Megadiestramima (Neodiestramima) brevispina, Gorochov & Storozhenko, 2019

Megadiestramima (Neodiestramima) brevispina View in CoL sp. nov.

( Figs 57, 75–79)

Holotype. Male, Southern Vietnam, Dong Nai Prov., Vinh Cuu Distr. , Hieu Liem Area , Chien Khu D Forest Station , 11°15'53''N, 106°59'16''E, 85 m, forest, 28.XI.2010, L. Anisyutkin, A. Anichkin, A. Abramov, S. Kruskop ( ZIN). GoogleMaps

Paratypes. One male, same data as for holotype ( ZIN) GoogleMaps ; 1 male, same province and district, Vinh Cuu Nature Reserve (= Ma Da Forest ) in 6 km N of Ba Hao Vill., 11°18'34''N, 107°04'43''E, 80 m, forest, 21–27. XI.2010, L. Anisyutkin, A. Anichkin ( ZIN) GoogleMaps ; 1 male, 1 female, same nature reserve, but TW Cuc Forest Station , 11°22'51''N, 107°03'44''E, 75 m, forest, 21–29. XI.2010, L. Anisyutkin, A. Anichkin, A. Abramov, S. Kruskop ( ZIN) GoogleMaps ; 1 male, same province, Cat Tien [= Nam Cat Tien] National Park , forest, XII.2002, A. Abramov ( ZIN) ; 1 female, same data, but 15–20. XI.2010, L. Anisyutkin, A. Anichkin ( ZIN) ; 1 female, same country, Lam Dong Prov., environs of Long Lanh, Bi Doup – Nui Ba Natural Reserve , 12°10'N, 108°40'E, 1400–1900 m, 1–22.IV.2008, D. Fedorenko ( ZIN) GoogleMaps .

Description. Male (holotype). General appearance similar to that of M. (N.) orlovi . Colouration light brown with four pairs of brown spots on head (large area under eye reaching lateral part of clypeus, oblique stripe on gena under eye, spot behind eye, and slight stripe along dorsal edge of eye) and one brown median spot under rostral tubercles, a pair of small darkish marks located near each other along anterior edge of pronotum, a pair of similar marks but widely separated from each other along posterior edges of six anterior tergites (more posterior tergites almost uniform), brown apical parts of all femora, and reddish brown antennal flagellum. Lateral ocelli more or less intermediate in size between those of M. (N.) o. orlovi and M. (N.) o. lata ( Fig. 79); hind femur with ten inner ventral denticles and a pair of apical ones; armament formula of tibiae and hind basitarsus similar to that of previous species of Neodiestramima [d2a, v2, v~2, v3a / d2a (dia), v~2, v~2, v3a / d126e- 123i (d122e-125i), d2sa, 6a / d1c (d0c), dac]; inner dorsal spur of hind tibia slightly not reaching apex of dac; sixth abdominal tergite without posteromedian lobe; seventh abdominal tergite with short spine-like posteromedian process which looking as small angular projection (such process in M. orlovi almost twice as long as this process; for comparison see Figs 66, 69, 71 and 75); paraproct long (almost as in M. o. orlovi in length) but slightly narrower and with apical spinule direct- ed more backwards (paraproct approximately 3.5 times as long as posteromedian process of seventh abdominal tergite; Fig. 76); genitalia with somewhat longer lateral membranous lobes and slightly shorter dorsomedian lobe ( Fig. 57).

Variations. Colouration sometimes without distinct marks on tergites or with darkish spots on dorsal surface of hind femur. Armament of legs and size of lateral ocelli slightly variable: some specimens with these ocelli intermediate in size between those pictured in Figs 74 and 79.

Female. Colouration and structure of body as in males. However: one female with more numerous darkened marks along posterior edges of tergites, darker (almost greyish brown) spots on dorsal surface of hind femur and sparse darkish marks on light parts of legs; all females with abdominal apex almost as in M. (N.) orlovi , but apex of spine-like process of their seventh abdominal tergite narrowly rounded, angular or slightly notched, as well as genital plate with apical part clearly narrower and from barely notched (practically truncate; Figs 77, 78) to distinctly rounded [in female from Lam Dong Prov. (nearest to Dong Nai Prov.), this plate with somewhat wider apex (almost as in Fig. 70), but its lateral edges convex as in Fig. 78].

Comparison. This species differs from the nearest one in the posteromedian process of seventh abdominal tergite of male clearly shorter (see also the key above).

Etymology. The species name consists of the Latin words “brevis” (short) and “spina” (spine), because male of this species has the posteromedian process (spine) of seventh abdominal tergite short.