Journal 
The Flatidae currently includes 1,422 extant species in 298 genera (Bourgoin, 2016). Among them, only three described species, Geisha distinctissima (Walker), Mimophantia maritima Matsumura and Metcalfa pruinosa (Say) have previously been recorded in Korea (Kwon and Huh, 2001; Lee and Wilson, 2010). Metcalfa pruinosa recently became one of the major invasive alien species in Korea (Kim and Kil, 2014). Geisha distinctissima is known as the insect pest of various plants (Fujiwara, 2008) and the vector of a virus which causes dwarf disease of satsuma mandarin in Japan (Mead, 2014).
The genus Salurnis (Hemiptera: Fulgoroidea: Flatidae) was established by Stål (1870) with Salurnis granulosaStål, 1870 from the Philippines as a type species. Subsequently, Distant (1906), Kirkaldy (1913), Jacobi (1915) and Lallemand (1939) reported respectively the genus from Myanmar, China, Taiwan and Malaysia. So far, nine species were described in the genus Salurnis, i.e., bipunctata (Walker, 1862), dilinaMedler, 1992, dulitanaLallemand, 1939, estoraMedler, 1992, granulosaStål, 1870, hesitaMedler, 1992, kryalaMedler, 1992, lastendisMedler, 1992, and marginella (Guérin-Méneville, 1829). All the species of the genus are distributed in the Oriental Region and mainly reported in southeast Asia and south China (Bourgoin, 2016).
In this paper, we reported the occurrence of the genus Salurnis for the first time from South Korea with a newly recorded species Salurnis marginella (Guérin-Méneville, 1829). Morphological information is provided including the description and diagnosis of the genus and species with photographs of the adult, genitalia and nymphs. Also, biological information is provided including host plants, geographical distribution and ecological photographs.
Materials and Methods
The following abbreviations are used in this paper: CN, Chungcheongnam-do Province, Korea; JB, Jeollabuk-do Province, Korea; NIE, National Institute of Ecology, Seocheon, Korea. The voucher specimens examined in the present study have been deposited in the NIE. Morphological study was examined using by a stereomicroscope (Olympus SZX16), camera (Olympus, DP27) and software (Olympus cellSens Standard) in NIE. The terminology used in this study follows Medler (1996) and Peng et al. (2009).
Results and Discussion
Taxonomic accounts
Key to the species of Flatidae from Korea
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1. Body and tegmina green or pale green (Tribe Phyllyphantini) ····································································· 2
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2. Apical angle of tegmina rounded; more than 90° ···················································· Geisha distinctissima
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3. Mesonotum without longitudinal carina (Tribe Nephesini) ························································Metcalfa pruinosa
Family Flatidae Spinola, 1839
Subfamily Flatinae Melichar, 1901
Tribe Phyllyphantini Melichar, 1923
Genus SalurnisStål, 1870 뾰족날개선녀벌레속 (신칭)
SalurnisStål, 1870: 773; Metcalf, 1957: 193 (catalog); Medler, 1992: 7 (review).
Type species: Salurnis granulosaStål, 1870.
Diagnosis. Body green or yellowish green, strongly contrasting patterns of dark brown or black spots in cells along postclaval margin, interveinal spots or dashes along costal, and apical and margins. Head conical, without median longitudinal carina, transverse intergenal carina concealed by anterior margin of pronotum. Mesonotum with three or four longitudinal carinae. Forewing apically rounded, anal angle acute.
Salurnis marginella (Guérin-Méneville, 1829) 뾰족날개선 녀벌레 (신칭)
Ricania marginellaGuérin-Méneville, 1829: pl. 58, fig. 6. (Type locality: Cochin, China).
Poeciloptera marginella (Guérin-Méneville): Spinola, 1839: 433.
Poeciloptera fimbriolataStål, 1854: 247, synonymized by Melichar, 1902: 41.
Nephesa marginella (Guérin-Méneville): Walker, 1857: 161.
Phyllyphanta fimbriolata (Stål): Stål, 1859: 282.
Phylliphanta marginalisSignoret, 1862: 125, synonymized by Metcalf, 1957: 196.
Phyllyphanta limbataPerroud & Montrouzier, 1864: 243, synonymized by Metcalf, 1957: 196.
Flata marginella (Guérin-Méneville): Atkinson, 1886: 69.
Salurnis marginellus (Guérin-Méneville): Melichar, 1902: 41; Medler, 1992: 13.
Salurnis formosanaJacobi, 1915: 171, synonymized by Melder, 1992: 1.
Colgar limbataDistant, 1920: 461, synonymized by Metcalf, 1957: 198.
