Acanthosoma crassicaudum Jakovlev 1880

Tsai, Jing-Fu & Rédei, Dávid, 2015, The genus Acanthosoma in Taiwan (Hemiptera: Heteroptera: Acanthosomatidae), Acta Entomologica Musei Nationalis Pragae 55 (2), pp. 625-664 : 644-645

Acanthosoma crassicaudum Jakovlev 1880

Acanthosoma crassicaudum Jakovlev, 1880: 386 , 390. Lectotype ( DERZHANSKY et al. 2002: 362): J, Russia: Vladivostok; ZMAS.

Acanthosoma glaucum Esaki, 1916: 125 . Syntypes: J, ♀, Japan: Honshiu [= Honshu]: Mt. Minomo and Kyoto; ELKU. Synonymized by ESAKI (1926: 200).

Acanthosoma crassicaudum: KERZHNER (1964: 364) (records), KANYUKOVA (1988: 914) (in key, figure, distribution), KWON et al. (2001: 366) (catalogue, host plants, records,distribution), GÖLLNER- SCHEIDING (2006:167) (catalogue, distribution), YAMAMOTO et al. (2009: 33) (host plant), YAMAMOTO & HAYASHI (2011: 150) (in key), YAMAMOTO & HAYASHI (2012: 503) (redescription, host plants, distribution).

Acanthosoma crassicauda: LETHIERRY & SEVERIN (1893: 252) (catalogue, distribution), KIRKALDY (1909: 171) (catalogue, distribution), ESAKI (1926: 200) (type material, diagnostic characters, records, distribution, synonymy), HOFFMANN (1935: 101, 184) (catalogue, distribution), ISHIHARA (1947: 69) (listed, figures), ESAKI (1950: 203) (redescription, habitus, distribution), MIYAMOTO (1962: 81) (redescription, host plant, phenology, distribution), LEE (1971: 214) (in key), 217 (redescription, photo, figure, records, distribution), 501 (catalogue, distribution), HIURA (1977: 106) (listed, figure, distribution), JOSIFOV & KERZHNER (1978: 165) (records), VINOKUROV et al. (2010: 225) (catalogue, distribution), ZHENG & LIN (2013: 99) (redescription, photo).

Material examined. TAIWAN: MIAOLI CO.: Mt.Xue, black forest [ Abies kawakamii forest], ca. 3300 m, 12.xii.2010, leg.Y.C. Liao (1 ♀ NCHU). NANTOU CO.: Aowanda National Forest Recreational Area, near bird watching platform, 1265 m, 30.v.2011, UV light, leg. W.M. Hunting (2 ♀♀ NCHU).

Diagnosis. A large, robust species (body length 17.5–19.5 mm) readily recognizable based on the following combination of characters: humeri rounded, not produced; connexival plates with broad (as wide as or wider than tibia) black markings enclosing intersegmental sutures; posterolateral angle of pronotum with a small, triangular process directed posteriad and extending over base of corium; genital capsule of male large, robust, with short, broad, apically rounded lateral projections not surpassing apex of membrane, ventrally densely pilose, provided with 1+1 pigmented denticles subapically and 1+1 denticles proximally; posterior margin of laterotergites VIII of female broadly rounded. ESAKI (1926, 1950), ISHI- HARA (1947), MIYAMOTO (1962), LEE (1971), HIURA (1977), KANYUKOVA (1988), YAMAMOTO & HAYASHI (2012) and ZHENG & LIN (2013) provided redescriptions and illustrations which are useful for recognizing this species.

Bionomics. The species feeds on Prunus buergeriana Miq. (Rosaceae) in Japan ( YAMAMOTO et al. 2011). Several other Prunus species ( P. avium (L.) L., P. donarium Siebold , P. glandulosa Thunb. , P. ishidoyana Nakai , P. nakaii H.Lév. , P. leveilleana Koehne , P. mume Siebold & Zucc. , P. padus L., P. salicina Lindl. , P. sargentii Rehder , P. serrulata Lindl. , P. yedoensis Matsum. ) were recorded as its host plants in Korea ( KWON et al. 2001). The host plants in Taiwan are unknown.

Distribution. The species occurs in the Russian Far East, Korea and Japan. It was recorded from Taiwan by ZHENG & LIN (2013) without precise locality; we present the first exact record for the country. It is apparently rare all over its distribution area. It was recorded from

Fujian Province (Jianyang) of China by HSIAO & LIU (1977). The specimen photographed by the authors ( HSIAO & LIU 1977, plate 29 fig. 409) (label data: Fujian, Jianyang, Huangkeng, 8.vi.1965, leg. S.L. Liu, preserved in NKUM) was examined in connection with the present study, and it is identified as a female of A. denticaudum Jakovlev, 1880 . The subsequent records of A. crassicaudum from Fujian ( CHAO 1982, LIN et al. 1999, HUA 2000) are apparently based on HSIAO & LIU (1977). Due to the confusion about the identity of this species in the Chinese literature we consider the record from Henan ( ZHENG et al. 1999) as questionable. We could not see any specimens which could prove occurrence of the species in the country, therefore, although the species likely occurs in the northeastern part of China, it is deleted from the Chinese fauna until voucher specimens could be located.

Summary of known records: RUSSIA: FAR EAST TERRITORY: Primorsky Krai ( KERZHNER 1964, VINOKUROV et al. 2010). — JAPAN: HONSHU: Ueda!, Nagano! (SEHU); KYUSHU: Mt. Hiko!, Fukuoka!, Kirishima! (SEHU); SHIKOKU ( YAMAMOTO & HAYASHI 2012). — KOREA: NORTH ( KWON et al. 2001); SOUTH: Kyongsangbuk Prov., near Kimchon, Chikchi-sa! (HNHM). — CHINA?: HENAN? ( ZHENG et al. 1999). — TAIWAN: MIAOLI CO.!; NANTOU CO.!