Typhloiulus bureschi Verhoeff, 1926

Figs 1–3

Typhloiulus bureschi Verhoeff, 1926

Typhloiulus (Bulgaroiulus) bureschi: Schubart 1934 Typhloiulus (Typhloiulus) bureschi: Strasser 1962

Material. Bulgaria: 3 ♂, 3 ♀, 1 subad. ♂, Vrachanski Balkan Nature park, v. Pavolche, Vratsa Distr., cave Pukoya, 750 m a.s.l., N43°9'45.40" E23°35'19.79", clay, 3.VII.2010, S. Goranov leg.; 3 ♂, 4 ♀, 1 juv., Vrachanski Balkan Nature park, v. Botunya, Vratsa Distr., cave Toshova dupka, 280 m a.s.l., N43°15'53.6" E23°20'47.5", clay, guano, 24. II.2007, B. Petrov leg.; 1 ♀, Vrachanski Balkan Nature park, Lakatnik Railway Station, Svoge Distr., cave Svinskata dupka, N43°5'18.17" E23°22'18.62", under stones in clay, B. Petrov, T. Georgieva, N. Toshkova, V.

Karadakov leg.; 1 ♂, 6 ♀, 1 juv., Vrachanski Balkan Nature Park, v. Gorna Bela rechka, Vratsa Distr., abandoned mine gallery, 13.III.1994, I. Pandourski leg. (all in NMNHS).

Descriptive notes. Labrum with a row of 14 setae. Promentum 0.4–0.5 times as long as lingual plates. Ozopores placed closely (about 1.5–2 × their diameter) behind pro-metazonal suture. Subanal scale blunt, triangular. Male legs in anterior part of body with an adhesive pad in distal part of tibia and with a shallow pit on postfemur. Gonopods (Figs 1–2) in situ entirely concealed inside gonopodal sinus. Promere (Fig. 1) subapically with rows of rounded protuberances; internal lobe (il) small, rotund, external lobe (el) robust, broadly rounded. Mesomere (M in Fig. 2) with a rounded, bulging apex, posterior surface deeply concave in the middle. Opisthomere (Figs 2 & 3) with a S-shaped posterior margin; intermediate lamella (l) weakly protruding beyond gonopodal contour, not separated from opisthomere; velum (v) lamellar, broad, wavy; solenomere (s) short, subcylindrical, with a hollow apex, filled with a group of setiform filaments (sf).

Distribution. This species is rather common in the caves of Western Stara planina Mts. (Vrachansky Balkan and Ponor), reaching as far east as the caves around Karlukovo in Predbalkan. It has been recorded from more than 30 caves and abandoned mine galleries in this region (Vagalinski & Stoev 2007).