Diagnosis. Body green or yellowish green, pronotum and mesonotum with four orange longitudinal carinae. Obtuse angle of frons edge approximately 120° (dorsal view), triangular or half ellipse shape spot on inner margin near anal area of forewing. Forewing apex rounded, anal angle acute, hind tibiae as 1:7:9:2.
Description
Adult. Head slightly narrower than pronotum. Frons and legs brown. Forewing margin dark brown; several dark brown spots on margin; veins mustard and inner cells of veins bright green (Fig. 1A-B). Hindwing opaque, white or emerald. Abdomen brown and covered by white or emerald powder (Fig. 1C-D).
Male genitalia. Anal segment elongate; longer than genital segment, apex round and widest, dorsal margin oblique at apical third. Pygofer larger than genital style and wider than long, more longer ventrally than dorsally in lateral view. Phallus curved with 3 flagellum; a pair of spinose processes laterally at apex with 11 (ventrally 4, dorsally 7) spines, extended similarly to phallus. One short process, half length of phallus at median on dorsal margin. Genital styles subrectangular, smaller than pygofer, wider at subapically than base, with two processes on dorsal margin.
Female genitalia. Complex as figured
Nymph. Base color and eyes white in young nymph, become yellowgreen in last instar. A pair of 2 bright yellow or orange longitudinal stripes from head to abdomen beside the median line. Especially 2 waxy secretion tales from distal abdominal segment; V-shape; horizontally extended; thick and growing longer than body length. Body length(n=5) 1.93~1.97 mm, longest wax secretion(n=1) 4.12 mm in 3rd instar.
Measurements. Male (n=10), female (n=10): Body length (including forewing) male 9.56 mm (SD=0.33), female 10.62 (0.30). Frons ~ distal abdomen length male 5.97 (0.25), female 5.82 (0.38). Frons ~ scutellum length male 2.88 (0.18), female 3.08 (0.15). Forewing length male 8.20 (0.18), female 9.20 (0.29). Forewing area male 29.76 mm2 (1.89), female 36.78 mm2 (2.66). Generally female larger than male except frons ~ distal abdomen length because of genital segment (Fig. 1C-D).
Specimen examined. 10♂ adults, 10♀ adults, 10 nymphs: Seogwang-dong, Iksan-si, JB, Korea, 29.VII.2014, DE Kim; 5 nymphs: Suseong-dong, Jeongeup-si, JB, Korea, 12.VI.2015, DE Kim & HJ Lee; 1 adlut: Deokjin-dong, Deokjin-gu, Jeonju-si, JB, Korea. 28.VIII.2015, HM Lee; 3 nymphs: Maseo-myeon, Seocheon-gun, CN, Korea, 16.VI.2015, DE Kim & HJ Lee.
Distribution. China (Macau, Anhui, Fujian, Zhejiang, Guangdong, Guangxi, Hainan, Henan, Hunan, Hubei, Jiangxi, Sichuan, Taiwan), India, Indonesia, Korea(new record: South), Malaysia, Myanmar, Singapore, Taiwan, Vietnam.
Host plants.Castanea crenata, Prunus verecunda, Prunus yedoensis, Quercus acutissima, Quercus serrata, Zanthoxylum schinifolium.Fig. 2Fig. 3
Biology. Nymphs were observed from early June to late July and adults were observed from late July to September in Korea. Young nymphs were usually observed under the young and soft leaves. Old nymphs and adults were usually observed on the stem or under leaves of host plant (Fig. 4B-C). Generally the insects walk very slowly, but often hop using their hind legs. Nymphs produce a wax secretion from the end of the abdomen and other parts of the body and deposit the wax on the host plant. Long, thick and V-shape waxy accumulations are a special feature of this species, growing to over twice the length of the insect’s body length, later shortening after molting only to grow again (Fig. 4A-B).
Remarks.Salurnis marginella was newly recorded in Korea. This species at Iksan-si, JB, Korea in 2014 and at Jeonju-si, JB, Jeonju-si, JB, Seocheon-gun, CN, Korea in 2015.
Nymphs and adults cause damage to tree by sucking juice, fungi through secretion of wax, and reduction of plant assimilation due to the nectar of nymphs.
This species is known as the insect pest of various plant species as Citrus unshiu, Persea americana, Coffea arabica, Camellia oleifera and Jasminum nudiflorum in China(Wang et al., 2000). We confirmed six host plants in Korea and we expect the number of host plant will be increased according to its ecological adaptation. We have been confirming the other distributional locations in south part of Korea sporadically since the first discovery, 2013 and this species assumed to be introduced from the original range; especially southeast China. Serious damage due to this species has not been confirmed in Korea because the population and density are not high yet. However additional distributional locations have been confirming sporadically and the insect’s abundance found to be increasing. So the extension of distribution, damage and ecological adaptation of this species in Korea should be monitored continuously.
KSAE
