Russian Entomol. J. 16(4): 361383 © RUSSIAN ENTOMOLOGICAL JOURNAL, 2007 Collembolan fauna of the Turukhansk Territory Ê ïîçíàíèþ ôàóíû êîëëåìáîë Òóðóõàíñêîãî êðàÿ Anatoly B. Babenko À.Á. Áàáåíêî Severtsov Institute of Ecology & Evolution RAS, Leninsky pr. 33, Moscow 119071, Russia. E-mail: [email protected] Èíñòèòóò ïðîáëåì ýêîëîãèè è ýâîëþöèè ÐÀÍ èì. À.Í. Ñåâåðöîâà, Ëåíèíñêèé ïð. 33, Ìîñêâà 119071, Ðîññèÿ. KEY WORDS: Collembola, Middle Siberia, northern taiga, fauna, new species. ÊËÞ×ÅÂÛÅ ÑËÎÂÀ: íîãîõâîñòêè, Ñðåäíÿÿ Ñèáèðü, ñåâåðíàÿ òàéãà, ôàóíà, íîâûå âèäû. ABSTRACT. The present paper is a result of Col- ning of the XX century after publications of results of lembola fauna survey performed in one of the northern the famous Swedish expedition of 18751876 [Tullberg, taiga regions of Middle Siberia (Yenisei basin, vicinity 1876; Reuter, 1891; Schött, 1893; Schäffer, 1900]. All of Turukhansk). During a season 130 species were re- modern data about the fauna of regions under consider- vealed for the area under study by different sampling ation is rather fragmentary and it was not accidental methods that may be considered as an evidence of a that only 58 widespread collembolan species were men- high species diversity of the group even in the northern tioned by Stebaeva [1976] for the plain Siberian taiga. belt of boreal Siberian forests. Nine new Collembola Recent ecological [Berezina, 1997; Mordkovich et al., species, viz. Philotella obesa Babenko sp.n., Micranu- 2003; Sleptsova, 2005] and taxonomic publications rida rostrata Babenko sp.n. (Neanuridae), Oligapho- [Rusek, 1984, 1991; Potapov, 1991, 2006; Potapov & rura sabulosa Babenko sp.n., Tantulonychiurus asiat- Stebaeva, 1991; Potapov et al., 2005; Berezina & Po- icus Babenko sp.n., Thalassaphorura tenuis Babenko tapov, 2006; Bretfeld, 2000, etc.] based on the material sp.n., Uralaphorura tunguzica Babenko sp.n., Deuter- from Siberian forests changed the situation but not aphorura mangazeya Babenko sp.n. (Onychiuridae), significantly as there is still no comprehensive species Folsomia potapovi Babenko sp.n. (Isotomidae), and list for any Siberian boreal region. To the contrary, Sminthurinus dispar Babenko sp.n. (Katiannidae) have Siberian edges including southern mountains and been described. steppes [Stebaeva, 1963, 1968, 1974, 1991, 2003, etc.], ÐÅÇÞÌÅ. Ðàáîòà ÿâëÿåòñÿ ðåçóëüòàòîì èññëåäî- northern tundras [Ananjeva, 1973; Ananjeva & Cher- âàíèÿ ôàóíû êîëëåìáîë îäíîãî èç ñåâåðî-òà¸æíûõ nov, 1979; Babenko, 2003; Babenko & Fjellberg, 2006, ðàéîíîâ Ñðåäíåé Ñèáèðè (áàññåéí Åíèñåÿ, îêðåñò- etc.], and North-Eastern Asia [Bondarenko, 1980; Ste- íîñòè ï. Òóðóõàíñê). Âñåãî çà ñåçîí íà äàííîé íå- baeva et al., 1984; Martynova et al., 1977; Tshelnokov, áîëüøîé òåððèòîðèè ðàçíûìè ìåòîäàìè ó÷¸òà 1988, etc.] are obviously investigated faunistically more âûÿâëåíî 130 âèäîâ íîãîõâîñòîê. Ýòî ñâèäåòåëüñòâó- completely. åò î ñîõðàíåíèè âûñîêîãî âèäîâîãî ðàçíîîáðàçèÿ The present paper is a result of collection performed ãðóïïû äàæå â ñåâåðíîé ïîëîñå ñèáèðñêèõ òà¸æíûõ in JulyAugust, 2003 in the northern taiga of the Ye- ëåñîâ. Îïèñàíî äåâÿòü íîâûõ âèäîâ êîëëåìáîë: Philo- nisei basin: vicinity of Turukhansk [65º48N 87º57E], tella obesa Babenko sp.n., Micranurida rostrata Baben- north of the Krasnoyarsk Territory (Fig. 1).The purpose ko