Jan.2006 ; male (SAR08_PST248), 1 Oct.2008. Paratypes currently in collection RAD , examples to be deposited in BMNH and ZRC.

Diagnosis. — The male of T. gading is distinguished from all other species of Telosticta except T. dupophila , T. santubong and T. serapi by the short lateral processes of the posterior pronotal lobe. From the other species with short lateral processes it is easily separated by its much longer antehumeral stripes.

Etymology. — gading , a noun in apposition. Named for the type locality, Gunung Gading in the National Park of the same name.

Description of holotype male. — Head: Labium pale except for end hooks of labial palps, which are brown. Labrum pale blue except narrowly along free margin, where shining black. Anteclypeus pale blue, postclypeus shining black. Mandible bases pale blue in corner by clypeus, dark below, genae black except narrowly beside mandible bases, where obscurely pale. Vertex and frons bronzy black, occiput shining black. Ratio of width of compound eye to width of vertex measured at level of lateral ocelli over 9/10. Lateral extremities of transverse occipital carina angulated and prominent. Ocelli whitish. Antennae with scape dark brown, greyish at top, and pedicel greyish, brown at top, flagella missing.

Thorax: Prothorax with propleuron pale with a large almost square dark brown mark in upper rear part. Pronotum with anterior lobe pale except for a small dark marking dorsally just behind the anterior carina, median lobe brown, becoming paler laterally. Posterior lobe mostly black, hind margin simple, lateral processes very short, rounded with a narrow stalk ( Fig. 3E View Fig ). Synthorax: Mesepisternum black, with a pair of narrow pale blue antehumeral stripes, occupying ca 3/5 of the length ( Fig. 4E View Fig ). Antealar triangles black. Mesepimeron black. Metepisternum largely yellowish cream with a black band extending from the antealar carina to just before the spiracle. Metepimeron largely pale, but black below metepleural suture for much of its length. Venter of synthorax pale. Legs: each with coxa and trochanter pale, femur pale with extensive grey and black markings, black above tibia. Tibia dark immediately below femur, becoming pale brown lower. Tarsi brownish. Wings: 15 Px in Fw, 14 Px in Hw. Arculus distal to Ax2. Vein ab present. R 4 arising at subnodus in Fw, distal to subnodus in Hw, IR 3 joined to it by a short stalk. Pterostigma approximately trapezoidal with costal side slightly shorter than anal side, and proximal side slightly shorter than distal side, greyish brown with narrow white border, covering slightly more than one underlying cell.

Abdomen: Largely dark brown, darkening to rear. S1 brown above and behind posterior carina, pale below. S2 with a pale basal annulus, broadly interrupted dorsally, laterally this extending towards, but not quite reaching, the posterior carina as a pale wedge. S3–6 with a narrow pale basal annulus, broadly interrupted along the dorsal midline, S7–8 similar, but basal annulus absent, replaced by an obscure yellowish brown basal lateral marking. S9 largely pale blue above, this expanded laterally in apical half, otherwise dark brown and black below ( Fig. 5D, J View Fig ). S10 black. Anal appendages ( Figs. 6D View Fig , 7D View Fig , 8D View Fig ) largely dark brown and black. Superior appendage ca 2.5 times the length of S10, slender and slightly expanded outwards at tips in dorsal view, with interior projection at just over one-quarter length, dorsal projection present as a rounded interior swelling ( Fig. 6D View Fig ), not visible in lateral view. In lateral view bent downwards abruptly but gently in apical half, slightly dorsal-ventrally expanded just after the down-turn and hollowed on the exterior surface ( Fig. 7D View Fig ). Inferior appendage shorter than superior, with the scoop long, strap-like in ventral view ( Fig. 8D View Fig ), and the spine directed inwards, upwards and strongly to the rear, not visible in ventral view.

Measurements (mm): Abdomen without anal appendages 43.5, superior anal appendages ca 1.25, Hw 23.

Female. — Unknown

Variation in paratypes. — The only significant variation in the paratypes is in the length of the antehumeral stripes; in

most of the paratypes they are longer than in the holotype (e.g., Fig. 4F View Fig ), but in some cases they are interrupted near their ends, with the terminal part irregular and/or indistinct. The abdomen of the holotype is a little longer than that of any of the paratypes.

Measurements (mm): Abdomen without anal appendages 40–43, Hw 21.5–23.5.

Remark. — T. gading is the largest of the species with short lateral processes on the posterior pronotal lobe of the male.

Biological notes. — Males have been found at low densities at small high gradient streams in mixed dipterocarp forest, or perched at the side of a trail near such streams.

Distribution. — Known only from Gunung Gading in west Sarawak ( Fig. 20 View Fig ).