The genus Spathius Nees is the largest and very polymorphic genus in the subfamily Doryctinae (Belokobylskij, 2003). This genus comprises about 390 species, which have been known mostly from the Oriental and Australasian regions (Belokobylskij, 2003; Tang et al., 2015). About 70 species have been recorded in the East Palaearctic region (Belokobylskij and Maeto, 2009; Yu et al., 2012). Korean species of the genus were studied by Watanabe (1948), Kim (1963, 1970), Papp (1987, 1992), Ku et al. (2001), Ku (2010), Belokobylskij et al. (2012), and Kim et al. (2016).
The members of Spathius species are idiobiont ectoparasitoid of various Coleopteran larvae: Anobiidae, Anthribidae, Bostrichidae, Buprestidae, Cerambycidae, Cleridae, Curculionidae, Dryophthoridae, Eucnemidae, Lyctidae, Ptinidae, and Scolytidae (Belokobylskij and Maeto, 2009). Most species of this genus have also been recorded from hymenopteran (Cynipidae and Xiphydriidae) and lepidopteran (Lymantriidae, Sesiidae, Tineidae, and Tortricidae) larvae (Belokobylskij and Maeto, 2009). In this study, we report a species of the subfamily, Spathius depressithorax Belokobylskij, for the first time from Korea. Also, a total of 13 known species of the genus SpathiusNees, 1819 in Korea is presented with brief information of the species.
Materials and Methods
Material examined in this study was deposited at the Science Museum of Natural Enemies, Geochang, Korea (SMNE). The specimens were photographed with Canon 1ds Mark II (MP-E65 mm macro lens). Terminology used in this paper follows that of van Achterberg (1993). Abbreviations used in the present study are as follows: GB, Prov. Gyeongbuk; GN, Prov. Gyeongnam; GW, Prov. Gangwon.
Results and Discussion
Systematic accounts
Family Braconidae Nees, 1811
Subfamily Doryctinae Förster, 1862
Genus SpathiusNees, 1819 자루배고치벌속(신칭)
SpathiusNees, 1819: 301; Nixon, 1943:190; Shenefelt and Marsh, 1976: 1386; Belokobylskij, 2003: 348. Type species (by monotypy): Cryptus clavatus Panzer, 1809.
Diagnosis. Eyes glabrous or rarely sparsely setose. Vein Cu1a of fore wing sometimes interstitial, but often not interstitial and arising before middle of distal margin of subdiscal cell; subdiscal cell closed. Vein cu-a of hind wing present; vein M+Cu of hind wing 0.4-0.6 times as long as vein 1-M. Ovipositor from rather short to very long, as long as or longer than body.
Spathius depressithoraxBelokobylskij, 1998 납작가슴자루 배고치벌(신칭) (Figs. 1, 2)
Spathius depressithoraxBelokobylskij, 1998: 98; 2003: 384; Belokobylskij and Maeto, 2009: 561; Tang et al., 2015: 40.
Diagnosis. This species is closely related to S. exarator, but it can be distinguished by the mesosoma distinctly depressed, the mesoscutum weakly and gently elevated above pronotum, and 4th and 5th tergites basally reticulate-punctate.
Redescription. Female (Fig. 1). Body length 4.2 mm; fore wing length 3.4 mm. Antenna with 34 segments; 1.25 times longer than body. Frons densely and coarsely striate. Face entirely rugose. Mesosoma slightly distinctly depressed, its length 2.4 times maximum height. Mesoscutum weakly and gently elevated above pronotum. Vein r of fore wing arising almost from middle of pterostigma; vein CU1a not interstitial, arising from anterior 0.3 of distal margin of subdiscal cell; marginal cell not shortened; second submarginal cell weakly narrowed distally. Vein m-cu of hind wing long, curved, distinctly infuscate, antefurcal. Petiole weakly curved ventrally in lateral view; length of petiole 2.5 times its apical width. 4th and 5th tergites basally reticulate-punctate. Ovipositor almost straight. Ovipositor sheath 1.3 times longer than metasoma, 0.7 times as long as body. Body reddish-brown; legs pale reddish brown; all tibiae pale yellow.
Male (Fig. 2). Body length 2.0-2.7 mm; fore wing length 1.6-2.3 mm. Mesosoma length 2.0-2.4 times longer than maximum height. Length of petiole 1.75-1.8 times its apical width. Otherwise similar to female.
Material examined. [KOREA] 1♂, Mt. Bangtae, Misan, Sangnam, Inje, GW, 12 viii 1986 (Deok-Seo Ku); 1♂, Judong, Yeohang, Haman, GN, 1 vi 1987; 1♀, Mt. Mirim, Galsan, Jaesan, Bonghwa, GB, 22 vii 1997 (J.S. Jeon)-coll. SMNE.
Distribution. Korea (new record), China (Hebei, Zhejiang), Japan, Russia (Khabarovsk Krai, Primorsky Krai, Sakhalin Oblast).
Host. Unknown.
Annotated checklist of the genus Spathius in Korea
Genus SpathiusNees, 1819 자루배고치벌속(신칭)
1. Spathius cavusBelokobylskij, 1998 굴자루배고치벌(신칭)
Spathius cavusBelokobylskij, 1998: 106; Ku et al., 2001: 95; Belokobylskij, 2003: 381; Belokobylskij and Maeto, 2009: 551; Tang et al., 2015; 32.
Distribution. Korea, China, Japan, Russia (Far East).
2. Spathius depressithoraxBelokobylskij, 1998 납작가슴자루 배고치벌(신칭)
Spathius depressithoraxBelokobylskij, 1998: 98; 2003: 384; Belokobylskij and Maeto, 2009: 561; Tang et al., 2015; 40.
