Devadatta tanduk, Dow, Rory A., Hämäläinen, Matti & Stokvis, Frank R., 2015

Dow, Rory A., Hämäläinen, Matti & Stokvis, Frank R., 2015, Revision of the genus Devadatta Kirby, 1890 in Borneo based on molecular and morphological methods, with descriptions of four new species (Odonata: Zygoptera: Devadattidae), Zootaxa 4033 (3), pp. 301-349 : 337-339

publication ID	https://doi.org/ 10.11646/zootaxa.4033.3.1
publication LSID	lsid:zoobank.org:pub:2576327B-E225-467E-BBF4-B5E5A6A64649
DOI	https://doi.org/10.5281/zenodo.6106906
persistent identifier	https://treatment.plazi.org/id/CE0B87FE-553E-FF9E-FF75-9104CDA2FDE2
treatment provided by	Plazi
scientific name	Devadatta tanduk
status	sp. nov.

Treatment

Devadatta tanduk spec. nov.

( Figs. 1 View FIGURE 1 , 2 View FIGURE 2 , 3 View FIGURE 3. 16 S , 4 View FIGURE 4 , 5 View FIGURE 5. 28 S , 6 View FIGURE 6 , 7 View FIGURE 7 , 13 View FIGURES 8 – 13 , 19 View FIGURES 14 – 19 , 25 View FIGURES 20 – 25 , 28, 29 View FIGURES 26 – 29 , 45 View FIGURES 40 – 45 , 51 View FIGURES 46 – 51 , 57 View FIGURES 52 – 57 , 63 View FIGURES 58 – 63 , 67 View FIGURES 64 – 67 , 73 View FIGURES 68 – 73 , 76 View FIGURE 76 )

Devadatta p. podolestoides View in CoL [nec Laidlaw, 1934];— Hämäläinen 1994: 79 (part: Kipungit waterfall area, Poring).

Type material. Holotype: 1 ♂ (SAB12_ AMP 26, RMNH.INS.507683), small streams by trail to Langanan waterfall, Poring Hot Springs, Kinabalu National Park, 11 ix 2012, leg. R.A. Dow, in RMNH.

Paratypes (28 ♂ 3 ♀): Sabah, Malaysia: 1 ♂, Kipungit waterfall stream, Poring Hot Springs, Kinabalu National Park, 17–20 iv 1994, leg. M. Hämäläinen, in coll. Hämäläinen; 13 1 ♂ 2 ♀, forest streams around hot springs and Kipungit waterfall, same area, 23–28 iv 2000, leg. M. Hämäläinen, in coll. Hämäläinen; 1 ♂, by trail on way to Langanan waterfall, same area, 27 iv 2000, leg. M. Hämäläinen, in coll. Hämäläinen; 1 ♀ (SAB12_ AMP 30: RMNH.INS.507658), stream running into Bamboo Garden, same area, 10 ix 2012, leg. R.A. Dow; 2 ♂ (SAB12_ AMP 5, 29: RMNH.INS.507665), data as holotype; 1 ♂ (SAB12_ AMP 19), same location, 12 ix 2012, leg. R.A. Dow; 3 ♂ (SAB12_ AMP 16, 34, 31: RMNH.INS.507753), stream below Kimamabang waterfall, Inobong, Crocker Range National Park, 18 ix 2012, leg. R.A. Dow; 1 ♂ (SAB12_ AMP 12), same location, 19 ix 2012, leg. R.A. Dow; 3 ♂ (SAB12_ AMP 17–18, 33: RMNH.INS.507773), same location, 21 ix 2012, leg. R.A. Dow; 3 ♂ (SAB12_ AMP 13–15), Batu Dinding stream system, same area, 20 ix 2012, leg. R.A. Dow.

Etymology. Tanduk , a noun in apposition, a Malay word for horn/horns, used here in reference to the horns on the female prothorax.

Diagnosis. A typical member of the podolestoides -group. In the known populations both sexes can be distinguished from those D. aran by the colour of the venter of the synthorax, extent of pale markings on the head and number of Ax up to the arculus. Females can also be separated from those of D. aran by the longer horns on the middle pronotal lobe.

Description of holotype male. Head: Labium mostly pale. Mandible and genae mostly shining dark brown. Labrum, clypeus, frons and vertex to level of lateral ocelli black with metallic green reflection, antennae with scape with pale, indistinct, anterior streak, otherwise mostly dark brown and black. Remainder of dorsum of head matte black with extensive pale areas on protruding postocular lobes, joined by narrow pale band ( Fig. 19 View FIGURES 14 – 19 ); underside extensively pale.

