Polyzonus sinensis (Hope, 1842)

Lin, Mei-Ying, Perissinotto, Renzo & Clennell, Lynette, 2021, Census of the longhorn beetles (Coleoptera, Cerambycidae and Vesperidae) of the Macau SAR, China, ZooKeys 1049, pp. 79-161 : 79

Polyzonus sinensis (Hope, 1842)

Fig. 9

Promeces sinensis Hope, 1842: 63. TL: China (Guangdong); TD: MNHN.

Distribution.

Palaearctic Region: China (Chongqing, Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hong Kong, Hunan, Jiangxi, Jilin, Liaoning, Sichuan, Taiwan, Yunnan); India (Sikkim) ( Lin and Yang 2019; Danilevsky 2020). Oriental Region: Laos; Myanmar; Thailand; Vietnam ( Lin and Yang 2019).

Macau records.

Coloane, 20 May 1994, MW Ng (CIAM); Parque Natural de Taipa Grande, 24 May 2020 5:36, Wai Chan (https://www.inaturalist.org/observations/70479773); ibidem 8 May 2021 17:07, Kit Chang (https://www.inaturalist.org/observations/77868888); Great Taipa, 8 May 2021, perched on leaves on road margin, R Perissinotto & Lynette Clennell (IZCAS).

Remarks.

Easton (1993) reported this species as " Chelidonium sinense (Hope)" but it seems most likely that the main species involved in his observations was actually C. argentatum and not Polyzonus sinensis , given the laterally expanded metatibia and short tarsal segments exhibited by the typical specimen illustrated in his work ( Easton 1993: 47). During the current census, P. sinensis was only observed on three occasions and always on Great Taipa Hill. The total length of these specimens varies between 23 and 26 mm, while their maximum width lies in the range of 5-6 mm. Adult specimens appear to have their peak of activity in May and have so far only been observed feeding on flowers of Schima superba during the hottest part of the day. Yiu (2009) reported that in Hong Kong the larvae of this species bore into Citrus plants and Hua (2002) also listed Acacia spp. as host plants in its broader distribution range.

Figures

Figure 9. Polyzonus sinensis (Hope, 1842): dorsal (A) and lateral (B) views of specimen observed on Great Taipa Hill on 8 May 2021 (photographs: LC).