Allotyphlus (Moreotyphlus) stolensis Hlaváč, Janák & Baňař, 2025

Allotyphlus (Moreotyphlus) stolensis Hlaváč, Janák & Baňař , sp. nov.

Figs 1–18 View FIGURES 1–8 View FIGURES 9–17 View FIGURES 18–24 , 83–84 View FIGURES 83–84

Material studied. Holotype, ♂: SERBIA with one label “SERBIA or. 26.v.2024 / Mt. Stol , soil washing, 660m / 44.16446N, 22.11492E / J. Janák lgt., hornbeam forest” [white, printed] ( JJRC) GoogleMaps . Paratypes: same data as holotype, 4 ♂♂, 4 ♀♀: (3 ♂♂, 3 ♀♀ in JJRC, 1 ♂, 1 ♀ in MMBC) GoogleMaps .

Diagnosis. Maxillary palpi ( Fig. 5 View FIGURES 1–8 ) with palpomere 2 dilated, about twice as wide as 3; palpomere 4 small, about three times shorter and narrower than 3; gular sutures confluent anteriorly at about midlength of head capsule, after meeting point again separated to two divergent sutures ( Fig. 6 View FIGURES 1–8 ); antennae with long scape about as long as terminal antennomere, about 1.6 times as long as wide; pedicel about as long as wide; antennomeres 3–10 transverse; terminal antennomere subtriangular, pointed to apex, slightly longer than wide ( Fig.7 View FIGURES 1–8 ); visible tergites 1–5 and visible sternite 2–4 with shallow basal impression ( Fig. 3 View FIGURES 1–8 ); visible sternite 5 (VII) with deep transversal sulcus ( Fig. 3 View FIGURES 1–8 , arrow), visible sternite 6 (VIII) of male symmetric, with median posterior excision which is prolonged with wide, deep impression ( Figs 11–12 View FIGURES 9–17 ); tarsal formula 3-3-3 ( Figs 15–16 View FIGURES 9–17 ); aedeagus with median lobe prolonged by long slender ventral lamina; parameres short, ventrally left paramere longer than right one, with 3 distal setae ( Fig. 17 View FIGURES 9–17 ).

Description. Body ( Figs 1, 2 View FIGURES 1–8 ) about 1.4 mm long (with abdomen slightly extended posteriad), completely depigmented.

Head capsule ( Fig. 4 View FIGURES 1–8 ) slightly longer than wide; wider than pronotum, posterior part deeply inserted into pronotum; basal capsule separated from neck region by occipital constriction, part of head capsule and neck region retracted into pronotum; gular sutures ( Fig. 6 View FIGURES 1–8 ) confluent anteriorly at about midlength of head capsule, after meeting point again separated to two divergent arms; maxillary palpi ( Fig. 5 View FIGURES 1–8 ) with palpomere 2 dilated, about twice as wide as 3; palpomere 4 small, about three times shorter and narrower than 3.

Antennae ( Fig. 7 View FIGURES 1–8 ) long, scape about as long as terminal antennomere, about 1.6 times as long as wide; pedicel as long as wide, as wide as scape, twice as long as antennomere 3; antennomeres 3–10 transverse; 3, 4 and 6 subequal in length; antennomere 5 larger than 4 and 6; 5 and 7 subequal in length; 8 as long as 7; 8 and 9 twice as wide as long; 9 1.25 times as long as 8; 10 1.2 times as long as 9; terminal antennomere subtriangular, pointed to apex, slightly longer than wide.

Pronotum ( Fig. 8 View FIGURES 1–8 ) about 1.1 times as long as wide, widest in anterior quarter, after that convergent posteriad; anterior angles widely rounded; posterior angles sharper; about 1.2 times as long as elytra. Prosternum ( Fig. 9 View FIGURES 9–17 ) fused with proepisternum, procoxal cavities rounded on anterior margin.

Elytra ( Fig. 8 View FIGURES 1–8 ) about as long as wide.

Abdomen ( Figs 1–2 View FIGURES 1–8 ) long, considerably longer than length of head capsule, pronotum and elytra combined. Visible tergites 1–5 (IV–VIII) and visible sternites 2–4 (IV–VI) with shallow basal impression, visible sternite 5 (VII) with deep transverse sulcus ( Fig. 3 View FIGURES 1–8 , arrow). Visible tergite 6 (IX) of male expanded in posterior half and with rounded apical margin ( Fig. 10 View FIGURES 9–17 ). Visible sternite 6 (VIII) of male ( Figs 11, 12 View FIGURES 9–17 ) symmetric, setose in posterior half, about as long as wide, with median posterior excision which is prolonged with wide, deep impression, its surface shagreened and lateral sides bordered by line of short setae. Terminal abdominal segments of female ( Fig. 13 View FIGURES 9–17 ) with two paired longitudinal sclerites and half-circled shaped structure in middle. Male sternite IX asymmetric, with posterior margin rounded, lateral parts of tergite IX asymmetric, strongly chitinised, tergite X with short pointed projections laterally ( Fig. 14 View FIGURES 9–17 ).

Legs short, all tibia distally dilated, tarsal formula 3-3-3 ( Figs 15–16 View FIGURES 9–17 ).

Aedeagus ( Figs 17 View FIGURES 9–17 , 18) about 0.26 mm long, median lobe prolonged by long slender distal process, basal part about 1.4 times as long as distal process, apex of distal process variable, rounded and slightly curved at apex in lateral view, with sharp, short preapical tooth; sclerite of median lobe well-defined; parameres short, in ventral view left paramere longer than right one, with 3 distal setae ( Fig. 17d View FIGURES 9–17 ).

Etymology. Locotypic, named after Stol planina, the type locality of the species.

Natural History. All specimens were collected by the soil-washing in a belt of hornbeam forest with hazel, maple and oak on a north-facing slope above a stream, together with Banatotyphlus siclus . The volume of the sample had about 100 liters ( Figs 83–84 View FIGURES 83–84 ).

Remarks. Allotyphlus (Moreotyphlus) stolensis has similar aedeagus as A. candicus and A. foedatus (both from Greece, Crete) with long ventral lamina. It can be readily separated from late two species by the distal part of the ventral lamina slightly curved with rounded apex. The apex of the median lobe of A. candicus and A. foedatus is sharp, not curved and it is much shorter in the relation of the length of basal part of median lobe.

Distribution. Serbia.