Tyloperla courtneyi Stark & Sivec 2005

Tyloperla courtneyi Stark & Sivec, 2005

(Figs. 21–22)

Tyloperla courtneyi Stark & Sivec, 2005: 1; Stark & Sivec, 2014: 41.

Supplementary description. Head pale, with a dark brown subtriangular spot on frons and a dark brown subrectangular interocellar patch. Tergum 7 posteromedially with a small, oval, medial patch of sensilla basiconica. Tergum 8 with large, laterally lobed semicircular posteromedial sclerotized portion, bearing dense sensilla basiconica. Tergum 9 medially lightly sclerotized, but with large patch of sensilla basiconica on a hump, posterior edge with darkly sclerotized portion. Hemitergal processes of tergum 10 flat and triangular in lateral view. Aedeagus (Fig. 22): the everted aedeagus is hook-shaped, mostly membranous, with a blunt tip; basal sclerite well developed. Aedeagal tube ventrally with a pair of small, indistinct subapical lobes, and a pair of ventrolateral lobes in the apical part, the latter are armed with small triangular spines; lateral surface of apical half covered with a small patch of small spines. Aedeagal sac strongly curved dorsally, forming an open loop; apical half fully armed with triangular spines gradually lessen towards the apex, but apical spines denser except for bare basal half of the ventral surface.

Material examined. 8 males (HIST), China: Guangxi, Guilin City, Multinational Autonomous County of Longsheng, Huaping National Nature Reserve, Cujiang Station, 25°36'16" N, 109°54'21" E, 887 m, 2020.VI.16, light trap, Mo RR, Lai Y et al.

Remarks. This species was originally described from Doi Inthanon National Park of Chiang Mai City, northern Thailand by Stark & Sivec (2005). Eight male specimens of this species from Guangxi of southern China agree well a posteromedial patch of sensilla basiconica, and aedeagal tube subapically with a pair of indistinct small ventral lobes and laterally covered with a small subapical patch of tiny spines (compare Figs. 21–22 with fig. 1–4 in Stark & Sivec 2005), while in the type specimens, the spines of spiny lobes slightly extended to dorsal surface. These differences can be regarded as intraspecific variation. We provide additional color illustrations (Figs. 21–22) for aiding the recognition of this species.