Ceraclea (Athripsodina) aerumnula Yang & Hu & Morse 2020, sp. n.

Ceraclea (Athripsodina) aerumnula sp. n. Yang & Morse

(Figs. 2 A–2D)

Diagnosis. This new species is somewhat similar to C. (A.) excisa (Morton 1904), C. (A.) shuotsuensis (Tsuda 1942), and C. (A.) globosa Yang & Morse 1988 from northeastern China (Yang & Morse 2000) in the following character of the male genitalia: Inferior appendages each with well-developed phallic guide, but it differs from those in having the phallic guide broadly trapezoidal in caudal view (triangular in C. excisa, C. shuotsuensis, and C. globosa). On the other hand, the new species is somewhat similar to C. (A.) emeiensis Yang & Tian 1987 from central China, and C. (A.) brachyacantha Yang & Tian 1987 from southeastern China in the following character: Tergum X is slender with its distal half highly elevated in lateral view. However, it differs from those in having the basoventral lobe of each inferior appendage bearing a long, stick like black rod apically (lacking from the basovental lobe in C. emeiensis, a very short apical spine in C. brachyacantha); and in the phallus has only one stout, rod-like paramere spine with the distal 1/3 twisted to the left, which is different from all of the five species above.

Adult. Length of each male forewing 7.0– 7.5 mm (n = 5), of each female forewing 6.0 mm (n = 2). Most type specimens teneral, generally pale; only holotype non-teneral, fully mature. Head and thorax brownish-black, antennae light brown. Wings dark brown, covered with concolorous fine hair; with traces of few small white spots sparsely scattered on distal half of each forewing near anterior margin.

Male genitalia. Segment IX basically rectangular, abruptly shorter longitudinally on dorsal 1/ 3 in lateral view (Fig. 2A), forming narrow transverse band projecting caudad in arch in dorsal view. Preanal appendages short, oval in lateral view (Fig. 2A); fused with each other in basal half, each obtuse apically in dorsal view (Fig. 2B). Tergum X about 2 times as long as preanal appendages, broadly triangular at basal half with distal half abruptly narrowing to blunt apex in dorsal view (Fig. 2B); narrow, with basal 2/3 elevated obliquely then smoothly curved downward and backward in lateral view (Fig. 2A); lateral processes of tergum X stout, originating basally, about 2/3 as long as tergum, divergent from tergum X apically, apex of each bearing short, upturned, spine-like process (Figs. 2A, 2B). Basoventral lobe of each inferior appendage broad basally, about as long as main body of appendage including apicodorsal lobe, with single, stick-like sclerotized rod apically, nearly 1/2 as long as basoventral lobe (Fig.); main body of inferior appendage about 1.5 times as long as thick, subapicodorsal lobe as long as main body of appendage in lateral view (Fig. 2A), mesal ridge represented as small setose lobe, phallic guide produced in large plate in caudal view (Fig. 2C); harpago 1/2 as long as subapicodorsal lobe, with triangular apex directed mesad in caudal view (Fig. 2C). Phallobase with anterior portion nearly 3 times as broad as posterior apicoventral lobes and about 1/2 as long; one stout paramere about 3/4 as long as phallobase with distal 1/4 curving to left (Fig. 2C).

Holotype male. PR CHINA: Zhe-Jiang Province: City of Tai Zhou, Lin-hai County, Kuo-cang-shan [Mt.], N28.83, E120.98, alt. 450 m, 5 May 2016, Coll. Xu J-h. Paratypes. Same data as holotype, 2 males and 2 females. Zhe-jiang, Lin-an, Qing-quan-ju (West Tian-mu Mt.), Chi-wu-li, N30.50, E119.60, alt. 263 m, 12 May 2015, Coll. Xu J-h., 2 males. Zhe-jiang, An-ji, Long-wang-shan, alt. 400 m, 3 June 1999, Coll. Du Y-z., 10 males.

Etymology. Latin, aerumnula, feminine noun in apposition, meaning a “traveler’s stick for carrying a bundle,” with reference to the stick-like apical rod of the basoventral lobe of each inferior appendage.

Distribution. East Palearctic Biogeographic Region, Southeast China.