Brancucciana ( Rubriascopus ) orientalis Stehlík & Jindra, 2008

Brancucciana ( Rubriascopus) orientalis Stehlík & Jindra, 2008

Figs 1 View Figure 1 , 2 Chinese common name: 东方华红蝽 View Figure 2

Brancucciana ( Rubriascopus) orientalis Stehlík & Jindra, 2008: 632: Aukema et al. 2013: 402.

Diagnosis.

The subgenus Rubriascopus has two species, Brancucciana ( Rubriascopus) pygmaeus Distant, 1903 and Brancucciana ( Rubriascopus) orientalis Stehlík & Jindra, 2008 . In B. ( R.) pygmaeus , the legs and antennomeres are greyish yellow according to Stehlík and Jindra (2006 a: fig. 5) [vs legs and antennomeres black in B. ( R.) orientalis ].

The specimens recently collected from Guangxi and Hainan are morphologically mostly consistent with the original description of B. ( R.) orientalis according to the description by Stehlík and Jindra (2008). However, based on these Chinese specimens, the body is mostly red, with black markings (vs pale brown with a reddish tinge in the specimen of this species from Indonesia and the Philippines ( Stehlík and Jindra 2008). The structure of their male genitalia is consistent with B. ( R.) orientalis , therefore we consider the differences in colouration as intraspecific variation.

The male genitalia are redescribed in detail here (Fig. 2 View Figure 2 ). The pygophore is oval, the median pygophore process is armed with a posteriorly produced protrusion, its two lateral margins are parallel and the posterior margin of apical part is nearly straight and medially a little concave (Fig. 2 a, b View Figure 2 ); the ventral rim infolds and falls into genital chamber, and forms a special structural interior process, a cup-like sclerite of pygophore, its apical part acute, as shown in Fig. 2 c, d View Figure 2 ; the paramere is clavate, gradually attenuated, its apical part has a pair of minute denticles (Fig. 2 e View Figure 2 ); the phallosoma is elliptic; the phallobase is shown as in Fig. 2 f View Figure 2 ; the endosoma is shown in Fig. 2 g – i View Figure 2 , the vesical seminal duct (gonopore) extends to the apical part of the vesica.

Measurements

[male ( n = 1) / female ( n = 1), in mm]. Body length 9.88 / 11.66; maximal width of abdomen 4.13 / 4.70. Head length 1.30 / 1.70; Head width 1.78 / 1.94; length of synthlipsis 0.97 / 1.30; length of antennal segments I – IV = 1.27 / 1.46, 1.36 / 1.62, 0.91 / 0.97, 1.82 / 1.78; length of labial segments I – IV = 1.13 / 1.16, 1.30 / 1.30, 1.13 / 1.13, 1.13 / 0.97; length of pronotum 3.29 / 3.56; width of pronotum 3.40 / 3.73; length of anterior pronotal lobe 0.81 / 0.81; length of posterior pronotal lobe 1.13 / 1.30; length of scutellum 1.13 / 1.62; length of hemelytron 7.45 / 8.42.

Material examined.

2 males, 1 female, China, Guangxi, Longzhou, Nonggang , 2021 - VI- 14, by light, Ping Zhao & Yingqi Liu leg., deposited in CAU ; 1 female, China, Hainan, Dongfang city, Guangyin road , 2023 - VI- 28, Jianyun Wang leg., deposited in CAU .

Distribution.

China [ Guangxi (Longzhou), Hainan]; Indonesia, Philippines ( Stehlík and Jindra 2008). New record from China

Biology.

B. ( R.) orientalis demonstrates positive phototaxis when exposed to artificial light sources during nocturnal periods.