Megadiestramima (Megadiestramima) centralis, Gorochov & Storozhenko, 2019

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

( Figs 34, 35, 49)

Holotype. Male , Central Vietnam, Thua Thien Hue Prov., 40 km SE of Hue Town, Bach Ma National Park, 1300 m, X.2003, N. Orlov ( ZIN).

Description. Male (holotype). General appearance similar to that of all previous congeners. Colouration light brown with almost dark brown large areas under eyes (reaching lateral parts of clypeus) and small areas on dorsomedial parts of rostral tubercles, brown areas behind eyes, most part of tergites, apical parts of femora, hind tibia, paraproct, epiproct and genital plate, as well as intermediate in colour (between brown and light brown) rest of head dorsum, ventrolateral areas on metanotum and on seven anterior abdominal tergites, more posterior tergites, cerci, fore and middle legs, hind tarsus and dorsal surface of hind femur. Rostral tubercles rather thick (their base laterally almost 1.5 time as wide as distance between each rostral tubercle and nearest eye); apical segment of maxillary palpus somewhat shorter than half of fore femur (this femur approximately 2.2 times as long as this segment); both fore coxae with very short spine; hind femur with 8–9 inner ventral non-articulated spinules; armament formula of tibiae and hind tarsus characteristic [dea, v2, v2, v3a / d2a, v~2 (ve), v2 (vi), v3a / d32e-30i (d33e-29i), d2sa, 6a / d1c, dac]; inner dorsal spur of right hind tibia distinctly protruding beyond apex of dac (in left leg, such spur much shorter, possibly restored); sixth abdominal tergite without distinct posteromedian lobe but with very small posteromedian notch; seventh abdominal tergite with very short posteromedian process (shorter than in all previous congeners; Figs 34, 35); paraproct with dorsal lobe not projected backwards, with ventroapical process moderately long, strong, straight and having more or less rounded (nort acute) apex, and with slight convexity between these lobe and process ( Fig. 35); genitalia with a pair of narrow sclerotized ribbons (rudiments or traces of partly reduced Y-shaped median sclerite; Fig. 49).

Female unknown.

Length in mm. Body 25; pronotum 9.2; fore femur 18; hind femur 36; hind tibia 39; hind basitarsus 7.3.

Comparison. The new species is most characteristic among Megadiestramima s. str., because its seventh abdominal tergite in male has a shortest posteromedian process, its male paraproct is with straight ventroapical process having the apex not acute, and its male genitalia are with rudiments or traces of Y-shaped median sclerite (see also the key above).

Etymology. This species name is the Latin word “centralis ” (central), because the new species was collected in the central part of Vietnam.

Megadiestramima (Leodiestramima) lecta Gorochov, 1998 View in CoL

( Figs 53, 54, 58–61)

Material examined. Central Thailand: 3 males (holotype and paratypes) , 1 female and 1 nymph (paratypes), Malay Peninsula, Phetchaburi Prov., 60–70 km SW of Phetchaburi City, environs of Kaeng Krachan National Park near border with Myanmar , ~ 800 m, primary forest, on rotten wood and on forest floor at night, 1–3.VIII.1996, A. Gorochov ( ZIN) .

Note. This species is sufficiently described ( Gorochov, 1998) and characterized by the following features: posteromedian process of seventh abdominal tergite in male is distinctly truncate and rather wide (distal width of this process is about 3.5 mm; Fig. 58); ventroapical process of each male paraproct is clearly S-shaped in profile ( Fig. 59); male genitalia are completely membranous and have rather short lobes ( Figs 53, 54); female genital plate is short and with the apex angularly tubercle-like ( Fig. 61); ovipositor is moderately long (hind femur is about 1.4 times as long as ovipositor).

Megadiestramima (Leodiestramima) exculta Gorochov, 1998 View in CoL

( Figs 51, 52, 62–65)

Material examined. Southern Thailand: 2 males (holotype and paratype) , 2 females and 5 nymphs (paratypes), Malay Peninsula, Surat Thani Prov., 40 km SW of Phanom Town, environs of Khao Sok National Park , primary forest, on bark of trees near soil and on leaves of low bushes as well as in small ground burrows near forest road at night, 20–29.VII.1996 (all collected as nymphs, imago VIII–IX.1996), A. Gorochov ( ZIN) .

Note. The species is also sufficiently described ( Gorochov, 1998). It is characterized by the posteromedian process of seventh abdominal tergite in male roundly truncate and moderately narrow (distal width of this process is about 1.8 mm; Fig. 62), ventroapical process of each male paraproct somewhat shorter than in M. (L.) lecta and barely S-shaped in profile ( Fig. 63), male genitalia similar to those of this species but with rather long lobes ( Figs 51, 52), female genital plate also similar to that of this species but with the apex almost spine-like ( Fig. 65), and ovipositor moderately short (hind femur is about 2.1–2.2 times as long as ovipositor).