Indolestes obiri Watson &amp; Moulds 1979
Creators: name: J. A. L. Watson
name: M. S. Moulds
Publisher: name: Zenodo
Year: 1979
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Lestidae
Indolestes
Indolestes obiri

description: Indolestes <i>obiri</i> * Watson sp. n. (Figs 3, 4, 11, 34-37) <i>Indolestes</i> sp. “o <i>”</i>; Watson, 1974: 142. <i>Types— Holotype &amp;male;</i>, <i>Northern Territory</i>: 12°23'S 132 <i>°</i> 56'E, Cannon Hill, 7 km NW <i>by</i> N o f Cahill’s <i>Crossing</i>, East Alligator River, 27-28.v. 1973, J. <b>A</b>. L. W atson (ANIC <i>Type</i> No. 9877) (in <i>ANIC</i>). <i>Paratypes: Northern Territory</i>: one &amp;female;, 11 °59 'S 133 °05 ' <i>E</i>, 5 km S <i>by</i> W of Tor <i>Rock</i>, 5.vi. 1973, <i>T</i>. Weir; one &amp;female;, 12°16 'S 133°13 'E, Birraduk <i>Crfeek</i>, 18 <i>km</i> E by N of Oenpelli, 4.vi. l973, T. Weir; one &amp;female;, 12°18 ' <b>S</b> 133°17 'E, 15 km <i>SW</i> by S of Nimbuwah Rock, 10-ll. <i>xi</i>.1972, J. <b>A</b>. L. Watson; one <i>&amp;male;</i>, one &amp;female;, 12°22 ' <b>S</b> 133°01 'E, 6 <i>km SW <i>by</i> S of Oenpelli, 6.vi. 1973, T. Weir <i>and <i>A</i>. Allwood</i> ; three <i>&amp;male;&amp;male;</i>, three &amp;female;&amp;female;, <b>same</b> locality as holotype, 12-13.xi.1972, J. <b>A</b>. L. Watson; six <i>&amp;male;&amp;male;</i>, four &amp;female;&amp;female;, same data as holotype; one &amp;female;. <b>same</b> locality as <i>holotype</i>, 27. <i>V</i>.1973, T. Weir <i>and</i> N. Forrester; one <i>&amp;male;</i>, 12°25 'S 132°57 ' <i>E</i>, <b>Oberie</b> (= Obiri) Rock, 2 km N N W of Cahill’s <i>Crossing</i>, East Alligator River, 29-30.v. 1973, J. <b>A</b>. L. Watson; one <i>&amp;male;</i>, 12°50 ' <b>S</b> 132 °52 ' <i>E</i>, Baroalba Gorge, 19 <i>km</i> E <i>by</i> N of <b>M</b> t Cahill, 8.iii. 1973, J. <b>A</b>. L. W atson; one <i>&amp;male;</i>, 12°52' <b>S</b> 132 <i>°</i> 47'E, Nourlangie <i>Creek</i>, <b>8</b> <i>km</i> E of Mt Cahill, 17-18.xi.1972, J. <b>A</b>. L. W atson; four <i>&amp;male;&amp;male;</i>, one &amp;female;, 12°52 ' <b>S</b> 132 <i>°</i> 50' <i>E</i>, <b>Koongarra</b>, 15 <i>km</i> E of Mt Cahill, 24-25. <i>V</i>. 1973, J. <i>A</i>. L. Watson; four <i>&amp;male;&amp;male;</i>, 12°55' <b>S</b> 132°56' <i>E</i>, Lightning <i>Dreaming</i> <b>Gorge</b>, 25 km E by S of Mt Cahill, 12. <i>vi</i>.1973, T. Weir.</i> One paralectotype &amp;female; of Austrolestes <i>albicauda</i> tindalei, from Groote Eylandt, N. B. Tindale (<b>SAM</b>), appears to <b>be</b> a very pale <i>specimen</i> of <i>I. obiri.</i> However, it is not to be <b>regarded</b> as a paratype of <i>I. obiri.</i> <i>Male</i> A sombre-coloured species, with pale brown and dull metallic green head and thorax, dark brown and cream abdomen. <b>*</b> <i>obiri,</i> for Obiri (Oberie) Rock, a habitat of this cave-haunting lestid; to be treated as an indeclinable noun. <i>Head</i>.—Labium yellowish; labrum and anteclypeus pale greenish brown, slightly darkened on either side of midline; mandibles and genae pale greenish brown; postclypeus pale brown, slightly and variably darkened, approximately central spot on each side; frons pale brown <i>in</i> front, dark greenish on top with pale middorsal <i>stripe</i>, forming pale T-shaped mark and upper part of anterior frons, sometimes obscured; vertex dark greenish, with pale brown <i>ring</i> around <i>median</i> ocellus, sometimes obscured, pale brown crescents beside and behind each lateral ocellus, meeting <i>in</i> midline, and pale spot behind each antenna; occiput pale brownish <i>in</i> midline, along postocellar suture, and <i>occipital</i> margin, leaving broad, irregular triangular green spot adjacent to eye; back o f head pale brown, except for dark green upper parts of postgenae, bordering eyes; scape dark brown, pedicel dark brown <i>in</i> front, pale brown behind, basal segment of flagellum pale brown, darkened apically, rest o f flagellum black. <i>Prothorax</i> pale brown; median and posterior lobes with variable, dark green spots on either side of broad middorsal pale <i>stripe</i>; upper episternum and <i>epimeron</i> marked dark brown; coxa and trochanter pale yellowish brown, spinose <i>inner</i> surfaces of femur and tibia tinged dark brown; tarsi shaded dark brown. <i>Synthorax</i> (Fig. 3) pale brown, m arked darker as follows; collar dark brown; a dark line on each side of dorsal <i>carina</i>, sometimes fused with <i>greenish</i> band extending across <i>mesanepisternum</i> from collar to dark antealar ridge <i>and sinus</i>, which is extended towards mesopleural suture near its centre, and over its upper <i>quarter</i>; a shadowing along mesopleural suture from large upper dark spot to dark spot at angle of suture; a