Telosticta serapi, 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 : 383-385

publication ID	https://doi.org/ 10.5281/zenodo.5348617
persistent identifier	https://treatment.plazi.org/id/03DD87E5-FFF8-614A-FED6-F9B7FD179955
treatment provided by	Tatiana
scientific name	Telosticta serapi
status	sp. nov.

Treatment

Telosticta serapi View in CoL , new species

( Figs. 1D View Fig , 3G View Fig , 4H View Fig , 5F, L View Fig , 6F View Fig , 7F View Fig , 8F View Fig , 20 View Fig )

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

Material examined. — Holotype: male (SAR07_8_PST343), Malaysia, Sarawak, Kuching division, Matang Range , Kubah National Park, small stream on Gunung Serapi, 100–400 m, 3 Oct.2008, coll. RAD, to be deposited in RMNH.

Paratypes (all from Kubah National Park or just outside the park boundary, all coll. RAD unless otherwise noted, currently in collection RAD unless otherwise noted, examples to be deposited in BMNH and ZRC): 5 males (SAR09_10_PST381–385), female (SAR09_10_PST386), stream at ca 650–700 m on Gunung Serapi, 3 Jun.2010 ; 2 males (SAR09_10_PST368–369), same location, 6 Jun.2010 ; 3 males (SAR09_10_PST392–394), female (SAR09_10_PST395), same location, 28 Jul.2010 ; 5 males (SAR05_PST84–88), small streams on Gunung Serapi below 500 m, 13 Apr.2005; male (SAR05_PST96), same location, 14 Apr.2005 ; 8 males (SAR06_PST57–60, 157–160), female (SAR06_PST61), same location, 21 Jan.2006 ; 4 males (SAR07_8_PST344–347), data as holotype ; 2 males (SAR09_10_PST77–78), same location, 7 Sep.2009 ; female (SAR09_10_PST76), same location and date, coll. SB; male (SAR09_10_PST134), same location, 8 Sep.2009 ; 5 males (SAR07_8_PST171–174, RMNH _INS_ 229022 in ethanol), small streams near Main Trail, 23 Feb.2008 ; 3 males (SAR09_ 10_PST59–61), female (SAR09_10_PST62), same location, 28 Oct.2009 ; 10 males (SAR05_PST69–72, 74–78, 89), female (SAR05_PST73), small streams near Ulu Rayu Trail, 1 Jun.2005; 6 males (SAR07_8_PST303–308), small streams on Belian Trail, 15 Sep.2008; male (SAR09_10_PST387), same location, 25 Apr.2010 ; 2 males (SAR09_10_PST45–46), small tributary to Sungai Rayu crossed by Matang Wildlife trail system, 13 Sep.2009.

Diagnosis. — Readily distinguished from all other species of Telosticta except T. dupophila and T. santubong by its very short antehumeral stripes and short lateral processes of the posterior pronotal lobe. Separated from T. dupophila by having the interior projection of the superior appendage less basal and from T. santubong by its well developed interior projection without a clump of long setae.

Etymology. — serapi , a noun in apposition. Named for the type locality, Gunung Serapi in the Matang Range.

Description of holotype male. — Head: Labium pale cream except for end hooks of labial palps, which are brown. Labrum pale blue except along free margin, where shining black. Anteclypeus pale blue, postclypeus shining black. Mandible bases pale blue in corner by clypeus, dark below. Vertex and frons shining metallic greenish-black, occiput shining black. Ratio of width of compound eye to width of vertex measured at level of lateral ocelli ca 9/10. Lateral extremities of transverse occipital carina poorly developed. Ocelli whitish. Antennae with scape brown, grey at top and pedicel pale, brown at top, flagella missing.

Thorax: Prothorax with propleuron pale cream below, black above and along part of the rear margin. Pronotum with anterior lobe pale blue dorsally to whitish laterally, except for a black transverse stripe placed centrally just behind the anterior carina, median lobe pale blue dorsally to whitish, black at rear behind level of central pit. Posterior lobe black, hind margin simple, lateral process ( Fig. 3G View Fig ) reaching less than halfway to the lower margin of the propleuron, with a rounded head after a narrow stem. Synthorax: Mesepisternum black, with a pair of very short pale blue antehumeral markings occupying just less than 1/4 of the length ( Fig. 4H View Fig ). Metepisternum with a broad pale blue stripe in upper part, extending to lower margin of spiracle, tapering towards antealar carina, brown below this. Metepimeron dirty cream, brown below metapleural suture. Venter of synthorax pale. Legs: each with coxa and trochanter pale cream, femur also pale greyish cream, with extensor surface largely black. Tibia with a dark streak on extensor surface below joint and along whole length of flexor surface. Tarsi mostly pale but black before claws, which are brown. Wings: 13 Px in Fw, 12 Px in Hw. Arculus slightly distal to Ax2. Vein ab present. R 4 arising distal to subnodus, 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 prominent white border, covering slightly more than one underlying cell.