sp.n. (Neanuridae), Oligaphorura sabulosa Babenko of the study was pure faunistic revealing as many sp.n., Tantulonychiurus asiaticus Babenko sp.n., Tha- species of the local fauna of Collembola as possible for lassaphorura tenuis Babenko sp.n., Uralaphorura tun- a season. That is why the sampling was performed in a guzica Babenko sp.n., Deuteraphorura mangazeya Ba- wide range of habitats covering all main landscape benko sp.n. (Onychiuridae), Folsomia potapovi Babenko types of the region under study, and several different sp.n. (Isotomidae) è Sminthurinus dispar Babenko sp.n. methods of sampling (funnels, pit-traps, entomological (Katiannidae). sweeping, and hand collection) were used in each site. The uncovered collembolan fauna turns out to be Introduction rather diverse for such northern region. As a whole, 130 species were found (Table) and more than 10% of It may sound strange but despite more than a centu- species list consists of species new for science. Some of ry-old study of Siberian fauna of Collembola, the level them were already described by Potapov [2006] and of faunistic knowledge of the main forested part of the Smolis [2007], the descriptions of new Protaphorura region is not significantly higher than that of the begin- Absolon, 1901 species will be published by I. Kaprus Printed in 2008. (Ukraine), respectively. Nine new species from differ- 362 Anatoly Babenko Fig. 1. An area under study. Ðèñ. 1. Ðàéîí èññëåäîâàíèé. ent families (Neanuridae, Onychiuridae, Isotomidae, and pso pseudocellum; Katiannidae) are described below. Their types are de- psx parapseudocellum; posited at the Chair of Zoology and Ecology of the s tergal or antennal sensillum; Moscow State Pedagogical University (MSPU). Th.13 tergal segments; ABREVIATIONS: Ti.13 tibiotarsi; a, m, and p-rows anterior, median, and posterior Tr trochanter; rows of setae on terga; v, vl ventro-axial and ventro-lateral setae of thorax Abd.16 abdominal segments; [Potapov, 2006]; AC, T-setae, setae M and Y abbreviation of tibiotar- VT ventral tube. sal setae according to Deharveng [1983]; AD anal spines; Philotella obesa Babenko sp.n. ae guards appendices of appropriates labial papil- Figs 212. lae; MATERIAL. Holotype, # Russia, Krasnoyarsk Territory, AE papillae labial papillae according to Fjellberg mouth of Nizhnyaya Tunguska River, vicinity of Turukhansk, [1998/99]; herbaceous meadow near forest edge, 02 viii 2003, A. Babenko AF sensilla enlarged sensilla on Ant.4 [Fjellberg, leg. Paratypes, 3$, # same data as holotype; # same data, meadow on steep slope of river valley; $, same data, damp sedge 1985]; meadow in a dell; 9$, # same region, clearing in mixed forest, Ant.14 antennal subsegments; 27 vii 2003; 3$, # same region, birch forest with rich AO antennal organ on Ant.3; herbaceous cover, 08 viii 2003; # same region, aspen forest bms basal microsensillum on Ant.13 in Isotomidae; with fragmentary lichen-moss cover, 27 vii 2003, A. Babenko leg. Cx coxa; DESCRIPTION. Colour bluish-grey, rather dark, ventral side only slightly paler. A small, stout species looks like d unpaired axial seta on area frontalis of a head; 0 immature specimens of Anurida gr. weberi, size 0.700.82 Lg.13 legs; mm, holotype 0.72 mm. Antennae conical, shorter than head. ms tergal microsensillum; Ant.12 with 7 and 13 setae respectively. Ant.34 fused