Minpolyphaga, Qiu & Wang & Che, 2019

Qiu, Lu, Wang, Zong-Qing & Che, Yan-Li, 2019, Minpolyphaga inexpectata, a new genus and species of Polyphagini (Blattodea: Corydiidae: Corydiinae) from southeast China, Acta Entomologica Musei Nationalis Pragae 59 (2), pp. 513-518 : 515

Minpolyphaga gen. nov.

Type species. Minpolyphaga inexpectata sp. nov., here designated.

Diagnosis. This new genus resembles Eupolyphaga in general appearance, but it can be readily distinguished from the latter by the following characters: 1) the body of both sexes is distinctly smaller from any species in Eupolyphaga (male: 13.7‒15.8 mm in this new genus, 22.3‒36.8 mm in Eupolyphaga ; female: 12.8‒13.5 mm in this new genus, 15.2‒30.2 mm in Eupolyphaga ); 2) in the male of Minpolyphaga , the eyes are small, wide apart, the interocular space is greater than the distance between ocelli, and sub-equal to the distance between antennal sockets, whereas in Eupolyphaga , the eyes are large, the interocular space is narrower than the distance between ocelli and the antennal sockets, sometimes sub-equal to the distance between ocelli; 3) in the female, the ocelli are absent in Minpolyphaga , but are present in Eupolyphaga (although they are reduced, in the form of two white spots); 4) the male tegmen is characterized by a narrowed anal area, while the corresponding area is not narrowed in Eupolyphaga ; 5) the posterior margin of the male subgenital plate protrudes slightly, while in Eupolyphaga it is curved and somewhat concave; 6) phallomere L8 is provided with two sclerites, one of them distinctly stick-like, whereas Eupolyphaga possesses an L8 phallomere composed of a single lamelliform sclerite; 7) the R2 phallomere of Minpolyphaga is provided with two appendages, while the R2 of Eupolyphaga lacks them.

Description. Male. Body small. Head triangularly rounded; eyes wide apart, ocelli present, with ocellar ridge; frons flat, with two shallow pits between ocelli; antennae slender; clypeus divided into ante- and post-clypeus; labrum wide, distal margins round. Pronotum transversely oval, entirely covered with setae. Tegmina and wings fully developed, exceeding the end of abdomen (flyable); tegmina with Sc swelling present, anal area narrowed. Legs regular, antero-ventral margin of fore femur with sparse and short spines (type A); tarsal claws simple, symmetrical, arolia present. Supra-anal plate transverse, two small sclerites present, cerci short. Subgenital plate roundly quadrated, hind margin setose, styli small, similar, wide apart. Genitalia: L1 with wide apart hind lobes; L8 with two sclerites, one is lamelliform, the other is stick-like; R2 thickened, with a large boundary connected with R3, two appendages present under R2.

Female. Wingless, with typical appearance of Polyphagini , body covered with many long setae. Head large, rounded; eyes small, ocelli absent, antennae short. Legs short; arolia absent. Supra-anal plate transverse, hind margin emarginated medially, cerci short. Subgenital plate wide, apex protruded and bulged, with a small incision.

Etymology. Min [Oi] refers to the provincial abbreviation of Fujian Province. Minpolyphaga means ʻPolyphagini cockroach from Fujian’. The gender is feminine.

Distribution. China (Fujian).

Remarks. This new genus can be assigned to the tribe Polyphagini due to the apterous females.

Key to genera of tribe Polyphagini from China (males)

1. Tegmina without Sc swelling. .......................................... .............................................. Polyphaga Bol í var, 1882

– Tegmina with Sc swelling. ............................................. 2

2. Arolia absent. ..................................................................... ...................... Epipolyphaga Qiu, Che & Wang, 2019

– Arolia present. ................................................................. 3

3. Body large, 22.3‒36.8 mm including tegmina; subgenital plate curved and slightly concave; R2 without two appendages. ................... Eupolyphaga Chopard, 1929

– Body small, 13.7‒15.8 mm including tegmina; subgenital plate slightly convex; R2 with two appendages. .... ............ Minpolyphaga Qiu, Wang & Che , gen. nov.