Asymmetritania vietnamensis (Storozhenko, 2020) Storozhenko, 2021

Storozhenko, Sergey Yu., 2021, On the exact position of the tribe Incolacridini in the modern classification of grasshoppers (Orthoptera: Acrididae), Zootaxa 4970 (1), pp. 106-118 : 115

Asymmetritania vietnamensis (Storozhenko, 2020) , comb. nov.

Figs. 14 , 25–33

Stolzia vietnamensis Storozhenko, 2020a: 16 , figs. 1–5 (holotype —female, Vietnam, Dong Nai Province, Cat Tien National Park; in ZIN St. Petersburg ).

Bettotania asymmetrica: Storozhenko, 1998: 37 (misidentification).

Non-type material examined. Southern Vietnam, Dong Nai province, Nam Cat Tien sector of the Cat Tien National Park (approximately 150 km north of Ho Chi Minh City), 8-15 December 1990, 1 male, leg. V. V. Badikov .

Description. Male (previously unknown). Similar to female ( Fig. 25 ) but smaller and brightly colored ( Figs. 26–28 ). Head and pronotum as in female but upper half of the lateral lobes of pronotum completely black. Antennae 19-segmented. Pronotum rugose; prozona 1.3 times as long as metazona. Tegmina touching each other in rest position, reaching knees of hind femora ( Fig. 26 ); median area widening apically, with numerous transverse veinlets forming intercalar vein in basal part of the area ( Fig. 27 ). Hind femora stout, 3.1 times as long as their maximal width, olive green with yellow pregenicular ring; hind tibia with 8 outer and 9 inner dorsal spines, blackish olive green with black base and greenish ring below. Tenth abdominal tergite continuous, with pointed furculae. Supraanal plate long, with a median basal impression, lateral margins with a pointed tooth in apical third, apex rounded. Cerci compressed, conical, with pointed apex, preapical tooth absent. Apical abdominal sternites with tufts of setae on both sides of the middle. Epiphallus strongly asymmetrical; left lophus large, in lateral view lingua-like; right lophus enlarged, broadly rounded; ancorae absent. Phallus rather long and narrow ( Fig. 32 ). Cingulum consisting of apodemes, zygoma, and rami. Apodemes completely sclerotized; ventral side of zygoma connected with arch of cingulum. Valves of cingulum completely covered by ectophallic sheath of penis. Basal valves of penis connected with apical ones by a short sclerotized flexure ( Fig. 33 ).

Measurements. Male (length in mm): body—14.8; antenna—9.5; pronotum—4.2; tegmen—9.5; hind femur— 8.5; hind tibia—7.0.

Distribution. Vietnam.

Remarks. The above described male from Vietnam was wrongly identified as Bettotania asymmetrica by me ( Storozhenko, 1998 ). This male was collected in the Cat Tien National Park—a type locality of previously known by a single female Stolzia vietnamensis . Therefore I believe reasonably that both Vietnamese specimens are conspecific. The male of Asymmetritania vietnamensis differs from A. asymmetrica in the shape of cerci and epiphallus, as well as in the flexure connected basal and apical valves of penis (in A. asymmetrica , the cerci with a small preapical tooth, the right lophus of epiphallus very small, and the flexure membranous).

Figures

FIGURES 1–14. Subfamily Incolacridinae. 1. Bettotania cincifemur, female body, lateral view (schematic after Miller, 1935); 2. Stolzia rubromaculata, male head and pronotum, lateral view (schematic after C. Willemse, 1930); 3. Stolzia javana, female head, frontal view; 4–7. Incolacris rubritarsi, female: 4. Head and pronotum, lateral view; 5. Head, frontal view; 6. Apex of abdomen, lateral view (after Hollis, 1975); 7. The same, ventral view (after Hollis, 1975); 8–12. Incolacris jianfengensis comb. nov., male (after Zheng & Ma, 1989): 8. Head and pronotum, lateral view; 9. The same, dorsal view; 10. Apex of abdomen, dorsal view; 11. The same, lateral view; 12. Hind knee, lateral view; 13. Asymmetritania asymmetrica comb. nov., male apex of abdomen, dorsal view (after Ingrisch, 1989); 14. Asymmetritania vietnamensis comb. nov., male hind knee, lateral view.

FIGURES 25–33. Asymmetritania vietnamensis comb. nov. 25. Female body, lateral view; 26. Male body, lateral view; 27. The same, frontal view; 28. The same, dorsal view; 29.Apex of female abdomen, lateral view; 30. Apex of male abdomen, dorsal view; 31. Female head and sternal plate, ventral view; 32. Male genitalia, dorsal view; 33. The same, lateral view.