ISSN 0013-8738, Entomological Review, 2008, Vol. 88, No. 3, pp. 370–374. © Pleiades Publishing, Inc., 2008. Original Russian Text © B.A. Korotyaev, 2008, published in Entomologicheskoe Obozrenie, 2008, Vol. 87, No. 2, pp. 438–442. A New Species of the Weevil Genus Lepyrus Germar (Coleoptera, Curculionidae) from Magadan Province B. A. Korotyaev Zoological Institute, Russian Academy of Sciences, St. Petersburg, 199034 Russia Received October 11, 2007 Abstract—Lepyrus bermani sp. n. is described from Magadan Province. Data on the geographical distribution and hosts of the new species and its congeners in Northeast Asia are reported. DOI: 10.1134/S0013873808030093 The Holarctic genus Lepyrus Germ. includes about southern Siberia are associated with mountain ash, 25 Palaearctic species most of which are distributed in bird cherry, and alder. Below, a new species of the the eastern part of the region. A considerable number genus Lepyrus is described, probably endemic to Ma- of the species are characteristic of the taiga and tundra gadan Province. zones and of the mountain tundra of southern Siberia. Holotype and most paratypes of the new species are In the fauna of Northeast Asia, five species of Lepyrus in the ZIN collection, a pair of paratypes is donated to have been known: L. costulatus Fst., L. ventricosus each of the following collections: Natural History Fst., L. nordenskioldi Fst., L. gemellus Kby., and Museum, London; Canadian Museum of Nature and L. canadensis Csy. (Korotyaev, 1977). L. costulatus Canadian National Collection of Insects, Ottawa; and L. ventricosus are widely distributed in Eastern Strickland Museum, University of Alberta, Edmonton, Siberia and the Russian Far East; ranges of the three Canada; National Museum of Natural History, Wash- other species include also the North of the USA and ington, D. C.; and American Museum of Natural His- Canada. Of these three, the largest part of the range of tory, New York. Two paratypes from Bolshoi An- L. nordenskioldi is situated in Siberia, while its distri- nachag Mt. Range and one paratype from Malkachan bution in North America, as far as the examined mate- River Delta are in L. Behne’s collection, Müncheberg rial shows, is restricted mostly to the northern part of (Germany), and six paratypes from the last locality, in the Pacific coastal regions and the islands. L. gemellus Werner Starke’s collection, Warendorf, Germany. and L. сanadensis, on the contrary, are commonest and most widely distributed species of the fauna of north- Lepyrus bermani Korotyaev, sp. n. ern Canada and the USA and occur, in addition, in (Figs. 1, 2, 7, 8) very limited areas of the Arctic and Pacific coasts of Asia, with a few deeper inland enclaves along largest Description. Rostrum somewhat longer than prono- river valleys. The majority of Lepyrus species in tum, weakly or, occasionally in males, moderately Northeast Asia feed on the shrub and woody plants curved, at base slightly wider than fore femur, moder- of the willow family (Salicaceae), mostly willows; ately widening near apex. Apical part somewhat more L. costulatus occasionally is found in small numbers strongly bent ventrally; dorsal margin of rostrum in on chosenia [Chosenia arbutifolia (Pall.) A. Skvorts.] middle part of length, in females often in entire basal and poplar, and L. nordenskioldi often feeds on dwarf half, straight or slightly emarginate, usually weakly birches. L. ventricosus is the only species in Northeast raised before eyes. Dorsal surface of rostrum rather Asia associated with plants of the families other than evenly convex in cross-section, smoothly passing to Salicaceae: most frequently it occurs on shrub alder lateral surface, covered with moderately dense and [Alnaster fruticosus (Rupr.) Ledeb.] of the family coarse and usually not rugose punctation, moderately Betulaceae, and on bird cherry (family Rosaceae). shining. Median carina fine and low. Eyes oval, mod- A similar host range is known in Siberian chry- erately convex. Frons with rather deep fovea in centre. somelids of the genus Gonioctena Chevr., most of Antennae of male inserted at half-width, these of fe- which develop on willows but several species in male at 2/3 width of rostrum from apex. Scape moder- 370 A NEW SPECIES OF THE WEEVIL GENUS 371 Figs. 1–6. Lepyrus Germ.: (1, 2), L. bermani sp. n., male and female; (3, 4), L. nordenskioldi Fst., females, Okhotsk-Kolyma Plateau; (5), L. labradorensis Blair, Anderson River Delta, Canada; (6), Lepyrus sp., Magadan Prov., Debin Vill., Kolyma flood land. ately thickened at apex. Funicle thick; 1st and 2nd in middle of length. Punctation moderately coarse and segments of funicle equally long, 1.5 times as long as dense, usually rugose in centre of disc, with short gla- wide; 3rd–6th segments weakly transverse, 7th consid- brous rugae along sides. Sides with small smooth erably larger than rest, tightly joining the club. The granules more strongly convex in apical half of prono- latter short, ovate. tum. Postocular lobes obsolete. Pronotum