Sasajiscymnus parenthesis ( Weise, 1923 )

TONG, JUNBO, CHEN, XIAOSHENG, ZHANG, XIAONING, HUO, LIZHI, WU, GANG, PENG, ZHENGQIANG & WANG, XINGMIN, 2022, A review of the genus Sasajiscymnus Vandenberg, 2004 from China (Coleoptera, Coccinellidae), Zootaxa 5207 (1), pp. 1-104 : 34-35

Sasajiscymnus parenthesis ( Weise, 1923)

( Figs 1k , 23 )

Chinese name: 弧Ṅḧ瓢•

Nephus parenthesis Weise, 1923: 187 (type locality: Taiwan, China).

Pseudoscymnus montanus: Yang 1971: 91 .— Pang et al. 2004: 88; Kovář 2007: 582. Synonymized by Yu, 2011: 128.

Sasajiscymnus parenthesis: Yu 2011: 128 — Iqbal et al. 2020: 386.

Diagnosis. This species is similar to S. quinquepunctatus ( Weise, 1923) in the characters of male genitalia, but can be distinguished from the later by parameres slightly shorter than penis guide ( Fig. 23g ). In S. quinquepunctatus , parameres are about 3/4 as long as penis guide ( Fig. 2n ).

Description. TL: 1.76–2.44 mm, TW: 1.34–1.86 mm, TH: 0.79–1.08 mm.

Body oval, moderately convex, surfaces covered with short pubescence ( Figs 23a–c ). Head yellow with interocular distance distinctly greater than eye width in frontal view. Pronotum yellow. Scutellar shield black. Elytra yellowish brown with parenthesis-shaped black markings. Ventral surfaces yellow to black. Legs yellow. Abdominal postcoxal lines incomplete, slightly recurved toward the base of ventrite ( Fig. 23d ).

Male genitalia: Penis stout, penis capsule with stout outer arm and long inner one, apex of penis distinctly expanded with membranous appendage ( Figs 23e–f ). Penis guide with prominent keel at base in lateral view, then tapering towards pointed apex; parameres conspicuously inflated, slightly shorter than penis guide, with a tuft of long setae at apex; penis guide approximately parallel sided for basal 1/ 3 in ventral view, then gradually narrowing to apex ( Figs 23g –h ).

Female genitalia: Coxites elongate, triangular; styli well developed with terminal setae; spermatheca distinctly curved, with basal ramus and elongate nodulus.

Material examined. China: Taiwan: 1♂ 1♀, Aowanda, Jenai Town , Nantou County, 1280 m, 21.X.2012, Wang XM leg ; 1♀, Ali Mountains , Chiayi County, 1800 m, 22.X.2012, Wang XM leg ; 1♂ 2♀, Dabang Village, Alishan Mountains , Chiayi County, 960–1600 m, 24.X.2012, Wang XM leg ; 1♂, Tengjhih , Kaohsiung City, 370–1450 m, 25.X.2012, Wang XM leg ; 2♀, Maolin District , Kaohsiung City, 365–515 m, 26.X.2012, Wang XM leg ; 1♂ 4♀, Jhihben, Taitung City , 230 m, 28.X.2012, Wang XM leg ; 2♂, Nanheng, Chihshang Town , Taitung County, 679 m, 29.X.2012, Wang XM leg ; 1♂ 2♀, Taroko National Park , Hualien County, 200–912 m, 30.X.2012, Wang XM leg ; 1♀, Beiheng Highway , Yilan County, 300–1500 m, 1.XI.2012, Wang XM leg.

Distribution. China (Taiwan).

Figures

FIGURE 1. Body size and colouration of Chinese Sasajiscymnus spp.: a S. amplus (Yang & Wu, 1972), b S. nakanei (Araki, 1963), c S. intricatus Tong & Wang sp. nov., d S. tumidus Tong & Wang sp. nov., e S. ocellatus (Yu, 2000), f S. dapae (Hoàng, 1978), g S. sylvaticus (Lewis, 1896), h S. ancistroides (Pang & Huang, 1986), i S. atypicus Tong & Wang sp. nov., j S. kuriharai Kitano, 2012, k S. parenthesis (Weise, 1923). Scale bars: 1 mm

FIGURE 2. Main characters of Sasajiscymnus, S. quinquepunctatus (Weise, 1923): a head, frontal view, b mandible, left, dorsal view, c mandible, right, dorsal view, d labrum, e antenna, f maxilla, g labium, h prothorax, ventral view, i prosternum, ventral view, j hind leg, k abdomen, male, m–o male genitalia: m apex of penis, l penis, n tegmen, lateral view, o tegmen, ventral view. Scale bars: 0.1 mm

FIGURE 23. S. parenthesis (Weise, 1923): a dorsal view, b lateral view, c frontal view, d abdomen, male, e–h male genitalia: e