Tyloperla khang Stark &amp; Sivec 2005, sp. n.
Creators: name: Stark, Bill P.
name: Sivec, Ignac
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Tyloperla
Tyloperla khang

description: <b>Tyloperla khang, sp. n.</b> (Figs. 11-20) <b>Material.</b> Holotype &amp;male; from Vietnam, Gia Lai, An Khe District, Tram Lap, Azun River, 3 km NE forestry building, 21 June 1996, D. Currie, J. Swann, ROM 961076 (ROM). Paratypes: Vietnam: Gia Lai, Buoenloy, May 1995, A. Gorohov, 1 &amp;male; (PMSL). Thua Thien-Hue, Bach Ma National Park, junction Rhododendron and Five Lakes trails, 16 June 2000, 1200 m, B. Hubley, D.C. Darling, ROM 2000531, 1 &amp;female; (IEBR). <b>Adult habitus.</b> Triocellate. Head with dark spot over ocelli distinctly narrowed anteriorly (Fig. 11). Wing membrane pale brown, veins darker. Legs banded, femora dark brown apically, tibiae with apical and basal dark bands. <b>Male.</b> Forewing length 12-13 mm. Hair brushes on abdominal sterna 5-7 and thoracic metasternum. Tergum 7 with a low posterior mound and a few sensilla basiconica in mesal patch. Tergum 8 with a mesal patch of sensilla basiconica on a slightly raised sclerite. Tergum 9 with a small mesal patch of sensilla basiconica (Fig. 12). Hemitergal processes rounded dorsolaterally (Fig. 14) and grooved along inner margin; basal cushion almost half as long as entire inner length of hemitergal process (Fig. 13). Everted aedeagal sac tubular, curved ventrad and without additional lobes (Fig. 15); armature consists of a subapical band of spines narrowly interrupted on dorsum, and a smaller mesal patch, narrowly connected to subapical band but broadly interrupted dorsolaterally. <b>Female (putative).</b> Forewing length 15 mm. Subgenital plate generally triangular in outline, produced over about half of sternum 9 and slightly excavated on apical margin (Fig. 16). Vagina longer than wide, sparsely armed with small triangular spines around periphery but with several denser clusters near base of spermathecal stalk (Fig. 17). Spermatheca hook shaped but apex rounded. <b>Egg.</b> Outline more or less spherical (Fig. 18), collar reduced to a small button-like bump. Chorion covered throughout with large square pits with punctate floors (Fig. 19). Opercular ring distinct as a narrow ridge separating lid from egg body (Fig. 20). Micropyles with large funnel-like orifices located above opercular ring. <b>Larva.</b> Unknown. <b>Diagnosis.</b> Males of this species are similar to <i>T. formosana</i> (Okamoto) and <i>T. courtneyi</i> (described above) in the absence of a distinctly produced lobe on tergum 8. In the former species the basal cushions of the hemitergal processes are long and less rounded and the aedeagal sac has a pair of small, subapical ear-like lobes. <i>Tyloperla courtneyi</i> can be distinguished on the basis of the paired basolateral lobes on the aedeagal sac which are absent in <i>T. khang.</i> Other species of <i>Tyloperla</i> differ in having a distinct mesal lobe on tergum 8. The putative female is associated on the basis of shared color pattern. 11 12 <b>13</b> 14 17 <b>16</b> <b>Etymology.</b> The species name, used as a noun in apposition, honors the Khang people of Vietnam.
description: Published as part of <i>Stark, Bill P. &amp; Sivec, Ignac, 2005, New Species Of Tyloperla (Plecoptera: Perlidae) From Vietnam And Thailand, pp. 1-7 in Illiesia 1 (1)</i> on pages 4-7, DOI: 10.5281/zenodo.4758557