Minpolyphaga inexpectata, 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 : 515-518

Minpolyphaga inexpectata sp. nov.

( Figs 1‒24 )

Type material. HOLOTYPE: J (SWU): CHINA: FUJIAN: ʻYundongyan Scenery Spot [云洞岩ṂṜ区], Longwen District [ÄẊ区], Zhangzhou City [漳州市], N24º30’03.88’’, E117º44’43.57’’, alt. 50-59 m, 16.X.2017, Lu QIU leg .’ PARATYPES: 8 JJ 5 ♀♀ (SWU), same data as the holotype. Additional material examined. Some nymphs and oothecae (SWU), same data as the holotype.

Description. Male (holotype). General appearance. Measurements (mm): body length 11.5, overall length including tegmina and wings 15.7, antennal length 8.5, pronotum length × width: 3.2 × 5.1, tegmen length: 12.7. Body small, dark brown; ocelli, ante-clypeus, labrum, anterior margin of pronotum, apex of coxae, trochanters, and base of the 1 st tarsus yellowish ( Figs 1‒2 ).

Head slightly exposed below pronotum, brownish black. Vertex setose, face raised, median slightly concave. Eyes small, wide apart, interocular space greater than the distance between ocelli, sub-equal to the distance between antennal sockets. Ocelli moderate in size, connected by an ocellar ridge (sparsely setose), under which there are two shallow pits. Antennae slightly shorter than the body length, antennomeres 1‒9 smooth, the rest covered with short spinous pubescence. Post-clypeus small, smooth, the area above post-clypeus wrinkled; ante-clypeus wider than post-clypeus. Labrum quadrated, pubescent, concaved at distal margin. Maxillary palpi and labial palpi dark brown, apical segment of maxillary palpi slightly enlarged ( Fig. 6 ).

Pronotum transversely oval, widest in middle line, overall brown but anterior margin white-yellow; surface covered with many short spinous setae, anterior and lateral portions additionally with some long setae ( Fig. 5 ).

Tegmina and wings exceeding the end of abdomen about 3.5 mm. Tegmina unicolored brown, apex rounded, Sc swelling present; ScP with many branches; R stretched toward tegmental apex; M bifurcated medially, each branch re-bifurcated, the four sub-branches generally paralleled; CuA with paralleled branches in apical portion. Wing with single ScP; RA with 6 short branches; RP stretched toward wing apex; M straight, apical portion with two branches, one of which fused with one branch of CuA; CuA with 8 paralleled branches; CuP and Pcu simple and long; anal area regularly fan-like ( Figs 10‒11 ).

Legs. Surface with long setae; antero-ventral margin of fore femur with sparse and short spines, terminating in one larger spine (the terminal spine is only slightly larger than the rest of spines, the type of fore femur could be regarded as type A1) ( Fig. 8 ); middle and hind femur with a large spine at apex; tarsus 1 longer than the total length of tarsi 2 to 5 in middle and hind legs, but sub-equal in length in fore legs; all segments of tarsus without spines at apex in fore legs, while with 2‒4 spines at apex in tarsus 2‒5 in middle and hind legs (tarsus 4 and 5 each usually with 4 spines, tarsus 2 and 3 each usually with two spines); pulvilli and arolia small ( Fig. 9 ).

Abdomen. Supra-anal plate distinctly setose, apex slightly protruded; two median sclerites small; cerci short, apical segment oval ( Fig. 14 ). Subgenital plate brownish for the exposed part, styli symmetrical, slightly elongated ( Fig. 15 ).

Genitalia: well sclerotized. Left phallomere: anterior of L1 protruded, with a long process towards its left side, hind portion with long lobes; L2 curved; L3 long, apex of hook sharp; pda (a process on the L4N) well developed, long; L4M lamelliform, thin; L5 triangular, slightly thickened; L8 large, with an additional stick-like process associated. Right phallomere: R1M hollowed, irregular; R2 irregular, with two irregular appendages ( Figs 16‒18 ).

Variation. Male paratypes similar to the holotype. Overall length 13.7–15.8mm.

Female. Length 12.8–13.5 mm. Apterous. Light brown to dark brown; in dorsal view, pronotum brown, mesonotum and metanotum yellowish brown medially, abdomen yellowish brown, with some small brown spots, each tergum with two large brown spots laterally, from metanotum to the apices with a brownish line; in ventral view, vertex yellow, trochanters and tarsi yellowish ( Figs 3‒4 ). Vertex with numerous yellow setae, eyes small ( Fig. 7 ), antennae short. Pronotum semi-oval. Tarsomeres 2‒5 with four spines at apex in middle and hind legs. Supra-anal plate emarginated medially. Hind margin of subgenital plate slightly arched and protruded medially.

Nymph. Similar to the female, usually light brown, with many dark brown spots.

Ootheca. Small (5.9–6.1mm long, 2.9–3.2 mm wide), oval. Surface with longitudinal line, keel serrated, the serration curved, respiratory canals well developed in the serration ( Figs 12‒13 ). The size of the oothecae did not vary significantly in the examined samples.

Etymology. The species name is the Latin adjective inexpectatus, -a, -um refering to the unexpected discovery of the new species by the first author during his trip to Fujian. Natural history. Individuals of the new species inhabit the typical environment of Polyphagini , i.e. beneath dry and loose soil under big stones in the forest ( Figs 19‒24 ). In the type locality, this species seems to have high population density and can be easily found in the soil. Sometimes the soil is covered by dead leaves; the microhabitat is sheltered from rain by big stones.

Distribution. China (Fujian Province).

Figures

Figs 1‒4. Minpolyphaga inexpectata gen. & sp. nov., habitus. 1‒2 ‒ male holotype from Zhangzhou, Fujian (1 ‒ dorsal view; 2 ‒ ventral view). 3‒4 ‒ female paratype from Zhangzhou, Fujian (3 ‒ dorsal view; 4 ‒ ventral view). Scale bars: 5 mm.

Figs 5–13. Features of Minpolyphaga inexpectata gen. & sp. nov. 5 – pronotum, male; 6 – head, male; 7 – head, female; 8 – fore femur, male; 9 – part of tarsi and tarsal claws, male; 10 – tegmen; 11 – wing; 12 – ootheca; 13 – the serrations of oothecal. Scale bars: 1 mm for 5–7, 10–12; 0.2 mm for 8–9, 13.

Figs 14–18. Features of Minpolyphaga inexpectata gen. & sp. nov., male holotype. 14 – supra-anal plate, ventral view; 15 – subgenital plate, ventral view; 16 – genitalia, dorsal view; 17 – right phallomere (initial condition), right-ventral view; 18 – right phallomere (dissected), right-ventral view. Scale bars: 0.2 mm for all.

Figs 19‒24. Habitats of Minpolyphaga inexpectata gen. & sp. nov. 19 ‒ Mt. Yundongyan, Zhangzhou, Fujian; 20‒22 ‒ microhabitat of the new species (indicated by red arrows); 23‒24 ‒ living adult males of Minpolyphaga inexpectata gen. & sp. nov. (all photos by Lu Qiu).