Distribution. Korea, China, Japan, Russia (Far East).
3. Spathius exarator (Linnaeus, 1758) 주름자루배고치벌(신칭) Ichneumon exaratorLinnaeus, 1758: 564.
Spathius exarator: Marshall, 1885: 61; Watanabe, 1937: 35; Telenga, 1941: 33; Nixon, 1943: 198; Shenefelt and Marsh, 1976: 1400; Belokobylskij and Tobias, 1986: 28; Belokobylskij and Maeto, 2009: 571; Tang et al., 2015; 42.
Distribution. Korea, China, Japan, New Zealand, Mongolia, Russia (Far East, Siberia, European part), all Europe.
4. Spathius fasciatusWalker, 1874 띠자루배고치벌(신칭)
Spathius fasciatusWalker, 1874: 307; Watanabe, 1937: 37; Nixon, 1943: 237; Shenefelt and Marsh, 1976: 1403; Papp, 1987: 158; Belokobylskij, 1998: 93; Ku et al., 2001: 95; Belokobylskij and Maeto, 2009: 575; Tang et al., 2015; 43.
Distribution. Korea, Japan, Russia (Far East).
5. Spathius galinae Belokobylskij et Strazanac, 2012 호리비단 벌레살이고치벌(신칭)
Spathius galinae Belokobylskij et Strazanac, in Belokobylskij et al., 2012: 167; Tang et al., 2015; 48.
Distribution. Korea, China, Russia (Far East).
6. Spathius generosusWilkinson, 1931 넓은자루배고치벌 (신칭)
Spathius generosusWilkinson, 1931: 263; Nixon, 1943: 199; Shenefelt and Marsh, 1976: 1404; Belokobylskij, 1998: 104; Ku et al., 2001: 95; Belokobylskij and Maeto, 2009: 585; Tang et al., 2015; 49.
Distribution. Korea, China, India, Japan, Russia (Far East).
7. Spathius ibarakiusBelokobylskij and Maeto, 2009 알락 하늘소살이고치벌
Spathius ibarakiusBelokobylskij and Maeto, 2009: 602; Tang et al., 2015; 56; Kim et al., 2016: 286.
Distribution. Korea, Japan.
8. Spathius japonicus Watanabe, 1937 동아시아자루배고치벌 (신칭)
Spathius japonicasWatanabe, 1937: 36; Nixon, 1943: 279; Shenefelt and Marsh, 1976: 1406; Belokobylskij, 1998: 84; Ku et al., 2001: 96; Belokobylskij and Maeto, 2009: 615; Tang et al., 2015; 56.
Distribution. Korea, China, Japan.
9. Spathius leschiiBelokobylskij, 1998 한중일러자루배고치벌 (신칭)
Spathius leschiiBelokobylskij, 1998: 92; Ku et al., 2001: 96; Belokobylskij and Maeto, 2009: 628; Tang et al., 2015; 60.
Spathius lesovik: Belokobylskij, 1998: 92; Ku et al., 2001: 97; Belokobylskij, 2003: 430. Syn. by Belokobylskij and Maeto, 2009.
Distribution. Korea, China, Japan, Russia (Far East).
10. Spathius phymatodisFischer, 1966 민띠하늘소살이고치벌 (신칭)
Spathius phymatodisFischer, 1966: 219; Tobias, 1971: 197; Shenefelt and Marsh, 1976: 1413; Belokobylskij and Tobias, 1986: 29; Belokobylskij, 1998: 100; Ku et al., 2001: 97; Belokobylskij, 2003: 393; Belokobylskij and Maeto, 2009: 685; Tang et al., 2015; 86.
Distribution. Korea, China, France, Hungary, Italy, Japan, Lithuania, Mongolia, Russia (European part, Urals, East Siberia, Far East), Spain, Ukraine.
11. Spathius reticulatusChao and Chen, 1965 그물등자루배 고치벌(신칭)
Spathius reticulatusChao and Chen, 1965: 106; Shenefelt and Marsh, 1976: 1413; Belokobylskij, 1989: 51; 1988: 80; Ku et al., 2001: 100; Belokobylskij, 2003: 485; Chen and Shi, 2004: 158; Belokobylskij and Maeto, 2009: 701; Tang et al., 2015; 101.
Distribution. Korea, China, Japan, Russia (Far East).
12. Spathius rubidus (Rossi, 1794) 적갈색자루배고치벌(신칭)
Ichneumon rubidusRossi, 1794: 110.
Spathius rubidus: Nees, 1834: 14; Marshall, 1888: 195; Telenga, 1941: 38; Nixon, 1943: 200; Shenefelt and Marsh, 1976: 1415; Belokobylskij and Tobias, 1986: 31; Belokobylskij, 1998: 107; Ku et al., 2001: 99; Belokobylskij and Maeto, 2009: 705.
Distribution. Korea, Armenia, Japan, Kazakhstan, Morocco, Russia (Far East), Turkey, all Europe.
13. Spathius verustusChao, 1977 가시고치벌(나무좀살이 고치벌)
Spathius verustusChao, 1977: 208; Chen and Shi, 2004: 166; Tang et al., 2015; 119.
Spathius radzayanus: Ratzeburg, 1848: 43; Watanabe, 1948: 95; Kim, 1970: 741; Shenefelt and Marsh, 1976: 1414; Belokobylskij, 1998: 107; Ku et al., 2001: 97; Chen and Shi, 2004: 157; Belokobylskij and Maeto, 2009: 698; Tang et al., 119.
Distribution. Korea, China, Japan, Mongolia, Russia (Far East), Central and Western Europe.