Rhyacophila shiliae Sun, 2016, n. sp.
Creators: name: Sun, Chang-Hai
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Rhyacophilidae
Rhyacophila
Rhyacophila shiliae

description: Rhyacophila shiliae n. sp.
(Fig. 3 A–3D)
Diagnosis. This new species is similar to the members of R. sibirica Subgroup (R. sibirica Species Group, R. invaria Twig, R. philopotamoides Branch; Schmid 1970; Schmid et al. 1993) in male genitalia, but can be diagnosed easily from them by the following combination of characters: (1) segment X, especially the vertical part, is smaller than those of the other species; (2) segment X in dorsal view has the apex truncate; (3) the apex of the ventral lobe of the aedeagus has a deep mesal incision; and (4) the apical segment of each inferior appendage in lateral view is divided apically into a shorter upper lobe and a longer lower lobe.
Description. Length of each forewing: 10.0 mm (n = 11). Body (in alcohol) dark brown. Head dark brown, setal warts yellowish brown; eyes brown; palpi brown; antennae dark brown, scapes strong, each with length about 2 times as long as width, other segments short. Prothorax brown, pterothorax dark brown; legs with all coxae and tibial spurs black, other parts brown; wings yellowish brown. Abdomen dark brown.
Male genitalia. Segment IX (IX) in lateral view subrectangular, with upper portion longer than lower one, rectangular in dorsal view, twice as wide as long, with anterior and posterior margins slightly sinuate. Segment X (X) in lateral view with horizontal part (h.p.X) larger than vertical one (v.p.X), in dorsal view rectangular with apex truncate, in caudal view with well sclerotized tubercle in center of segment. Anal sclerites (a.s.) small, in caudal view button-shaped. Tergal strap reduced. Dorsal process of aedeagus (d.p.) in lateral view short and narrow, barshaped, in dorsal view rectangular. Dorsal branch of aedeagus (d.p.a.) in lateral view roof-shaped, in dorsal view subrectangular, with apex slightly concave; ventral branch (v.b.a.) cylindrical, with apex extending slightly beyond apex of dorsal branch. Ventral lobe of aedeagus (v.l.a.) about as long as inferior appendages, with its apex incised mesally. Basal segment of each inferior appendage (b.i.a.) somewhat trapezoidal in lateral view, in ventral view with its inner margin sinuate and outer margin straight; apical segment (a.i.a.) in lateral view with apex incised mesally into two lobes, upper lobe short and lower lobe slightly longer than upper one, in ventral view somewhat rectangular.
Holotype male. P.R. CHINA: Inner Mongolia, Gen-he city, Han-ma National Nature Reserve, a stream near the Administrative center, 51.634°N, 122.347°E, elev. 823 m, 30 July 2014, collected by Li SHI, Ming-run TIAN, Yu-xuan ZHU, Xue-feng GAO, Chao CHEN.
Paratypes: Same data as holotype, 10 males.
Etymology. The new species is named after Dr. Li SHI, Inner Mongolia Agricultural University, who donated the type specimens to the NJAU.
Distribution. China (Inner Mongolia).
Remarks. About 40 species are included in the R. sibirica Species Group, most of which are Holarctic; the most southern species, to my knowledge, is R. furva MALICKY & SUN 2002, which has been reported from Shaanxi Province, Ning-shan county (33.3°N, 108.3°E), just on the border between the Palearctic and Oriental regions in China. This new species R. shiliae n. sp. from Inner Mongolia constitutes the second Chinese species of the group.
description: Published as part of Sun, Chang-Hai, 2016, New species, new records, and new collection data of Rhyacophila from China (Trichoptera: Rhyacophilidae), pp. 134-144 in Zootaxa 4189 (1) on pages 137-139, DOI: 10.11646/zootaxa.4189.1.6, http://zenodo.org/record/165701