diagonal, trilobed dark green band across <i>mesepimeron</i>, from mesopleural suture to upper middle lateral suture; dark <i>stripe</i> below subalar ridge continuing into triangular <i>patch</i> on metanepisternum, prolonged into dark brown line reaching almost to lower end of upper metapleural suture; a variable dark brown line along upper posterior corner o f <i>metepimeron</i>, adjacent to poststernum; black spot on <i>either</i> side of poststernum; sterna apparently dark brown and yellowish brown, a dark brown midventral stripe extending across metapostcoxales. Coxae and trochanters yellowish; femora and tibiae pale brown, lined dark brown between rows of spines; tarsi pale brown, darkened distally, claws blackish. <i>Wings</i>.—Average length of hind wing 22.34 mm (range 21.1-23.1 mm, N = 10); hyaline, most <i>veins</i> dark brown, R + <b>M</b> and R 1pale brown; pterostigma pale brown, that of fore wing averaging 1.368 <i>mm</i> long (range 1.28-1.40 mm), 0.566 mm wide (range 0.54-0.62 mm) (N = 10). <i>Abdomen</i> (Fig. 11).—Tergite 1 pale brown, darker at extreme base and over distal third, posterior transverse carina dark brown; tergite 2 mainly dark brown above, with pale basal band <i>continuing</i> into pale lateral margin, broken middorsally by narrow dark line on either side of light middorsal <i>stripe</i>, and with illdefined pale transverse band approximately two-thirds o fsegment from base, connecting pale lateral areas at narrowest point of brown dorsal mark to dilatation of middorsal stripe; tergites 3-6 dark brown marked creamy white, the pale m arks increasingly obscured <i>in</i> the more posterior segments—a whitish basal band, broken above by fine dark line on each side of middorsal pale line, and broad whitish transverse band, expanded below, shading from brown approximately two-thirds of segment length from base <i>in</i> middorsal line, ending abruptly at dark brown band occupying distal 20% o f tergite; tergite 7 similar <i>in</i> pattern to tergites 3-6, the pale areas variably obscured, sometimes only basal band and lateral whitish patch evident; tergite 8 dark brown, with or without pale lateral spot just basal to midpoint o f segment; tergite 9 dark brown; segment 10 whitish, with dark brown posterior margin and variable basal dark brown band sometimes expanded at sides (Fig. 11), more commonly narrow, broadest middorsally. Sternite 1 very pale brown; secondary genitalia pale and dark brown; sternites 3-7 with colour patterns matching those of corresponding tergites; sternite 8 dark brown, with pale patch on each side <i>in</i> distal half; sternite 9 pale brown. <i>Anal appendages</i> (Figs 34-37).—Superior appendages averaging 1.350 mm long (range 1.30-1.42 mm, N = 10); basal quarter to third pale, <i>apices</i> dark brown; armature almost concealed <i>in</i> dorsal view, comprising ventral, backwardly curved <i>spine</i> bearing apical pencil of setae, and connected by low ridge to slim medioventral <i>spine</i>, the tip o fformer 0.67-0.75 x, o flatter0.34-0.39 x appendage length from base. Interior appendages rounded, pale brown, margined darker brown. <i>Female</i> Size as <i>in</i> male, hind wing averaging 22.49 mm long (range 21.6-23.2 mm), fore wing pterostigma 1.370 mm (range 1.30-1.42 mm) x 0.584 mm (range 0.54-0.62 mm) (N = 9), the abdomen stockier and shorter than <i>in</i> male, segments 8-9 swollen. Colour and pattern as <i>in</i> male, but dark markings, particularly of synthorax, less extensive (Fig. 4), and <i>in</i> female from G roote Eylandt much less extensive and paler, as in <i>I. alleni;</i> middorsal pale <i>stripe</i> on <i>tergite</i> 3 ofalmost uniform width, not distended into pale <i>spot</i>; whitish bands on tergites 3-6 less well defined than <i>in</i> male, the subapical band narrower; tergites 8- <b>9</b> sometimes showing dark middorsal line and apical band, the adjacent areas slightly paler brown, the lateral parts of tergite pale brown. <i>Habitat</i> All but one of the known specimens of <i>I. obiri</i> were taken along the Arnhem Land escarpment and its outliers, where the damselflies frequent shallow caves and overhangs. The breeding grounds are unknown, although a male was taken, apparently on territory, over the upper floodwaters of Baroalba Creek in March 1973.
description: Published as part of <i>J. A. L. Watson &amp; M. S. Moulds, 1979, New Species of Australian Lestidae (Odonata), pp. 143-155 in Australian Journal of Entomology 18</i> on pages 152-154, DOI: 10.1111/j.1440-6055.1979.tb00828.x, http://zenodo.org/record/3699605
description: {"references": ["Watson, J. A. L. (1974). - The distributions of the Australian dragonflies (Odonata). J. Aust. ent. Soc. 13: 137 - 149."]}