Devadatta clavicauda Dow, Hämäläinen & Stokvis, 2015, spec. nov.
Creators: name: Dow, Rory A.
name: Hämäläinen, Matti
name: Stokvis, Frank R.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Amphipterygidae
Devadatta
Devadatta clavicauda

description: Devadatta clavicauda spec. nov.
(Figs. 1, 2, 3, 4, 5, 6, 7, 10, 16, 22, 32, 33, 36, 42, 48, 54, 60, 70, 75)
Devadatta species A;—Dow & Reels 2013: 3, 12 (records western Sarawak);— Dow, Reels & Butler 2013a: 9, 12 (Mount Dulit);— Dow, Reels & Butler 2013b: 11 (Kubah National Park);— Dow & Ngiam 2014: 29 (Ulu Balui);— Dow et al. 2015a: 22 (Kapit);— Dow et al. 2015b: 11 (Usun Apau, all specimens lost).
Devadatta species;— Dow 2012b: 5 –6 (records Gunung Pueh complex).
Devadatta podolestoides [nec Laidlaw, 1934];— Kimmins 1936: 79 (Mount Dulit: part);—Thompson & van Tol 1993: 59, 64, 68 (Sungai Ingei, Brunei);— Thompson 1998: 260;— Dow & Reels 2008: 3 (Gunung Mulu National Park); — Dow & Reels 2009: 13 (Mount Dulit: part);— Dow & Reels 2010: 15 (Kubah: part; Simalajau and Lambir Hills).
Devadatta podolestoides podolestoides [nec Laidlaw, 1934];— Lieftinck 1954: 2 (part);— Kitagawa & Katatani 2013: 55, Figs 53–54 (in Japanese; part? Figs 53–54 at least show D. clavicauda).
Devadatta sp.;— Orr 2001: 173 (Brunei);— Kalkman 2005: 13 (larva, Brunei);— Dijkstra et al 2014: Fig. 3 b, Table 5 (Brunei: RMNH.INS.500720).
Devadatta spp. cf podolestoides;— Dow & Ngiam 2012: 2, 7 (Hose mountains: part).
Type material. Holotype: 1 ♂ (SAR13_14_ DEV 163), Bukit Mina, Bukit Mina Wildlife Corridor, Sarawak Planted Forest Project, Bintulu division, 20 iii 2014, leg. R.A. Dow, to be deposited in RMNH.
Paratypes (302 ♂, 57 ♀). Female used for description: 1 ♀ (SAR11_12_ AMP 59), location as holotype, 1 v 2011, leg. L. Joseph. See appendix for remainder.
Etymology. clavicauda, formed from clava, a club and cauda, tail, referring to the end of the body. Named for the club-shaped ends of the cerci in dorsal view.
Diagnosis. The male is distinguished from all other species of the podolestoides -group by the strongly expanded ends of the cerci. The female has no horns on the middle pronotal lobe.
Description of holotype male. Head: Labium mostly pale. Mandible bases shining brown, genae shining dark brown. Labrum, clypeus, frons and vertex to level of lateral ocelli black with metallic green reflection, antennae with scape with pale anterior streak, otherwise mostly dark brown and black. Remainder of dorsum of head matte black with indistinct brown areas on protruding postocular lobes, joined by indistinct brown band running along occipital ridge (Fig. 16); underside extensively pale.
Thorax: Pronotum and propleuron largely black, with partial pale streak below notopleural suture, pale marks laterally on anterior pronotal lobe, rear of middle pronotal lobe, along free margin of posterior pronotal lobe which is narrowly divided centrally. Dorsum of synthorax matte black with slight bronzy reflection, small pale diamondshaped mark between arms of anterior bifurcation of middorsal carina. Synthorax laterally mostly matte black with slight bronzy reflection, with pale marks as follows (Fig. 22): along lower side of mesopleural suture faint short streak and faint patch near antealar carina, indistinct brown patch adjacent to mesokatepisternum, pale mark around interpleural suture adjacent to posterior coxa, joined to brighter pale area above spiracle, small bluish subtriangular area below metapleural suture adjacent to antealar carina, indistinct, larger, brown area at other end of metapleural suture, indistinct pale area along lower margin of metepimeron, area between metapleural carina and venter pale brown. Venter of synthorax pale except metepisternum where brown (Fig. 32). Legs (left anterior missing): Coxae largely dark brown. Trochanters pale with dark marks on extensor surface. Femora brown with two dark grey bands. Tibiae and tarsi dark brown. Wings with arculus ca at level of Ax 3, quadrilateral with 2 crossveins (1 in left Fw), cubito-anal space free in all wings, pt brown becoming paler distally, this more obvious in Fw. Membrane with a faint brownish tint, extreme tips of both wings darker.
