Fryerius (Dentitrella) proximus, Gorochov, 2023

Gorochov, A. V., 2023, Taxonomy of Podoscirtinae (Orthoptera: Gryllidae). Part 16: the genera Fryerius and Stenotrella from Madagascar, Russian Entomological Journal 32 (2), pp. 129-137 : 134

Fryerius (Dentitrella) proximus Gorochov, sp.n.

Figs 12–15 , 18 , 34–41 .

MATERIAL EXAMINED. Holotype — ♂, Madagascar, Toamasina Prov., Moramanga Distr., Analamazaotra Forest Station near Andasibe Vill. (18°56´S, 48°25´E), ~ 900 m, primary forest, at light, 8–20.III.2013, A. Gorochov ( ZIN).

DESCRIPTION. Male (holotype). Coloration and structure of body very similar to those of F. (D.) expolitus sp.n. but with following differences: dorsum of head with brown to light brown median area between medial yellowish longitudinal stripes (this area with less distinct yellowish transverse lines than in F. expolitus sp.n.; Fig. 12 ); pronotum with almost uniformly light greyish brown disc having a pair of short greyish brown stripes running along posterior edge, and with yellowish each lateral lobe having light greyish brown to greyish brown band along dorsal edge (this band in posterior part almost as wide as half of this lobe, and in more anterior portion, this band distinctly narrower; Fig. 12 ); metanotum with whitish tubercle-like convexity at middle ( Fig. 13 ); each tegmen with more distinct slightly darkened spots in majority of membranes of apical area and near distolateral part of mirror ( Fig. 18 ); legs with more uniform fore and middle tarsi and slightly lighter hind tarsus as well as clearly lighter hind femur and tibia (this femur with only two brown areas and brown median outer stripe, but most part of hind tibia light greyish brown with greyish brown dorsal surface and armament; Fig. 15 ); other body parts as in F. (D.) expolitus sp.n. in coloration, but darkened ventromedian band on abdomen distinctly lighter and somewhat longer (running from middle of abdomen to genital plate), rounded median area of anal plate greyish, and genital plate somewhat lighter (almost whitish with proximal half having brown ventromedian stripe and a pair of much narrower stripes along lateral edges, and with light brown most part of distal half; Fig. 14 ); apex of latter plate narrowly rounded (widely rounded in F. expolitus sp.n.; compare Figs 10 and 14 ); genitalia and spermatophore as in Figs 34–38 , distinguished from those of F. (D.) expolitus sp.n. by some fine but distinct details of structure: epiphallus with wider anterior part (see Figs 26 and 34 ); right epiphallic ectoparamere with somewhat wider subbasal part and narrower short bridge between this part and widened basal part (see Figs 31 and 39 ); left epiphallic ectoparamere with distinct and rounded ventral projection in subbasal part as well as with similar dorsal projection near it (in proximal half), but in F. expolitus sp.n., this ectoparamere without ventral projection in subbasal part and with distinct dorsal projection in distal half (see Figs 32 and 40 ); right rachial ectoparamere with clearly smaller (shorter) hook (see Figs 28 and 36 ); left rachial ectoparamere more curved, and apically somewhat wider in profile (see Figs 27, 29 and 35, 37 ); rachis with wider lateral sclerites (see Figs 33 and 41 ); spermatophore with ampulla almost as long as anchor together with tube (not distinctly shorter or longer; Fig. 38 ).

Female unknown.

Length in mm. Body 22.5; body with wings 31; pronotum 2.9; tegmina 22; hind femora 10.6.

COMPARISON. Differences of this species from F. (D.) expolitus sp.n. are listed above. From F. (D.) dilucidus sp.n., the new species differs in the same characters as F. (D.) expolitus sp.n.

ETYMOLOGY. This species name is the Latin word “proximus ” (nearest) due to a significant similarity of the new species to F. (D.) expolitus sp.n.

Figures

Figs 1–15. Fryerius, males: 1–6 — F. dilucidus sp.n.; 7–11 — F. expolitus sp.n.; 12–15 — F. proximus sp.n.; 1, 7, 12 — head with pronotum and parts of fore legs, anterior / dorsolateral view; 2–3, 8, 13 — metanotal gland (2–3) or its rudiment (8, 13), dorsal view; 4, 9 — anal plate with genital plate (4) or only with its base (9), posterodorsal view; 5, 10, 14 — genital plate, ventral view; 6 — hind leg without most part of femur, lateral view; 11, 15 — hind leg (15 — with distal part of middle leg), lateral view. Рис. 1–15. Fryerius, самцы: 1–6 — F. dilucidus sp.n.; 7–11 — F. expolitus sp.n.; 12–15 — F. proximus sp.n.; 1, 7, 12 — голова с переднеспинкой и частЯми передних ног, передний / верхнебоковой вид; 2–3, 8, 13 — метанотальнаЯ желеЗа и ее рудимент (8, 13), вид сверху; 4, 9 — анальнаЯ пластинка с генитальной пластинкой (4) или только с ее основанием (9), верхнеЗадний вид; 5, 10, 14 — генитальнаЯ пластинка, сниЗу; 6 — ЗаднЯЯ нога беЗ больШей части бедра, сбоку; 11, 15 — ЗаднЯЯ нога (15 — с дистальной частью средней ноги), сбоку.

Figs 16–18. Fryerius, right tegmen of male: 16 — F. dilucidus sp.n.; 17 — F. expolitus sp.n.; 18 — F. proximus sp.n. Рис. 16–18. Fryerius, правое надкрылье самца: 16 — F. dilucidus sp.n.; 17 — F. expolitus sp.n.; 18 — F. proximus sp.n.

Figs 19–41. Fryerius, male: 19–25 — F. dilucidus sp.n.; 26–33 — F. expolitus sp.n.; 34–41 — F. proximus sp.n.; 19–22, 26–29, 34– 37 — genitalia; 23–24 — posterior half of genitalia; 25, 30, 38 — spermatophore; 31, 39 — right epiphallic ectoparameres; 32, 40 — left epiphallic ectoparameres; 33, 41 — rachis without base; 19, 26, 34 — dorsal view; 20, 27, 33, 35, 41 — ventral view; 21, 28, 36 — left view; 22, 29, 37 — right view; 23 — ventral / slightly lateral view; 24 — ventral / slightly anterior view; 25, 30–32, 38–40 — lateral view.