MVO male ventral organ; dorsally, ventral separation marked by a fine tegumentary PAO postantennal organ; granulation. Ant.4 with slightly 3-lobed apical bulb and 6 Collembolan fauna of the Turukhansk Territory 363 6 2 5 7 3 11 89 10 4 12 Figs 212. Philotella obesa Babenko sp.n.: 2 dorsal chaetotaxy of head; 3 dorsal chaetotaxy of Th.23; 4 dorsal chaetotaxy of abdomen; 5 sensilla on Ant.34; 6 PAO and ocelli; 7 buccal cone; 89 top of mandibles; 10 maxillary head; 11 Ti.2; 12 ventral chaetotaxy of Abd.26. Scales: 24, 12 0.1 mm, 57 0.05 mm, 811 0.01 mm. Ðèñ. 212. Philotella obesa Babenko sp.n.: 2 äîðñàëüíàÿ õåòîòàêñèÿ ãîëîâû; 3 äîðñàëüíàÿ õåòîòàêñèÿ 23-ãî ñåãìåíòà ãðóäè; 4 äîðñàëüíàÿ õåòîòàêñèÿ áðþøêà; 5 ñåíñèëëû íà 34-ì ÷ëåíèêàõ óñèêîâ; 6 ÏÀÎ è ãëàçêè; 7 ðîòîâîé êîíóñ; 89 âåðøèíà ìàíäèáóë; 10 ãîëîâêà ìàêñèëëû; 11 òèáèîòàðçóñ 2-é ïàðû íîã; 12 õåòîòàêñèÿ 26-ãî ñòåðíèòà áðþøêà. Ìàñøòàá: 24, 12 0,1 ìì; 57 0,05 ìì; 811 0,01 ìì. 364 Anatoly Babenko blunt sensilla (Fig. 5), external microsensillum and organite ETYMOLOGY. Named due to general impression of the present. Ant.3 organ normal, consisting of two long, widely new species, from Latin obesus fat, stout, etc. separated outer sensilla, two bent sensory pegs and a small DISTRIBUTION. Known from several biotopes near the ventral microsensillum. Ocelli 5+5, about as large as tegu- type locality but may be widespread if Alaskan specimens mentary granules and hard to detect (Fig. 6). PAO roundish from Delta are conspecific (see above). It is more typical for with 1015 vesicles, as large as 22.5 of the nearest ocellar open, meadow sites (both dry and damp) of the region under diameter. Mandibles thin, usually with one small tooth be- study, found also in some forests without continuous moss tween apical and two basal ones (Figs 89), rarely two small cover. teeth were observed. Maxillary capitulum styliform, blunt- tipped with at least one bidentate dorsal lamella (Fig. 10). Micranurida rostrata Babenko sp.n. Labrum with 4/2352 setae, those of proximal row are Figs 1325. clearly longer (Fig. 7). Apical part of labium with 3 setae and MATERIAL. Holotype, # Russia, Krasnoyarsk Territory, two relatively large sensorial papillae, basal part of labium mouth of Nizhnyaya Tunguska River, vicinity of Turukhansk, with 8 setae as usual. clearing in a mixed forest, 27 vii 2003, A. Babenko leg. Paratypes, Integument granulation coarse and uniform. Dorsal setae 1$, 2# same data as holotype; 32 specimens, same data, damp smooth, very short and fine, sensilla well differentiated. sedge meadow in a dell, 02 viii 2003, A. Babenko leg. DESCRIPTION. Colour white. Size 0.350.45 mm, ho- Head chaetotaxy, particularly on the medial part of area lotype 0.44 mm. Antennae conical, slightly shorter than occipitalis, partly reduced (Fig. 2), d usually present. Char- 0 head. Ant.12 with 7 and 11 setae respectively. Ant.34 fused acteristics of dorsal chaetotaxy of thorax and abdomen (Figs dorsally, ventral separation marked by a fine tegumentary 34): Th.1 with 3+3 setae. Th.23 with only three setae in a- row, m-row reduced to lateral sensilla, p-row complete (p granulation. Ant.4 with a simple apical bulb, 6 well differen- 1 tiated sensilla, i-seta absent, external microsensillum and p ), setae p in posterior position, sensilla p set anteriorly to 5 2 3 organite present.