Abdomen: Largely pale brown, darkening to rear. S1 white, dark brown behind posterior carina, this intruding dorsally towards base, but poorly defined. S2 largely brown, with a yellowish lateral marking not quite reaching the base of the segment. S3–7 dark brown above, brown to sides, with a narrow pale basal annulus broadly interrupted on dorsum and becoming less well defined on each segment. S7 pale along tergal margin. S8 black above with the apical ca one third blue dorsally and pale along tergal margin, S9 black with the dorsum blue, this extending laterally, S10 largely black ( Fig. 5F, L View Fig ). Appendages ( Figs. 6F View Fig , 7F View Fig , 8F View Fig ) largely dark brown except ventrally basally on inferior appendage, where cream. Superior appendage slightly more than 2.5 times the length of S10, with interior projection at ca 4/10 length ( Fig. 6F View Fig ), the appendage narrowing abruptly immediately afterwards, the projection, which is short and robust, with a broad downwards spur that is clearly visible in lateral view ( Fig. 7F View Fig ) and a whitish upper spur directed rearwards ( Fig. 6F View Fig ). Dorsal projection at the point where the appendage turns down strongly, small and upwards directed. Upper margin of appendage after dorsal projection running straight at ca. 45 degrees to basal section until shortly before the tip which is expanded to rear, the whole down-turned section somewhat expanded and flattened, the tip broad and rounded in lateral view ( Fig. 7F View Fig ). Inferior appendage almost as long as superior, robust, the scoop not much expanded, only slightly broader than the stem in ventral view ( Fig. 8F View Fig ), turned up slightly at the tip, the spine robust and directed inwards, upwards and slightly rearwards.

Measurements (mm): Abdomen without anal appendages 37.5, superior anal appendages ca 1.25, Hw 21.5.

Description of female paratype. — Based on SAR06_PST61, as male except as noted.

Head: basal half of labrum blue, rest black.

Thorax: posterior pronotal lobe without lateral process. Synthorax very similar to holotype male, but ground colour of sides brown rather than black and antehumeral marking slightly longer. Wings almost identical to holotype male, with 13 Px in Fw , 12 in Hw, but pterostigma darker .

Abdomen: S8 dark above with a small, poorly defined, blue dorsal-lateral mark, S9 dark dorsally, brown laterally, with large but poorly defined blue patch dorsal-laterally in the apical half, S10 dark above, pale at sides. Superior anal appendages ca same length as S10. Valves of ovipositor mostly pale, their tip only a little beyond the level of the tips of the superior anal appendages.

Measurements (mm): Abdomen without appendages or ovipositor 30.5, Hw 20.5, ovipositor ca 1.5.

Variation in paratypes. — Males: The extent of dark colouration on the propleuron and middle pronotal lobe is somewhat variable and there is a small amount of variation in the length of the antehumeral stripes and the lateral processes of the posterior pronotal lobe. The blue marking on S9 is often reduced compared to the holotype and in one paratype it is almost circular. The dorsal projection of the superior appendage is frequently more prominent in lateral view, but this is largely a matter of how the appendages are lying. In one specimen the upper spur of the interior projection of the superior appendage is only developed on one side, and is not directed rearwards; in the smallest paratype the upper spur is minute.

Females: In two of the paratypes there are rudimentary lateral processes on the posterior pronotal lobe.

Measurements (mm): Males: Abdomen without anal appendages 32.5–39, Hw 19–23.5. Wings with 12–14 Px in Fw, 11–12 in Hw. Females: Abdomen without appendages or ovipositor 30–35, Hw 20–22.5. Wings with 13–14 Px in Fw, 11–13 in Hw.

Remarks. — The female is associated with the male by reasonable supposition based on its co-occurrence with males and similarity of markings and colouration.

Biological notes. — T. serapi is a common species where it occurs. Males are found at small, high gradient streams, where they perch at the streamside. On Gunung Serapi it is frequently found at forest edge drains running beside the road that runs up the mountain, and which divert small streams that would otherwise run across the road. It frequently occurs together with T. bidayuh and Drepanosticta rufostigma .

Distribution. — T. serapi is known only from the Matang range in Kuching Division, west Sarawak ( Fig. 20 View Fig ).