Megadiestramima (Megadiestramima) bilobata, Gorochov & Storozhenko, 2019

Megadiestramima (Megadiestramima) bilobata View in CoL sp.nov.

( Figs 25–28, 48)

Holotype. Male, Central Vietnam, Quang Binh Prov., 35 km NW of Dong Hoi, Phong Nha – Ke Bang National Park, ~ 600 m, IX–X.2003, N. Orlov ( ZIN).

Paratypes. Four males, 2 females, same data as for holotype ( ZIN) ; 1 male, same province and park, but 23 km W of Phong Nha Vill. , 17°38'16''N, 106°05'38''E, 300 m, 2007, A. Abramov ( ZIN) GoogleMaps .

Description. Male (holotype). General appearance similar to that of congeners previously considered here. Colouration and external structure of body as in M. (M.) borealis but with following differences: dorsum of head behind rostral tubercles dark brown; pterothoracic and abdominal tergites coloured as in M. (M.) abramovi ; legs coloured as in female of M. (M.) borealis described above (except for hind femur coloured as in male of M. borealis ); hind femora with 9–10 inner ventral denticles; armament formula of tibiae and of hind basitarsus slightly different [dea, v2, v2, v3a / d2a, v2, v2, v3a / d32e-27i (d28e-27i), d2sa, 6a / d1c, dac]; inner dorsal spur of hind tibia distinctly protruding beyond apex of dac; sixth abdominal tergite with moderately long posteromedian lobe reaching apex of posteromedian process of seventh abdominal tergite and having small apical notch ( Figs 25, 26); latter process with small posteromedial hooks located somewhat further from each other ( Fig. 25); paraproct with dorsal lobe clearly projected backwards, and with ventroapical process strong, long, acute and moderately curved upwards ( Fig. 26). Genitalia with Y-shaped median sclerite as in Fig. 48.

Variations. Colouration slightly variable: some males with slightly lighter dorsum of head and more spotted body, i.e. having small lightish marks among dark parts of thoracic tergites and larger spots among dark parts of abdominal tergites as well as brown to dark brown apical parts of femora and dorsal area on proximal half of hind femur. Armament of legs very weakly variable.

Female. Colouration and structure of body similar to those of males, but darkened parts of head dorsum and of tergites almost uniformly brown, legs coloured approximately as in holotype or with brown dorsal area on proximal half of hind femur, and abdominal tergites and paraprocts as in female of M. (M.) abramovi (however, sixth abdominal tergite with posteromedian lobe slightly more distinct and lacking apical notch, and posteromedian lobe of seventh abdominal tergite with small apical notch). Genital plate with almost truncate (slightly concave) posterior part and with lateral non-articulated spinules developed but located in more distal position than in all previous congeners ( Figs 27, 28).

Length in mm. Body: male 22–25, female 24–25; pronotum: male 7.8–8.9, female 8.3–8.5; fore femur: male 14–16.5, female 14.5–16.5; hind femur: male 27–32, female 28–31; hind tibia: male 29–36, female 33–36; hind basitarsus: male 5.5– 6.5, female 6.3–7; ovipositor 17–19.

Comparison. The new species differs from all the other known species of this subgenus in the sixth abdominal tergite in male having a rather long posteromedian lobe (see also the key above).

Megadiestramima (Megadiestramima) vera Gorochov, 2002 View in CoL

( Figs 29–33, 42–44)

Material examined. Central Vietnam: 7 males (holotype and paratypes) , 4 females (paratypes), Gia Lai Prov., Ka Bang Distr. , Krong Pa Vill., primary forest, at night, IX.1997, N. Orlov ( ZIN) ; 1 male, Kon Tum Prov., Kon Plong Distr. , Mang Canh Vill., 1100– 1350 m, 11.XII.2018, N. Orlov, L. Ioganssen ( ZIN) .

Note. The species is sufficiently described from the above-mentioned specimens ( Gorochov,2002). It is distinctly differs from all the previous congeners in the ventroapical process of male paraproct long, thin and moderately curved upwards ( Fig. 30), and in the female genital plate long, narrow and with a deep posteromedian notch ( Fig. 32). Here this species is firstly recorded from a nearest province.