Figs 1–3.
syn. Cylindroiulus (Sibiriulus) dentiger Gulička, 1963
Iulus (recte: Julus) profugus Stuxberg 1876: 33 –34 (holotype and lectotype not designated, number of specimens (syntypes) in the type series unclear, in the Swedish Museum of Natural History, Stockholm).
Iulus profugus — Stuxberg 1876 a: 316.
Julus profugus — Lokšina & Golovatch 1979: 387; Mikhaljova 1993: 34; Mikhaljova & Golovatch 2001: 116.
Cylindroiulus (Sibiriulus) dentiger Gulička 1963: 519 –521, 520: fig. 1: 1–3 (holotype male, from Prokopievsk, Kemerovo Area, Siberia, Russia, in Gulička’s collection).
Cylindroiulus (Sibiriulus) dentiger — Shelley et al. 2000: 52.
Sibiriulus dentiger — Lokšina & Golovatch 1979: 387; Mikhaljova 1993: 13 –15, 14: figs 7–14; Mikhaljova & Golovatch 2001: 106; Babenko et al. 2009: 182; Nefediev et al. 2013: 339.
non Sibiriulus dentiger — Nefediev 2001: 85.
Sibiriulus profugus — Mikhaljova 2002: 204 –206, 202: figs 6–7; 2004: 72 –75, 73: figs 114 –124, 74: map 9; Mikhaljova & Nefediev 2003: 84 –85; Mikhaljova et al. 2007: 59 –60, 62, 60: fig. 7; Nefediev 2002: 41; Nefediev & Nefedieva 2007: 161; 2007 a: 102–103; 2007 b: 139; 2011: 100–101; Babenko et al. 2009: 183 –184.
Material examined. 5 males, 3 females, 1 juvenile (ASU), Russia, Siberia, Tomsk Area, Tomsk District, near Zorkaltsevo, Pinus sibirica forest, 12 July– 24 August 2006, leg. S.A. Krivets; 1 male (IBSS), Russia, Siberia, Republic of Altai, Ongudai District, Seminkii Pass, Pinus sibirica forest, 1800 m a.s.l., 18 August 2007, leg. A.S. Babenko; 1 male, 3 females, 2 juveniles (ASU), Russia, Siberia, Altai Province, Kosikha District, ca. 5 air-km NW of Polkovnikovo, Betula forest, 4 May 2009, leg. P.S. Nefediev; 1 male (ASU), Russia, Siberia, Altai Province, Kosikha District, near Ozero-Krasilovo, Populus tremula forest with Betula, Padus avium, tallgrasses, 19 July 2009, leg. P.S. Nefediev; 2 males, 4 females, 2 juveniles (ASU), Russia, Siberia, Altai Province, Kosikha District, near Ozero-Krasilovo, Populus tremula forest with Betula, midgrasses, 20 July 2009, leg. P.S. Nefediev; 4 males, 10 females, 2 juveniles (ASU), Russia, Siberia, Altai Province, Kosikha District, near Ozero-Krasilovo, Betula forest with Populus tremula, Viburnum opulus, Padus avium, tallgrasses, 20 July 2009, leg. P.S. Nefediev; 3 males, 1 female (ASU), 1 male, 1 female (IBSS), Russia, Siberia, Altai Province, Kosikha District, near Ozero-Krasilovo, Salix with Betula on bank of Lake Krasilovo, 22 July 2009, leg. P.S. Nefediev.
Material re-examined (specimens published by Mikhaljova 1993, Mikhaljova & Golovatch 2001). 1 female (IBSS), Russia, Siberia, Novosibirsk Area, Toguchin District, near Mirnii, 28 July 1983, leg. V.D. Bakurov; 1 male (IBSS), Russia, Siberia, Kemerovo Area, Kuznetskii Alatau State Nature Reserve, environs of mouth of Bezymyanka River, 14 July 1994, leg. A.B. Ryvkin.
Type locality. Between Tomsk and Kansk (misspelt Kainsk), Siberia, Russia.
Diagnosis. This species differs from congeners mainly by the configuration of the gonopod mesomere apex with a protuberance and the presence of a massive, curved, dentiform inner process in the distal part of the gonopod opisthomere.
Distribution. Russia: Siberia (Novosibirsk Area, Kemerovo Area, Tomsk Area, the southern part of Krasnoyarsk Province, Republic of Khakassia, Altai Province, Republic of Altai).
Remarks. This species was originally described from between Tomsk and Kansk (misspelt Kainsk), Siberia, Russia in a Swedish edition and referred to as Iulus profugus (recte: Julus) (Stuxberg 1876), but then almost immediately redescribed in an English outlet and, again marked as a new species (Stuxberg 1876 a). In both these papers, the descriptions are identical.
The species has since remained among nomina dubia. Later, formal synonymy was proposed by Mikhaljova (2002): Julus profugus Stuxberg, 1876 is a senior subjective synonym of Cylindroiulus (Sibiriulus) dentiger Gulička, 1963, a form described from near Prokopievsk, Kemerovo Area, Siberia, Russia (Gulička 1963), elevated to genus rank (Lokšina & Golovatch 1979) and redescribed based on material from the Novosibirsk, Tomsk, Kemerovo areas and the Republic of Khakassia, Siberia, Russia (i.e. on near topotypes) (Mikhaljova 1993, 2002).
The finds in the Kosikha District and the Ongudai District are the first records of the species in the Altai Province and the Republic of Altai, respectively.
Study of above material revealed the presence of sole pads on the tibiae and postfemora of male legs as well as a group of short setae approximately in the middle of the stipites on the gnathochilarium and 4 setae arranged longitudinally on each lamella lingualis. Therefore these characters are added to the description of the species.
In addition, there are only drawings of the species vulvae (Mikhaljova 2002) (at one of these drawings tip of vulva covered with material, possibly left by the male to cork the bursal opening after copulation) but their morphological characters have never been described. Some of them are as follows: operculum with subtriangular apical incision; lateral longitudinal row of setae on operculum with 6 setae and mesal one with 4–5 setae; 13–17 setae on posterior median sclerite of the bursa; 12–13 setae on lateral and mesal sclerites of the bursa together.
Gonopods and vulvae of this species have never been shown in an SEM micrograph. Therefore they are given here (Figs 1–3).