weakly transverse, with straight or Elytra elongate, fused along suture, with weakly weakly rounded sides, weakly widening from base convex, rounded humeral prominences, widest in mid- toward apical third, occasionally widest at midlength. dle part, slightly compressed before middle, with very Apical constriction moderately deep. Disc weakly and shortly separately produced apices. Apical declivity evenly convex, with wide shining median carina. Sur- gentle, with faint depression before apex in lateral face of disc usually somewhat uneven, with shallow view. Base shallowly and evenly arcuately emarginate. oblique depressions diverging from base of median Striae rather fine, formed of small shallow punctures. carina, and with inconspicuous depressions near carina Intervals flat, usually about 3× as wide as striae, ENTOMOLOGICAL REVIEW Vol. 88 No. 3 2008 372 KOROTYAEV continentally in the Arctic North America. A good character distinguishing this species from L. bermani sp. n. is the swollen mesosternal process, protruding both above the metasternal process and anteriad in the area between mesocoxae. In addition, L. labradorensis differs from L. bermani sp. n. in the usually sharp median carina on pronotum, more contrasting white lateral stripe on pronotum composed from denser scales and widened at base, in the more slender legs, noticeably raised pubescence of short linear white scales on sides of the elytra, and longer hairs on the legs. In the proportions of the body and the vestiture, L. labradorensis resembles L. сanadensis, but the mesosternal process in the latter species is not swol- Figs. 7–10. Lepyrus Germ., aedeagus dorsally (7, 9) and laterally len, whereas this character is equally expressed in the (8, 10): (7, 8 ), L. bermani sp. n., (9, 10), L. nordenskioldi Fst., Okhotsk-Kolyma Plateau. specimen from Labrador in the American Museum of Natural History and in most specimens in the series weakly shining, moderately densely and irregularly from the Anderson River Delta in northern Canada: covered with fine, weakly convex granules. Sutural “Can. NWT, Loc. 07-77, Anderson R. Delta, Flat and 3rd intervals in basal 1/4 occasionally weakly Island, s. end, decumbent Salix / grasses; traps, convex, area between 3rd intervals flattened. VI.26–VII.15.1977, Anderson R. Expedition—1977, D. Shpeley, G. E. Ball collectors”, 15 ♀, and 6 ♀ from Legs rather long and slender, femora unarmed. Tib- other collections in the same area (Strickland Mu- iae straight, noticeably widening toward apex. Tarsi seum, University of Alberta). Males of L. labradoren- moderately long, 3rd segment in both sexes wide, sis are unknown although the species is rather com- rather strongly rounded at sides. mon in the collections of the museums of the USA. Aedeagus as in Figs. 7, 8. and Canada. This allows presuming parthenogenetic reproduction of L. labradorensis. In the northern Differential diagnosis. The new species is similar Palaearctic fauna of the subfamily Molytinae, the par- to L. nordenskioldi Fst. (Figs. 3, 4, 9, 10), with which thenogenesis is known only in the genus Lepyrus. it occasionally co-occurs or occupies neighboring A parthenogenetic form of a Lepyrus species (Fig. 6) habitats, but clearly differs in the structure of the is common on upper Kolyma in the Okhotsk-Kolyma shorter, more abruptly narrowed, and less attenuate Plateau, where series of several dozens of specimens apically aedeagus. L. bermani sp. n. may be recog- were collected by the author and E.G. Matis in 1974 nized also by the sparse, uniform scaling and always on willows in the Kolyma flood land downstream De- distinct granulation of the elytral intervals, and more bin Village. It is not clear from which bisexual species strongly convex in the basal half elytra, but the fe- the parthenogenetic form from Kolyma has descended; males are often difficult to differentiate from L. nor- it is most similar to L. nordenskioldi, widely distrib- denskioldi. On the Bolshoi Annachag Mt. Range, uted and most widely varying Asian species of Lepy- where L. bermani sp. n. is common, L. nordenskioldi rus. It is probable that L. labradorensis also has de- is represented by a small-sized form with smooth rived from the very widely distributed and variable pronotal disc and non-granulate elytra usually with L. сanadensis, but solving this problem requires rather contrasting, finely spotted scaling (Figs. 3, 4). karyological investigation of the relevant bisexual and This form usually may be easily distinguished from parthenogenetic forms of Lepyrus from Northeast Asia L. bermani sp. n., but intervals of elytra of larger and northern United States and Canada. specimens of L. nordenskioldi from riparian land- scapes and from maritime lowland may be also rather Material. Magadan Prov., Tenkinskii Distr., 20 km coarsely granulate, and these specimens can be relia- N of Vetrennyi Vill., Bol’shoi Annachag Mt. Range, bly differentiated from the new species only by the “Aborigen” Biological Station, ice-field bog: 4– aedeagus structure.