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 light brown. Epiproct prominent. Cerci black, paraprocts brown. Paraprocts extremely short, rounded. Cerci longer than S10, in dorsal view (Fig. 42) narrowing shortly after base, in-turned shortly before half length, then expanding so apical half club-like. In lateral view (Fig. 48) expanded in apical half. Interiorly deeply excavated from shortly after base, excavation not reaching apex, pale inside excavation.
Measurements [mm]: Abdomen without anal appendages 31, cerci 1, Hw 26.
Description of female (SAR11_12_AMP59). As male except as noted. Head. Labrum mostly brown. Most of mandible bases, frons and postclypeus brown, remainder of dorsum of head matte black with postocular lobes dark brown (Fig. 54). Antennae with anterior yellowish streak on scape.
Thorax: Propleuron with extensive whitish pruinosity. Pronotum (Fig. 60) mottled brown, with yellow transverse streak along raised part of anterior lobe, narrow pale yellow band along free margin of posterior lobe, broadly divided centrally. No horns on middle pronotal lobe. Dorsum of synthorax brown with middorsal carina black, small pale mark between arms of anterior bifurcation of middorsal carina. Synthorax laterally (Fig. 70) brown with pale marks brighter than in male, but no paler mark in area adjacent to mesokatepisternum, much more extensive pale mark along interpleural suture. Venter of synthorax largely brown. Wings with quadrilateral with one crossvein in Fw, pt dark brown proximally, apical ca 2/3 mostly pale. Extreme tips of both wings coloured brown.
Abdomen: Brown, basal ring, widely interrupted dorsally, also present on S2, almost absent on S8. Cerci black, subtriangular, ca same length as S10. Ovipositor short, only reaching beyond S10 to ca level of tips of cerci.
Measurements [mm]: Abdomen without ovipositor or cerci 26.5, Hw 25.
Variation in paratypes. In the most western populations (Kuching and Samarahan divisions and Kalimantan Barat) there is tendency for more extensive and brighter pale markings on the head and lateral parts of the synthorax in both sexes; however, this is also the case in occasional individuals from more eastern populations. In the most western populations the metepisternum is pale or greyish (e.g. Fig. 33), this is also quite often the case in individuals from west of the Rajang River and its major tributary the Baleh Rivers and in occasional individuals from the rest of Sarawak and Brunei. Females frequently have a greyish brown colour to the synthorax, paler than that described; this is likely to be immature colouration, but in western populations the synthorax is a lighter brown even in mature individuals. The extent of the coloured area at the wing tip varies from barely present at all to slightly more extensive than in the holotype and described female; that shown for a male paratype in Fig. 36 is typical. A brownish tint over most of the wings is frequently present but is absent in teneral and just post-teneral individuals. The colour of the pterostigma varies from entirely brown to almost entirely pale; this variation is associated with maturity. The arculus in males is at the level of Ax 3–4, very occasionally Ax 5; in females it is typically at Ax 3, occasionally at Ax 4 in some wings. Very rarely in either sex there is a single crossvein in the cubito-anal space in one wing. The cerci of all males (including the holotype) bear small spines; these are highly variable in size and position and non-diagnostic.
Measurements [mm]: Males: abdomen without anal appendages 27–36.5, Hw 24–32. Females: abdomen without cerci or ovipositor 24.5–30, Hw 23.5–29.5.
Remarks. The male from Mampawa must be one of two paratypes of D. podolestoides listed by Laidlaw (1934a) from Mampawa “by Andjoengan” from March 1932, although it is not labelled as such.
Devadatta clavicauda is the most common species of Devadatta across most of its known range in Sarawak and Brunei, becoming less common with increasing altitude above around 700m but still sometimes found above 1100m in places. It appears to be uncommon in the area between the Rajang and Balui Rivers on one side and the Lupar River on the other; this area corresponds to COI clades 1 and 2 (Figs. 1–2). It is typically found at small forest streams.
Separation of the female of D. clavicauda from that of D. podolestoides is difficult, although specimens of the former tend to be smaller and to have a paler synthorax where their ranges overlap. Female specimens have been assigned to D. clavicauda either by DNA matches or because they were taken in tandem or found at sites where only male D. clavicauda were found.
description: Published as part of 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), pp. 301-349 in Zootaxa 4033 (3) on pages 327-332, DOI: 10.11646/zootaxa.4033.3.1, http://zenodo.org/record/253944