Gymnogryllus vietnamensis mada Gorochov, 2022

Gymnogryllus vietnamensis mada Gorochov subsp. nov.

( Figs 8–10 View Figs 8–17 , 19 View Figs 18–33 )

Etymology. This subspecies is named after Ma Da Forest (now Vinh Cuu Nature Reserve), its type locality.

Type material. Holotype – male, VIETNAM: Dong Nai Prov., Vinh Cuu Distr., Vinh Cuu Nature Reserve (= Ma Da Forest ), TW Cuc Forest Station , 11 º 22´51˝N, 107 º 03´44˝E, ~ 75 m, 21–29 November 2010, L. Anisyutkin, A. Anichkin, A. Abramov, S. Kruskop GoogleMaps . Paratype – male, same locality as for holotype, but 18–27 June 2011, L. Anisyutkin, A.Ani chkin GoogleMaps .

Description. Male (holotype). General appearance very similar to that of all other subspecies of this species: epicranium and pronotum almost dark brown with slightly lighter (brown) but poorly distinct longitudinal lines on posterior half of epicranial dorsum, with almost blackish eyes, with light brown ocelli as well as round spot under median ocellus and triangular spot under previous spot, with almost yellowish areas in lower halves of genae and small lateral spot near each lateral ocellus, and with light brown to yellowish lower half of each lateral pronotal lobe; antennae greyish brown with almost light brown few proximal segments (including scapes); mouthparts mainly light brown (including palpi) with brown mandibles; legs also light brown, but hind femur with reddish tinge on outer surface and small dark marks in apical part; venter of body (including genital plate) and lower parts of abdominal tergites as well as cerci and anal plate light brown, but genital plate with brown to greyish brown distal part, and anal plate with darkened lateral parts (paraprocts also more or less darkened); tegmina with greyish brown but semitransparent dorsal field and with yellowish and almost transparent lateral tegminal field having brown branches of Sc and stripe along dorsal edge of this field (areas between Sc and M); tegmina reaching apex of anal plate, with mirror in stridulatory apparatus slightly and barely more obliquely transverse than in G. v. vietnamensis Gorochov, 1992 and G. v. longidens Gorochov, 2011 , respectively (compare Figs 8, 11, 14 View Figs 8–17 ); hind wings insignificantly protruding beyond tegminal apices (exposed parts of hind wings approximately 1.5 mm in length). Genitalia distinguished from all other subspecies of this species by following characters: apical part of epiphallus with a pair of ventral teeth very long and located very near each other (almost as in G. v. longidens ; compare Figs 28, 29 and 30 View Figs 18–33 ); ectoparamere with distal (denticulate) portion clearly narrower than in nominotypical subspecies (see Figs 9 and 15, 16 View Figs 8–17 ) and distinctly longer than in G. v. longidens (see Figs 9, 10 and 12, 13 View Figs 8–17 ) as well as with more distinct angular projection (pp) at base of posterodorsal sclerite (see Figs 9, 10, 12, 13, 15–17 View Figs 8–17 , 19 View Figs 18–33 ).

Variation. Coloration of second male slightly darker: dorsum of epicranium very dark brown and without lighter lines; pronotal disc also very dark brown but with a pair of distinct reddish brown marks; apical parts of all femora, dorsal part of hind femur and base of hind tibia brown; apical area of dorsal tergimal field dark greyish brown.

Female unknown.

Length (mm). Body 25–28; body with wings 27– 30; pronotum 5.7–6.8; tegmen 19–21; hind femur 17.0–18.5; hind tibia 9.5–10.5; hind basitarsus 4.5– 4.8.

Comparison. The new subspecies is clearly distinguished from two other subspecies of G. vietnamensis by the characters of the male genitalia listed above (in the description), and from some most similar species, by the notch between the apical epiphallic teeth narrower and/or less deep (in caudal view; compare Figs 28 and 31–33 View Figs 18–33 ).