Steirodon (Posidippus) minor Gorochov, 2025

Steirodon (Posidippus) minor Gorochov View in CoL sp. nov.

( Figs 30–33 View Figs 24–37 , 54–61 View Figs 38–57 View Figs 58–73 )

Material. Holotype – male, FRENCH GUIANA: “ 22 km NW of Regina, pk 79 Route Nle 2”, 4 º 25' N, 52 º 19' W, 100 m, 28 June 1995, V. Gusarov ( ZIN) GoogleMaps . Paratype – male, same data as for holotype ( ZIN) GoogleMaps .

Description. Male (holotype). General appearance very similar to S. (P.) dentiferum (including presence of small but distinct median denticle on anterior edge of pronotal disc; Fig. 59 View Figs 58–73 ) but with following characteristic features: body size slightly smaller (see measurements below); coloration greenish with whitish-greyish tinge on head and pronotum ( Figs 58–60 View Figs 58–73 ), brown eyes, light greyish brown most part of denticles on dorsolateral pronotal keels and dorsal surface of hind tibia as well as small marks on dorsoproximal parts of fore and middle tibiae (tarsi also almost light brown, but possibly they slightly rotten), and transparent membranes of hind wings having also greenish apical part and yellowish to whitish rest of venation; pronotum with slightly narrower disc (dorsolateral keels of this disc with 10–12 rather small and rounded denticles; Figs 59, 60 View Figs 58–73 ) as well as with clearly less high lateral lobes having somewhat wider (longer) lower parts ( Fig. 60 View Figs 58–73 ); wings more or less similar to those of S. ( Peucestes ) para sp. nov., but tegmina slightly wider (about 3.2 times as long as wide), with more straight middle parts of costal and anal edges, with distal tegminal portions approximately as in Fig. 21 View Figs 16–23 , and with stridulatory apparatus having rath- er deep (roundly rectangular) notch in anal edge of right tegmen near plectrum (behind it) and less deep (but distinct) notch in same place of left tegmen (i.e., shortly behind thick stridulatory vein which almost 4.7 mm in length and with 86 ventral teeth; Figs 30– 32 View Figs 24–37 ); legs and abdomen almost indistinguishable from those of S. (P.) dentiferum and S. (P.) major nom. nov., but fore tibia without spinule on its outer dorsal edge near tympana ( Figs 54, 55 View Figs 38–57 ), and genital plate with rather deep and almost rounded posteromedian notch as well as with thin and elongated styli ( Figs 87, 88 View Figs 83–105 ).

Variations. Paratype with lateral lobes of pronotum insignificantly narrower (shorter) but clearly less high than in S. (P.) dentiferum and ventrally wid- er (longer) than in S. (P.) major nom. nov. (compare Figs 61 and 63, 64, 67 View Figs 58–73 ), with 83 ventral teeth in stridulatory vein of left tegmen ( Fig. 33 View Figs 24–37 ), and with genital plate having somewhat more angular posteromedian notch and slightly shorter styli.

Female unknown.

Length in mm. Body 32–33; body with wings 72– 74; pronotum 9.5–10; tegmina 57.5–59; hind femora 29.5–30.5.

Comparison. The new species differs from the most similar S. (P.) dentiferum in the body slightly smaller, the pronotum clearly less high and with somewhat wider (longer) lower parts of the lateral lobes (compare Figs 60, 61 and 63, 64 View Figs 58–73 ), the stridulatory vein with a narrower ventral row of more numerous teeth (83–86 instead 54–62; see Figs 32, 33 and 35–37 View Figs 24–37 ), and the male genital plate with a somewhat deeper posteromedian notch. This new species may be only a subspecies of the rather widely distributed S. (P.) dentiferum , but the presence of a male of the latter species (having distinct differences in the above-mentioined characters from the new species) in Guyana (ZIN: “ British Guiana ”) indicates a possible sympatry of these taxa. From S. (P.) dohrni , the new species is distinguished by the male tegmina distinctly wider (in S. dohrni , these tegmina are approximately 3.9 times as long as wide, but in the new species, this ratio is about 3.2), and from all other species of this subgenus, by the presence of a distinct median denticle on the anteri- or pronotal edge and/or of a rather large notch on the male left tegmen anal edge near the stridulatory vein.