Celaenorrhinus taiwanus Matsumura, 1919

Huang, Zhen-Fu, Chiba, Hideyuki, Fei, Wen & Fan, Xiao-Ling, 2014, The maculosus group of the genus Celaenorrhinus Hübner, 1819 from China, with discovery of female C. kuznetsovi Devyatkin, 2000 (Lepidoptera: Hesperiidae: Pyrginae), Zootaxa 3881 (3), pp. 279-290 : 283-284

Celaenorrhinus taiwanus Matsumura, 1919 stat. rev.

Figs. 5–6 , 35–40

Celaenorrhinus taiwanus Matsumura, 1919: 686 , pl. L, fig. 22 (Type locality: Taiwan). Celaenorrhinus maculosa taiwanus: Evans, 1949: 93 .

Celaenorrhinus maculosus taiwanus: Shirôzu, 1960: 383 ; Chou, 1994: 703; Hsu et al, 2006: 326.

Diagnosis. Forewing length 24 mm. Wings brown. Forewing upperside with subapical spots in R4 smaller than spots in space R3 and R5, latter two spots equal in size; cell spot and spot in space CuA1 overlapped; spot in space M3 is smaller than that in CuA2; two spots in CuA2 almost rounded, lower spot slightly larger; forewing underside basal striping much reduced and faint. Hindwing upperside with the spot in space Rs small and faint.

Male genitalia ( Figs. 35–40 ). Gnathos well developed, densely covered with spines; valva nearly rectangular, dorso-distal part of valva narrow and small bifid; aedeagus robust; cornuti well developed and curved; juxta deeply quadrifurcated and branches equal.

Material examined. 2♂, Puli, Nantou County, Taiwan, VII-1974, Igarashi Suguru; 1♂, Qingquan, Xinzhu County, Taiwan, 10-VII-1991, Igarashi Suguru; 1♂, Taipingshan, Taiwan, 27–30-VIII-1926, Kato Masayo; 1♂, Jiayi County, Taiwan, 10-VIII-1925, Kato Masayo; 1♂, Xinzhu County, Taiwan, 30-VI-1988, Ra [Luo].

Distribution ( Fig. 68). China ( Taiwan).

Remarks. Matsumura (1919) described taiwanus as a distinct species. Evans (1949) treated it as a subspecies of C. maculosus , and the subsequent authors have followed the treatment ( Shirôzu, 1960; Chou, 1994; Hsu et al., 2006). We examined 6 specimens, as well as referring to Shirôzu, 1960, fig. 419, pl. 905–907. Its wing patterns and male genitalia are rather constant, and show that it and the so-called nominate subspecies are significantly prominent in the following characteristics: forewing underside, basal striping much reduced in taiwanus (very developed in maculosus ); cell spot and spot in space CuA1 overlapped in taiwanus (separated in maculosus ); hindwing upperside with spot in space Rs small and faint in taiwanus (large and distinct in maculosus ); valva with distal end vertical, narrow and small U-shaped at the tip in taiwanus (distal end oblique, shallowly V-shaped at the tip in maculosus ); juxta branches equal in length, with lined mid-basal ridge in taiwanus (lateral branches less than 1/2 length of two middle branches, spherical mid-basal process in maculosus ). So, we agree with Matsumura that it is a good species.

Figures

FIGURES 1 – 20. Adult of the masulosus group species: 1 – 4. C. maculosus (Felder & Felder) (Guangdong), male (1 – 2), female (3 – 4); 5 – 6. C. taiwanus Matsumura, male (Taiwan); 7 – 8. C. osculus Evens, male (Guangdong); 9 – 12. C. major Hsu (Taiwan), male (9 – 10), female (11 – 12); 13 – 16. C. inexpectus Devyatkin (Guangdong), male (13 – 14), female (15 – 16); 17 – 24. C. kuznetsovi Devyatkin, male (Guangxi) (17 – 18, 21 – 22), female (19 – 20 (Guangdong); 23 – 24 (Guangxi )); 25 – 27. C. yaojiani Huang & Wu (Guangxi, holotype). Odd numbers, upperside; even numbers, underside; scale bar, 10 mm.

FIGURES 35 – 40. Male genitalia of C. taiwanus Matsumura (Taiwan). 35. ring, lateral view; 36. tegumen, ventral view; 37. right valva, inner view; 38 – 39. aedeagus; 40. juxta.