Megadiestramima extensa Gorochov, 1998

Qin, Yanyan, Liu, Xianwei & Li, Kai, 2016, Review of the cave cricket genus Tamdaotettix Gorochov with a new species and some new descriptions (Orthoptera: Rhaphidophoridae, Aemodogryllinae), Zootaxa 4154 (3), pp. 339-345 : 344-345

Megadiestramima extensa Gorochov, 1998

( Figs. 8–10 )

Megadiestramima extensa Gorochov, 1998 . Entomologicheskoe Obozrenie, 77(1): 91–93, figs. 135–137.

Description. Male. Body intermediate sized. Head with fastigium of vertex divided into two conical tubercles, slightly separated. Legs long and slender, fore femora about 2.3 times as long as the pronotum, beneath unarmed, external genicular lobe with a long movable spur; fore tibiae beneath with 2 external and 2 internal spurs, between the paired apical spurs with a short spur. Mid femora with a long movable spur on the external and internal genicular lobe; mid tibiae beneath with 2 external and 2 internal spurs, between the paired apical spurs with a short spur. Hind femora with 7 inter spines and without outer spines on ventral margin; hind tibiae with 31 outer spines and 30 inter spines on dorsal margin, arranged sparsely, inner superapical spur of hind tibia almost equal in length to hind metatarsus. Hind metatarsus with 2 dorsal spines. Apex of process of 7th abdominal tergite almost sawtoothed ( Fig. 8 ). Apex of paraproct hooked ( Fig. 9 ).

Female. Subgenital plate narrowing from base to apex and apex with a deep median incision ( Fig. 10 ). Ovipositor greater than half the length of hind femora.

Coloration. Body yellowish brown. Genicular lobes of leg dark and with darkish stripes. Dorsal side of hind femora dark.

Measurements. (length in mm) Body Ƌ14.0, ♀ 17.5; pronotum Ƌ6.0, ♀ 6.0–8.0; fore femora Ƌ14.0, ♀ 13.0– 16.0; hind femora Ƌ27.5, ♀ 24.5–30.0; hind tibiae Ƌ30.0, ♀ 32.0; ovipositor 17.0.

Material examined. 1♂, Mt. Bavi, Tonkin, Vietnam, 1941.VII, alt. 800–1000m, collected by P. A. De . Cooman ; 2♀♀, Mt. Bavi, Tonkin, Vietnam, 1940.VIII, alt. 900–1000m, collected by P. A. De. Cooman .

Distribution. Vietnam (Province Hashonbinh, Tonkin)

Discussion. This species is very similar to Megadiestramima darevskyi Gorochov, 1998 , but differs from the latter in: apex of male paraproct hooked not strongly.

Figures

FIGURES 8 – 10. Megadiestramima extensa Gorochov, 1998. 8. Abdominal apex of male, dorsal view; 9. Abdominal apex of male, lateral view; 10. Subgenital plate of female; scale bars = 2 mm.