Oblongitubus caligicaudatus Luo & Huang sp. nov. (Fig. 1)

Description. Length of male 4.05–4.30mm. Body pale. Crown white. Pronotum white; scutum with triangles yellowish, middle part white (Figs 1A, 1B, 1C). Forewing transparent with some very light white or gray patches (Fig. 1D). Hind wing transparent (Fig. 1E).

Abdominal apodeme reaching to 3rd sternite (Fig. 1F). Pygofer side with upper half short, lower half strongly produced with some long thin setae on dorsal and ventral margin, disc with several microsetae on upper part and numerous small teeth on produced part (Fig. 1H). Subgenital plate not exceeding posterior margin of pygofer (Fig. 1G), basal 3/4 broad with row of thick macrosetae medially and group of short rigid microsetae subapically; apical 1/4 abruptly narrowed and subtriangular, fold dorsally with some microsetae (Fig. 1I). Paramere arched, cephalic part broad, caudal part with base expanded and upper half narrow and slightly curved apically (Figs 1J). Connective lamellar, lateral feet thin and long (Fig. 1K). Aedeagus elongate, strongly sclerotized and pigment at processes and apical half of shaft; shaft thin and long with pair of slim processes dorsal apically and directed basad, and with pair of thin lamellate protrusions dorsal apically; gonopore apical (Figs 1L, 1M, 1N).

Material examined. Holotype. ♂, China, Shaanxi Province, Shiquan County, Raofeng Town, alt. 560m, 8- VIII-2022, coll. Sun, Xu. Paratypes. 5♂, same data as holotype .

Etymology. The species name comes from the combination of Latin words “calig-(boot)” and “cauda (tail)”, referring to the boot-like pygofer side.

Note. This species is very similar to Oblongitubus licinicaudatus sp. nov. in body color and shape, but O. caligicaudatus sp. nov. has the pygofer side boot-like, while O. licinicaudatus sp. nov. has the pygofer side subtriangular and curved dorsally.