Pycnoscelus indicus ( Fabricius, 1775 )

Pycnoscelus indicus ( Fabricius, 1775) View in CoL

Fig. 2 View Figure 2

Blatta indica Fabricius, 1775: 272.

Pycnoscelus indicus View in CoL : Roth 1967: 774; Roth 1998: 99.

Material examined.

China • 5 males & 3 females; Fujian Prov., Putian City, Meizhou Island ; 22–23 July 2013; Shun-Hua Gui & Yan Shi leg. • 2 males; Guangdong Prov., Zhongshan City, Zimaling Park , 11 Oct. 2018; Ke-Liang Wu leg. • 1 female; Guangxi Prov., Baise City, Renzhuang Township, Tengmao Village , Nongli tun ; 9–13 July 2015; Jian-Yue Qiu leg. • 1 male; Guangxi Prov., Longzhou County; Nonggang Nature Reserve ; 29–30 June 2015; Lu Qiu & Qi-Kun Bai leg. • 11 males & 2 females; Yunnan Prov., Yuxi City , Yuanjiang County; 533 m; 22 May 2018; Lu Qiu, Wen-Bo Deng & Zhi-Wei Dong leg. Japan • 2 males & 5 females; Okinawa, Mt. Yonahadake ; 222 m; 10 Aug. 2016; Jian-Yue Qiu & Hao Xu leg.

Diagnosis.

This species is characterized by its pronotum with a broad anterior and narrow anterolateral yellowish band (Fig. 2 E View Figure 2 ), a feature also presents in P. surinamensis . The two species are difficult to distinguish in appearance. The key distinction between P. indicus and P. surinamensis lies in their reproductive modes: P. indicus reproduces bisexually, while P. surinamensis reproduces parthenogenetically ( Roth 1967).

Supplementary description of male.

Hind margin of supra-anal plate variable, weakly incised medially, or entire and convexly rounded (Fig. 2 G View Figure 2 ). Sclerotized level and shape of subgenital plate variable: the inner plate nearly symmetrical or strongly asymmetrical, lateral projection on left posterolateral angle distinct or not (Fig. 2 H – J View Figure 2 ). Male genitalia: Right phallomere with caudal part of sclerite R 1 T widened; R 2 slightly curved; the projection arising from the junction of R 1 T and R 2 elongate; R 3 forked caudally; R 4 plate-like, close to the caudal part of R 1; R 5 absent (Fig. 2 K, L View Figure 2 ). Sclerite L 2 D divided into basal and apical parts: the basal part straight; the apical part croissant-shaped with outer margin toothed; apical membrane covered with heavy chaetae (Fig. 2 M View Figure 2 ). Sclerite L 3 with hook short and robust, sclerite L 4 U divided into two parts (Fig. 2 N View Figure 2 ).

Measurements (mm).

Body length including tegmen: male 15.8–17.2, female 16.4–18.6; pronotum length × width: male 4.0–4.4 × 5.4–5.9, female 4.3–5.1 × 6.0–6.7; tegmen length: male 13.8–15.3, female 12.7–15.0.