Allacta Saussure & Zehntner, 1895

He, Jia-Jun, Zheng, Yu-Hong, Qiu, Lu, Che, Yan-Li & Wang, Zong-Qing, 2019, Two new species and a new combination of Allacta (Blattodea, Ectobiidae, Pseudophyllodromiinae) from China, with notes on their behavior in nature, ZooKeys 836, pp. 1-14 : 3-4

Allacta Saussure & Zehntner, 1895

Allacta Saussure & Zehntner, 1895: 45 (New name for Abrodiaeta Brunner von Wattenwyl, 1893). Type species: Abrodiaeta modesta Brunner von Wattenwyl, 1893, by selection; Roth 1991: 996; Roth 1993: 361; Roth 1995: 51; Roth 1996: 235; Wang et al. 2014: 440.

Arublatta Bruijning, 1947: 224. Type species: Blatta punctata Walker, 1869. Synonymized by Roth 1991: 996.

Pseudochorisoblatta Bruijning, 1948: 90. Type species: Phyllodromia interrupta Hanitsch, 1925, by selection. Synonymized by Princis 1965: 151.

Euhanitschia Princis, 1950: 178. Type species: Phyllodromia diagrammatica Hanitsch, 1923. Synonymized by Roth 1996: 235.

Compsosilpha Princis, 1950: 180. Type species: Chorisoblatta karnyi Hanitsch, 1928. Synonymized by Roth 1996: 235.

Diagnosis.

Body pale brown to blackish brown, mostly yellowish brown. Clypeus normal, not thickened. Pronotum usually oval, wider than length. Tegmina and wings usually fully developed, a few slightly reduced ( T. hainanensis ). Tegmina with M, CuA oblique, hind wings with R straight, sometimes forked, M and CuA usually straight or nearly so, latter with 1-6 (usually 4 or 5) complete branches; apical triangle small, reduced or absent. Anteroventral margin of front femur Type B2 or B3; pulvilli present only on the fourth tarsomere of all legs, tarsal claws symmetrical and unspecialized, arolia present. Male abdominal terga unspecialized. Male genitalia usually have three principal phallomere sclerites, the hook-like phallomere on right side, the median, and the left; most species have an accessory median phallomere. Ootheca not rotated prior to deposition.

Note.

Roth (1996) and Wang et al. (2014) discussed the difference among Allacta , Sundablatta , and Pseudophyllodromia , but actually, Allacta is closely related with the three genera Margattea , Balta , and Sorineuchora according to Wang et al. (2017), which are also under the subfamily Pseudophyllodromiinae. The most striking difference between Allacta and its closely related genera is pulvilli only present on the fourth tarsomere of all legs; or anteroventral margin of front femur Type B2 or B3. It is possible that Allacta and Balta prove to be synonym in the future by molecular method.

Remarks.

Roth (1993) erected three species groups under Allacta based on color patterns and male interstylar margin, viz. funebris species group, hamifera species group, and polygrapha species group. According to Roth (1993), these three species can be put in the hamifera species group, A. bruna sp. n. by having a dark pronotum and keel-like ridge at interstylar margin (Figs 4, 11) and A. alba sp. n. and A. hainanensis (Liu et al. 2017) comb. n. by the two close lobes between the styli (Figs 23, 34).

Checklist of Allacta species from China

Allacta bimaculata Bey-Bienko, 1969: 858. China (Yunnan, Guangxi)

Allacta ornata Bey-Bienko, 1969: 859. China (Yunnan, Hainan)

Allacta robusta Bey-Bienko, 1969: 860. China (Yunnan)

Allacta transversa Bey-Bienko, 1969: 859. China (Hainan); Vietnam

Allacta xizangensis Wang et al., 2014: 449. China (Xizang)

Allacta alba sp. n. China (Zhejiang)

Allacta bruna sp. n. China (Hainan)

Allacta hainanensis (Liu et al., 2017), comb. n. China (Hainan)

Key to species of Allacta from China (males)