Embrikstrandia unifasciata (Ritsema, 1896)

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

Embrikstrandia unifasciata (Ritsema, 1896)

Fig. 8

Zonopterus unifasciatus Ritsema, 1896: 376. TL: Vietnam (Annam); TD: MNHN.

Distribution.

Palaearctic Region: China (Anhui, Fujian, Gansu, Guangdong, Guangxi, Hainan, Henan, Hong Kong, Hubei, Hunan, Jiangxi, Sichuan, Shanxi, Taiwan, Zhejiang); India (Sikkim) ( Yiu 2009; Lin and Yang 2019; Danilevsky 2020). Oriental Region: India (Assam); Laos; Vietnam ( Huang et al. 2006).

Macau records.

Coloane, Ká-Hó near lighthouse, 1 Jun 2020, on flowers of Syzigium buxifolium , R Perissinotto; Coloane, A-Mà Cultural Village, 17 Jun 2020, on flowers of Acronychia pedunculata , R Perissinotto (IZCAS); St. Francis Xavier’s Parish [Coloane], 20 May 2021, Lynette Clennell (https://www.inaturalist.org/observations/79506657).

Remarks.

In Macau, this species has a total length of 21-27 mm and a maximum width of 6-8.5 mm. Three out of a total of four specimens observed during the study exhibit an expanded pale-yellow band across the elytra reaching all the way to the basal margin (Fig. 8 ), in a similar fashion to that shown by Embrikstrandia vivesi Bentanachs, 2005. However, the antennal segments 1-4 and all the legs are entirely black as is typical of E. unifasciata . Adult specimens appear to be active only in May-June and feed on flowers of Syzigium buxifolium , Dalbergia benthamii and Acronychia pedunculata during the hottest part of the day. In nearby Hong Kong, where this species has been erroneously reported as the related species E. bimaculata (White, 1853) (cf. Huang et al. 2006; Yiu 2009; Yiu and Yip 2011), larvae have been reported to bore into wood of Zanthoxylum sp. and Tetradium glabrifolium ( Yiu 2009).

Figures

Figure 8. Embrikstrandia unifasciata (Ritsema, 1896): dorsal (A) and lateral (B) views of specimen observed on Coloane Heights on 17 Jun 2020 (photographs: LC).