Stenus (Nestus) latipennis J. Sahlberg 1880

Stenus (Nestus) latipennis J. Sahlberg, 1880

(Figs. 5A, 7 C–H)

Stenus latipennis J. Sahlberg, 1880: 78.

Stenus latipennis – Heyden 1881: 78. — Puthz 1972d: 107. — Puthz 1974: 112. — Shavrin & Puthz 2007: 123 (pars).

Stenus latipennis <?> – J. Sahlberg 1899: 340.

Stenus (Nestus) latipennis – Jakobson 1909: 481. — Palm 1961: 98. — Puthz 1965: 27 (pars). — Puthz 1967a: 49. — Tichomirova 1973: 173. — Shilov 1975: 58. — Ryvkin 1987: 159.

Stenus (Nestus) latipennis <?> – Poppius 1909b: 19.

Stenus (s. str.) latipennis – Campbell & Davies 1991: 111.

RUSSIA: 1 ♂, South of the Yamal Peninsula, Priuralskiy District, Tarcheda-Yakha River near mouth, 23 Jul. 1980, E.M. Veselova leg. (AR); 1 ♀, 70°04´N 87°36´E, SW Taimyr, upper reaches of Nizhnyaya Agapa River, Nyapan Ridge, at shore of Ladannakh Lake, 11–16 Jul. 2001, A.B. Babenko leg. (AR); 1 ♂, same locality and collector, snowfield, 5–9 Jul. 2001 (AR); 7 ♂♂, 7 ♀♀, Taymyr, Maymecha River mouth, Yantardakh Mt, 7 Jul. 1971, A.P. Rasnitsyn, A.G. Ponomarenko, I.D. Sukatcheva, V.V. Zherikhin leg. (AR, MTD); 1 ♂, 2 ♀♀, same locality and collectors, 3 Aug. 1971 (AR); 1 ♂, Taymyr, Khatangskiy District, Kotuy River, 6 km up-stream of Kresty, Salix sp., 11 Jul. 1976, A.P. Rasnitsyn & I.D. Sukatcheva leg. (AR); 1 ♂, Taymyr, Kotuy River 6 km up-stream of mouth, 18 Aug. 1971, A.P. Rasnitsyn, A.G. Ponomarenko, I.D. Sukatcheva, V.V. Zherikhin leg. (AR); 1 ♂, Taymyr, Khatangskiy District, Bol’shaya Romanikha River mouth, swampy old channel, 18 Jul. 1977, I.D. Sukatcheva leg. (AR); 1 ♀, Taymyr, near Khatanga Town, flood-plain Salix bushes with Larix, soil traps, 16–30 Aug. 1989, P.K. Yeryomin leg. (AR); 1 ♂, Putorana Highland, Ayan Lake near Ayan River source, mossy coastal osier-bed, 7 Jul. 1983, K.Yu. Eskov leg. (AR); 1 ♂, same locality and collector, in stony stream channel, 9 Jul. 1983 (AR); 1 ♂, Krasnoyarsk Territory, Turukhanskiy District, Bol’shaya Varlamovka River 2–6 km up-stream of mouth, 40 m a.s.l., river banks, 12 Jul. 1988, A.B. Ryvkin leg. (AR); 1 ♂, 6 ♀♀, Krasnoyarsk Territory, Turukhanskiy District, Mirnoye, traps, plate 11, 6–16 Jul. 1991, L.B. Rybalov leg. (AR, MHNG, ShIN); 1 ♀, same locality and collector, trap 10, 2–12 Aug. 1990 (AR); 1 ♂, 1 ♀, same locality and collector, plate 7, 9 traps, 8–18 Jun. 1989 (AR); 4 ♂♂, Evenkia, Central Siberian Biosphere Reserve, Stolbovaya River basin: lower reaches of Birapchana River near Kruten’kiy Stream, 110 m a.s.l., river bank: shingles (limestone), 23 Jun. 1993, V.B. Semenov leg. (AR); 1 ♂, East Siberia, Magadan Area, Ten’kinskiy Distr., ‘Aborigen’ field research station, 500 m, pebble river banks, 28 Jul.–5 Aug. 1990, L. Penev leg. (AR); 1 ♀, Magadan Area, 15 km SSE of Atka, 29 Jun. 1981, A.S. Ryabukhin leg. (AR); 1 ♂, Magadan Area, near Palatka, Khasyn, 27 Aug. 1978, V.V. Zherikhin leg. (AR).

The type series was collected by Nordenskjöld’s Yenisei expedition at five localities from Chyornyi Ostrov (‘Tschornaya ostrov’ in the original description, present-day Chernoostrovsk village) to Dudinka (‘Habitat ad ripas rivulorum torrentium inter lapillos in territorio frigido et arctico et parte boreali territorii silvosi rarius’). This species was reported for the first time for NE European Russia (‘Petschora’, without more precise locality) by J. Sahlberg (1899), based on the collection made by the botanist O. Kihlman; a decade later it was recorded from the Kanin Peninsula (‘zwei Exemplare unter Moos am Rande von Schneefeldern auf dem Bergrücken (Paë) bei Bugranitza am 4.VII. und ein drittes auf gleichartigen Stellen bei Madoha am 16.VII gefunden’, Poppius 1909b); Dr. Puthz has seen the two females from Kanin in ZMH, but has not seen the specimens from Pechora (pers. comm). Jakobson (1909), not being acquainted with the latter Kanin findings, summarized the range as ‘Arkhangelsk Government (Pechora); Yenisei Government’. Puthz (1965), based on earlier misidentifications by Hellén (Hansen et al. 1939; Renkonen 1941), believed the species to be represented in N Finland, notwithstanding the fact that Palm (1961) had revised all Fennoscandian records a few years earlier and noticed them to be erroneous (see S. (N.) labilis above and S. (N.) confusus below); nevertheless, Finland (without citing new material or references) was recently mentioned in the Distribution section for this species by Shavrin & Puthz (2007); just before the present manuscript was completed, Dr. Puthz informed me that two unpublished specimens (male and female) from ‘Lapponia inariensis’ had been identified by him as latipennis in 1974, but that the material should be revised again (e-mail of 2 Dec. 2010). The figure of the aedeagus of the male from Dudinka (Puthz 1965) is more or less adequate, except the missing longitudinal middle keel at the apical part of the median lobe. All further mentions of this species from the Palaearctic are confined to Siberia and Polar Ural: ‘Polarer Ural, Gouv.[ernment] Tobolsk’ (Puthz 1967a); ‘Im Museum Helsinki je ein Stück von Irkutsk und Ytyk-haja’ (Puthz 1972d; I believe the specimen from the former of these two localities may be related to S. delitor sp. nov.; the female specimen is repeatedly cited by Shavrin & Puthz 2007); records for Komi ASSR (Puthz 1974; Shilov 1975) do not go beyond the northernmost part of the territory (Sob’ River, Vorkuta, Yeletskiy, ‘Polyarnyi Ural’ railway station, etc). Tichomirova (1973) indicated the range as Siberian only. This species has also been reported for the Nearctic (Puthz 1974: ‘Belege aus dem North West Territory, dem Yukon Territory und Alaska im Museum Ottawa und in Waschington’; Campbell & Davies 1991: ‘AK, YK, NT’), but I do not know of any reliable American specimens and cannot state whether the range of S. latipennis is really subcircumpolar or whether the Nearctic findings concern a related species. In an earlier paper (Ryvkin 1987), I regarded S. latipennis warily as a N-Siberian species; after some closely related taxa have been described, it would probably be useful to revise all the material from other territories where the species has been recorded again.