Arocatus nanus ( Breddin, 1900 )

Gao, Cuiqing, Kondorosy, Előd & Bu, Wenjun, 2013, A Review Of The Genus Arocatus From Palaearctic And Oriental Regions (Hemiptera: Heteroptera: Lygaeidae), Raffles Bulletin of Zoology 61 (2), pp. 687-704 : 693

Arocatus nanus ( Breddin, 1900)

( Fig. 1F, G )

Microcaenocoris nanus Breddin, 1900: 171 . Lectotype ( Gaedike, 1971: 118) (male): Indonesia: Sumbawa; DEIC.

Arocatus aurantium Zou & Zheng, 1981 in Zheng & Zou (1981: 17). Holotype (female), China, Yunnan, Xishuangbanna, Ganlanba; IZAS. New synonymy.

References. — Slater, 1964a: 149 (catalogue); Deckert, 1991: 367 ( nanus , redescription, figure); Slater & O’Donnell, 1995: 3 ( nanus , aurantium , catalogue); Hua, 2000: 187 ( aurantium , listed); Péricart, 2001: 38 ( aurantium , catalogue).

Diagnosis. — Body dorsally uniformly red, only eyes, antennae, legs and labium black, with semidecumbent and long erect white hairs. Posterior lobe of pronotum coarsely punctured, with distinct transverse impression and median keel elevated at middle of pronotum. Hemelytral membrane translucent, dark brown basally, gradually becoming paler apically. Pro- and mesosternum partially black. Genital segment black or red.

Type material examined. — Holotype of A. aurantium , female, China, Yunnan, Xishuangbanna [37°12'N 100°6'E], Ganlanba , 16 Mar.1957 ( IZAS) ; Paratype of A. aurantium , female, ibid. ( NKUM) .

Additional material examined. — CHINA: Yunnan: 1 male, Menghai, Xishuangbanna, coll. S. Y. Wang, 18 May 1958, alt. 1200–1600 m ( IZAS) ; Hainan: 1 female, Nada, coll. K. R. Huang, 30 Apr.1954 ( IZAS) ; 1 male, Yinggeling, Baisha, coll. G. Zheng, 20 Aug.2010, alt. 678 m ( NKUM) ; 1 female, ibid., except 22 Aug.2010, alt. 797 m ( NKUM) ; CAMBODIA: 1 male, Angkor Thom, day catch, coll. J. Constant, P. Grootaert & K. Smets, 23 May 2003 ( ISNB) ; INDIA: Tamil Nadu: 1 male, 15 km SE Kotagiri , 11°22'N 76°56'E, Kunchappanai , Tamil Nadu, coll. L. Dembicky & P. Pacholátko, 17–22 May 1997 ( NHMW) ; 1 female, S. India, Coimbatore, coll. P. S. Nathan, hw: Jul.1947 ( NMPC) ; LAOS ( South ): 2 males, Route (#23) Pakse – Paksong, Ban Itou, Bolaven Plateau , Champassak, 15°10'N 106°05'E, coll. E. Jendek & O. Sausa, 10–18 Apr.1999, alt. 800 m ( NHMW) ; 1 male, Louang Namtha, 21°09'N 101°19'E, Namtha → Muang Sing, coll. Vit Kubán, 5–31 May 1997, alt. 900–1200 m // Vit Kubán expedition “Laos 1997” ( MMBC); THAILAND: 2 females, Chiang Mai, San Pakia village , 19.19°N 98.50°E, coll. Vit Kubán; 1–15 May 1998, alt. 1400 m // Vit Kubán expedition “ Thailand 1998” ( MMBC) .

Host plants and bionomics. — Unknown.

Distribution. — Asia: China (* Hainan, Yunnan), * Cambodia, * India (Tamil Nadu), * Laos, Indonesia (Sumbawa), * Thailand. It is reported for the first time from Cambodia, India, Laos and Thailand.

Remarks. — Deckert (1991) synonymised Microcaenocoris with Arocatus , and gave a detailed redescription of A. nanus . The types of A. aurantium Zou & Zheng, 1981 were reexamined and it was concluded that this species is a junior synonym of A. nanus .

There are specimens deposited in HNHM and NHMW with minor colouration differences on tylus and sternum, however, with strikingly distinct male genitalia. They very likely belong to the genus Caenocoris .

Figures

Fig. 1. Arocatus spp., dorsal, ventral or lateral view. A, A. longiceps; B, C, A. melanocephalus; D, E, A. melanostoma; F, G, A. nanus; H, I, A. nicobarensis, one of the syntypes. Scale bars = 5.0 mm.