Thorax: Pronotum and propleuron largely black, with pale streak below notopleural suture, bright pale marks laterally on anterior pronotal lobe, rear of middle pronotal lobe becoming brown centrally, along entire free margin of posterior pronotal lobe. Dorsum of synthorax matte black, elongate pale mark between arms of anterior bifurcation of middorsal carina. Synthorax laterally mostly matte black, with pale marks as follows ( Fig. 25 View FIGURES 20 – 25 ): along lower side of mesopleural suture short bright streak and small bright patch near the antealar carina, large pale patch adjacent to mesokatepisternum, pale mark around interpleural suture adjacent to posterior coxa narrowly separated from bright, narrow, irregular pale streak running length of the suture from just before the spiracle, small bluish subtriangular area below metapleural suture adjacent to antealar carina, indistinct, larger, pale area at other end of metapleural suture and continued narrowly beneath suture for a distance. Area between metapleural carina and venter dark brown. Venter of synthorax pale centrally, greyish brown laterally and on meteposternum ( Fig. 28 View FIGURES 26 – 29 , with white pruinosity. Some whitish pruinosity also present on metepleural suture and lower margin of metepimeron. Legs (right posterior missing): Coxae largely dark brown. Trochanters pale with dark marks on extensor surface. Femora brown with two dark grey bands, pale on interior surfaces. Tibiae and tarsi brown. Wings with arculus ca at level of Ax 3, quadrilateral with 2 crossveins (1 in right Fw), cubito-anal space free in all wings, pt brown becoming paler distally. Membrane with slight brownish tint, darker at extreme tips of both wings.

Abdomen: Black above and very dark brown laterally, becoming almost entirely black on terminal 3 segments, S3–8 with broad pale basal ring, interrupted dorsally, smallest on S8. Genital ligula typical for the group, seminal vesicle brown and pale. Cerci black, paraprocts mostly black. Paraprocts extremely short, rounded. Cerci longer than S10, in dorsal view ( Fig. 45 View FIGURES 40 – 45 ) narrowing from base to slightly over half length, where in-turned at less than right angle, apical part slightly expanded. In lateral view ( Fig. 51 View FIGURES 46 – 51 ) narrowing after base and expanding again slightly towards apex. Interiorly deeply excavated from just before half length from base, excavation running under almost to apex, paler inside excavation.

Measurements (mm): Abdomen without anal appendages 38, cerci 1, Hw 33.

Description of female (SAB12_AMP30, RMNH.INS.507658). As male except as noted. Head. Labrum brown. Mandible bases mostly pale brown, genae, postclypeus and much of frons brown, remainder of dorsum of head matte black with postocular lobes extensively pale brown, joined by very distinct pale band along occipital ridge ( Fig. 57 View FIGURES 52 – 57 ). Antennae with anterior yellowish streak on scape.

Thorax: Propleuron mostly dark brown, pronotum ( Fig. 67 View FIGURES 64 – 67 ) brown, large pale bluish marks on anterior lobe only narrowly separated centrally, middle lobe bearing horns, directed upward, inward and rearward. Posterior lobe with narrowly pale along free margin, widest laterally. Dorsum of synthorax brown with mid dorsal carina black, pale mark between arms of anterior bifurcation of mid dorsal carina. Synthorax laterally brown with pale marks in same positions as, but mostly more extensive than in male ( Fig. 73 View FIGURES 68 – 73 ), an additional indistinct pale area present on metepisternum. Venter of synthorax pale with greyish shadowing laterally. Legs missing below trochanters. Wings with arculus at Ax 3 (4 in left Fw), quadrilateral with two crossveins in all wings, pt black, proximally apical ca 2/ 3 mostly pale. The tips of both wings heavily tinted brown to ca distal end pt.

Abdomen: Small pale lateral basal spot on S2. Pale area on S8 reduced to a very narrow annulus. Cerci black, sub triangular, just shorter than S10. Ovipositor short, only reaching beyond S10 to ca level of tips of cerci.

Measurements [mm]: Abdomen without ovipositor and appendages 30.5, Hw 29.5.

Variation in paratypes. Males: aside from typical small variations in the pale markings, there is little difference amongst the male paratypes, except for considerable variation in size. On some specimens there is sparse pruinosity on the lower and ventral ( Fig. 29 View FIGURES 26 – 29 ) parts of synthorax and on coxae. The degree of tinting of the wing membrane varies from entirely absent to deeper than in the holotype and the size of the coloured areas at the wing tips also varies somewhat; it is slightly more extensive in the Fw. One paratype has the arculus at ca Ax 4 in the right Fw, the same specimen has the pale basal mark on S8 very reduced and faded. Two paratypes have a single crossvein in the cubito-anal space of one wing. Quadrilateral usually with 2 crossveins, but in some males there is only one crossvein is some wings, in one male one crossvein in all wings. The cerci of all males (including the holotype) bear small spines; these are highly variable in size and position and non-diagnostic.

The other female paratypes still have their legs, which are coloured as in the male. The arculus is at Ax 3 in all wings, one or two crossveins in the quadrilateral.

Measurements [mm]: Males: abdomen without anal appendages 32–39, Hw 27–34. Females: abdomen without ovipositor or cerci 30.5, Hw 31.5–32.

Remarks. Devadatta tanduk is known only from Mount Kinabalu and the Crocker Range in Sabah, where it is found at small forest streams. The type series of D. tanduk are all from locations within the range of D. aran , which is the more common species at higher altitudes.