Zographetus rienki Xue, 2019

Xue, Guoxi, Li, Meng, Li, Xiaojuan, Xie, Guoguang, Chen, Keda & Li, Jialing, 2019, A new species of the genus Zographetus Watson, 1893 from China (Lepidoptera: Hesperiidae), Zootaxa 4629 (2), pp. 255-262 : 256-259

Zographetus rienki Xue sp. nov.

Type material. HOLOTYPE ♂: Nanling National Nature Reserve , 1150 m, Ruyuan, Guangdong, China, 22.VII.2017, leg. Guoxi Xue [GD7, A55].

PARATYPE: 1♂, Mt. Wuzhishan , 760 m, Hainan, China, 19.V.2019, leg. Guoxi Xue ; 1f*, Mt. Shengtangshan , Dayaoshan National Nature Reserve, 1200 m, Guangxi, China, 15.VI.2015, leg. Chunhao Wang [A50].

Description. Male ( Fig. 1-A, B ). Antennae: 10.5 mm in length, black, ventral side of distal club with white scales, apiculus sharply pointed; nudum 15 in number, orange. Labial palpi: ventral side of second segment covered with yellowish white scales, mixed with dense black scales and hairs; third segment porrect, short, much thicker than shaft of antennae, black, blunt pointed. Dorsal side of head and both sides of thorax and abdomen covered with greenish brown hairs. Forewing: 18 mm in length, dorsal side dark brown, basal area darker and covered with greenish brown scales and short hairs; spots pale yellow, semi-hyaline; discal cell with two separated spots, of which upper one equally sized to subapical dot in space R 5, lower one elongated toward wing base; spot in space Cu 1 big, trapezoidal, inner margin perpendicular to vein Cu 2, outer margin slanted outward; spot in space M 3 cuneiform, not overlapped with that in Cu 1; ventral side ground color dark brown, basal and costal area overlaid with greenish brown scales, base of dorsum with a black hair tuft. Hindwing unmarked, dorsal side dark brown, covered with greenish brown and black hairs; ventral side clad with ochreous scales.

Male genitalia ( Fig. 2 ). In dorsal view of tegumen, middle of front margin shallowly concave, middle of distal margin with a small mastoid process. Basal half of uncus tapered in dorsal view, central area transparent; distal portion of uncus elongated, finger like, distal end round and bent downward in lateral view. Gnathos vestigial. Saccus relatively short, slightly bent upward. Basal half of valva with dorsal margin flat and ventral margin constricted. Distal half of valva tapered and bifid into a small erected hump-shaped process and a big approximately triangular plate, dorsal margin of the latter shallowly wavy and armed with sawteeth, distal end round. Aedeagus as long as ventral margin of valva, horn-like in dorsal view, dorsal margin of distal portion deeply concave, ventral margin of distal half convex in lateral view; subzonal sheath twice as long as suprazonal sheath. Juxta broad, V-shaped.

Female ( Fig. 1-C ). Slightly larger than male. Wing pattern similar to that of male, except that the outer margin of spot in space Cu 1 perpendicular to vein Cu 2 rather than oblique. Cilia gray on forewing and yellowish on hindwing.

Female genitalia ( Fig. 3 ). In lateral view, papillae anales long elliptical, covered with long hairs. Lamella postvaginalis very wide, middle of distal margin slightly concave. Lamella antevaginalis quadrangular, well developed, with a triangular plate on each side. Ductus bursae tube-like, sclerotized; bursa copulatrix bursiform, without signum.

Distribution. Ruyuan (Guangdong), Jinxiu (Guangxi), Hainan.

Bionomics. The holotype male was captured at 10:00 am when it was perching on a bush under sunlight, with its forewings semi-erect and hindwings flat. The bush is by the side of an asphalt-paved road which was built several years ago to replace the old sand road. The influence of this asphalt road on butterflies of the reserve is to be studied. The paratype male was discovered nearby a tourist route at 2:00 pm when it suddenly appeared on a leaf, with its wings erect. The paratype female was found resting on the ground near a parking lot in the afternoon. This suggests the new species has some tolerance against human activity. The habitats of the type localities in Guangdong and Guangxi are shown in Fig. 4 and Fig. 5 , respectively.

Etymology. The new species is named after Dr. Rienk de Jong (Naturalis Biodiversity Center, The Netherlands) for his contribution to the study on taxonomy and biogeography of the Hesperiidae.

Based upon de Jong & Treadaway (1993a: 113; 1993b: 77; 2007: 37; 2008: 8), Eliot (1959: 386; 1967: 149, 1992: 362), Evans (1949: 299), de Nicéville (1887: 463), Elwes & Edwars (1897: 203), Fan et al. (2007: 301) and specimens examined, a key to species of the genus Zographetus is given as follows.

Figures

FIGURE 1. Adults of Zographetus rienki. A. male, from Hainan. B. male, from Guangdong. C. female. a. dorsal side. b. ventral side. Scale bar = 1 cm.

FIGURE 2. Male genitalia of Zographetus rienki. A. genital capsule, lateral view, aedeagus removed. B. ditto, oblique lateral view. C. ditto, anterior dorsal view. D. ditto, ventral view. E. ditto, dorsal view. F. aedeagus, dorsal view. G. ditto, lateral view.

FIGURE 3. Female genitalia of Zographetus rienki. A. lateral view. B. oblique lateral view. C. ventral view. D. ditto, en- larged.

FIGURE 4. Habitat of the holotype of Zographetus rienki: Nanling National Nature Reserve of Guangdong. Photographed by Guoxi Xue.

FIGURE 5. Habitat of the female paratype of Zographetus rienki: Mt. Shengtangshan, Dayaoshan National Nature Reserve of Guangxi. Photographed by Guoxi Xue.