Ceraclea (Athripsodina) aerumnula, Yang & Hu & Morse, 2020

Yang, Lian-Fang, Hu, Ben-Jin & Morse, John C., 2020, Interesting new Chinese species of Leptoceridae and Odontoceridae (Insecta: Trichoptera) from several recent collecting efforts, Zootaxa 4732 (1), pp. 138-160 : 142

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.

Figures

FIGURE 2. Ceraclea (Athripsodina) aerumnula Yang & Morse, sp. n., male genitalia. 2A, left lateral; 2B, dorsal; 2C, left inferior appendage and phallus, ventral; 2D, phallus, left lateral.