Chrysoscota kimsuni Bayarsaikhan & Bae

Bayarsaikhan, Ulziijargal & Bae, Yang-Seop, 2016, Review of the genus Chrysoscota in Cambodia (Lepidoptera, Erebidae, Arctiinae), with description of a new species, Zootaxa 4154 (4), pp. 485-488 : 485-487

Chrysoscota kimsuni Bayarsaikhan & Bae , sp. n.

( Figs. 1 a, b, 4 a, b)

Type materials. Holotype: Male, Cambodia, Samkos (N12˚12′39″, E102˚53′55″), 18.II.2012 (Bae, Ju, Park, and Lee), Gen. Slide No. INU-1398 . Paratypes: 1 male, Cambodia, Bokor (N10˚37′42.70″, E104˚03′50.50″), 17.VIII.2013 (Bae, Ju, Park, and Lee), Gen. Slide No. INU-1002 ; 1 female, Cambodia, Bokor (N10˚39′30.73″, E104˚03′3.74″), 4.II.2014 (Bae, Ju, Park, Na, Kim, and Lee), Gen. Slide No. INU-1309 ; 1 male, 1 female, Cambodia, Kep (N10˚29′37.80″, E104˚18′5.40″), 19.VIII.2013 (Bae, Ju, Park, and Lee), Gen. Slide No. INU-1308, INU-1315.

Description. Adult ( Figs. 1 a, b). Wingspan males 24–25 mm, females 28–29. Frons dark brown; vertex dark brown with gray-yellow selvedge; labial palpus dark brown, with brown 1st segment; antenna ciliate, gray. Patagium dark brown. Tegula dark brown, with gray-yellow selvedge. Forelegs dark brown ventrally, with gray-yellow bands in tibia and tarsus; midlegs dark brown ventrally, with a pair of different sized spurs in apical part (one short, another one long), and gray-yellow bands in tibia and tarsus; hindlegs dark brown ventrally, with a pair of different sized spurs in apical part and a pair of different sized spurs in apical part, and gray-yellow bands in tibia and tarsus. Ground color of forewing dark brown, with gray-yellow markings; gray-yellow discocellular spot with dark brown medial patch; fringe gray-yellow. Hindwing dark, with dark gray basal area; fringe gray. Abdomen dark brown dorsally, grayish ventrally, with two dark streaks. Male genitalia ( Fig. 4 a). Uncus stout; gap between valva and saccular process about 1/3 length of valva; valva and saccular process long, sclerotized, strongly curved; saccus bilobed; aedeagus stout, vesica with scobination. Female genitalia ( Fig. 4 b). Apophyses anteriores similar to apophyses posteriores; the ventral opening of ostium narrow, “V”- shaped, membranous; ductus bursae membranous, tube-shaped, as long as corpus bursae; corpus bursae elongated, with thorn-shaped spines throughout.

Diagnosis. The genus Chrysoscota is divided into three groups by genereal appearance. The first group: C. tanyphara Turner , C. brunnea (Swinhoe) , and C. cotriangulata Holloway , are differs from other members by having mottled dark brown forewing. The second group: C. abomaculata Rothschild , C. flavostrigata Bethune-Baker , C. vagivitta (Walker) , and C. conjuncta , can be distinguished by the clearly separated pale patches in forewing. The last group: C. auranticeps Hampson is easily recognized by the forewing without mottling and pale patches.

C. kimsuni sp. n. belongs to the first group by the forewing pattern. The new species is closely similar to C. brunnea and C. cotriangulata , but can be distinguished by the following characteristics: gap between valva and saccular processes about 1/2 length of valva in the male genitalia, whereas those in C. cotriangulata and C. brunnea , about 1/3 length of valva; valva and saccular processes slender, hook-shaped, whereas in C. cotriangulata , valva slender, almost stright, and saccular process slender, sclerotized, slightly curved and in C. brunnea , valva broadly rectangular, and saccular processes slender, strongly curved; aedeagus stout, whereas in C. cotriangulata , slender, waved and in C. brunnea , stout, waved; the ventral opening of ostium narrow, “V”-shaped, membranous in the female genitalia, whereas in C. cotriangulata , the ventral opening of ostium 3 times broader than C. kimsuni , “–“-shaped, sclerotized and in C. brunnea , the ventral opening of ostium narrow, “U”-shaped, membranous; ductus bursae membranous, tube-shaped, whereas in C. cotriangulata , sclerotized, sub trapezoidal and in C. brunnea , weakly sclerotized, tube-shaped, widened in middle area.

Distribution. Cambodia (Bokor, Kep, Samkos).

Etymology. The species name is dedicated to Dr. Chheng Kimsun, head of the Forestry Administration, Delegate of the Royal Government, The Kingdom of Cambodia.

Figures

FIGURES 1 – 3. Adults of Chrysoscota. 1 a. C. kimsuni sp. n., male, Samkos, Cambodia; 1 b. ditto, female, Kep, Cambodia; 2 a. C. cotriangulata, male, Cardamom, Cambodia; 2 b. ditto, female, Cardamom, Cambodia; 3 a. C. brunnea, male, Peninsular Malaysia; 3 b. C. brunnea, female, Peninsular Malaysia.

FIGURES 4 – 6. Genitalia of Chrysoscota. 4 a. C. kimsuni sp. n., male, HT-INU- 1398; 4 b. ditto, female, PT-INU- 1784; 5 a. C. cotriangulata, male, INU- 1311; 5 b. ditto, female, INU- 1312; 6 a. C. brunnea, male, Peninsular Malaysia; 6 b. C. brunnea, female, Peninsular Malaysia.