Russian Entomol. J. 28(4): 389–399 © RUSSIAN ENTOMOLOGICAL JOURNAL, 2019 A key to species of the tribe Hylastini LeConte, 1876 (Coleoptera: Curculionidae: Scolytinae) from Russia and adjacent countries Îïðåäåëèòåëüíûå òàáëèöû âèäîâ òðèáû Hylastini LeConte, 1876 (Coleoptera: Curculionidae: Scolytinae) Ðîññèè è ñîïðåäåëüíûõ ñòðàí M.Yu. Mandelshtam1, A.V. Petrov2 Ì.Þ. Ìàíäåëüøòàì1, À.Â. Ïåòðîâ2 1 St. Petersburg State Forest Technical University named after S.M. Kirov, Institutskii per. 5, St. Petersburg 194021, Russia. E-mail: [email protected] 1 Санкт-Петербургский государственный лесотехнический университет им. С.М. Кирова, Институтский пер., д. 5, 194021 Санкт- Петербург, Россия. 2 Institute of Forest Science RAS, Sovetskaya st. 21, Uspenskoe, Moscow Region 143030, Russia. E-mail: [email protected] 2 Институт лесоведения Российской академии наук, с. Успенское, ул. Советская, д. 21, 143030 Московская обл., Россия. KEY WORDS: Coleoptera, Curculionidae, Scolytinae, Hylastini, Hylastes, Hylurgops, bark beetles, taxonomy, Russia, endemics, countries of the former USSR. КЛЮЧЕВЫЕ СЛОВА: Coleoptera, Curculionidae, Scolytinae, Hylastini, Hylastes, Hylurgops, короеды, систематика, Россия, эндемики, страны бывшего СССР. ABSTRACT. Species of the tribe Hylastini Erichson, The tribe Hylastini LeConte, 1876 includes four 1836 from Russia and adjacent countries are reviewed genera of Scolytinae: Hylastes Erichson, 1836, Hylur- and keys to genera and species of the tribe are provided. gops LeConte, 1876, Scierus LeConte, 1876 and Pach- Data on synonymy, geographic distribution and host- ysquamus Mercado-Vélez et Negrón, 2014 [Wood, plants of all Hylastini species of Russia and neighboring 1986; Wood, Bright, 1992; Mercado-Vélez, Negrón, states are given in an annotated list of species. Special 2014] of which two are recorded from Russia and attention is given to a poorly known subendemic species adjacent countries. The Palaearctic fauna of the tribe of Hylastini, Hylastes substriatus Strohmeyer, 1914 breed- Hylastini currently includes 27 species [Wood, Bright, ing on Schrenk spruce and limited in the distribution by 1992; Pffefer, 1995; Knížek, 2011]. Besides, 8 fossil the Tien-Shan mountains, i.e. by states of Middle Asia species were described from Baltic amber [Schedl, and neighboring provinces of China. New synonymy is 1947; Wood, Bright, 1992]. established: Hylurgops imitator (Reitter, 1900), syn.n. Species in the tribe are characterized by the follow- of Hylurgops interstitialis (Chapuis, 1875). ing features: 1) body cylindrical (Figs 1–4, 20); 2) vestiture of the upper side of the body usually includes РЕЗЮМЕ. Рассмотрен видовой состав короедов both hair-like setae and scales, often vestiture is rather трибы Hylastini Erichson, 1836 России и сопредель- poorly developed (Figs 5–6); 3) head elongate, subros- ных стран и приведены таблицы для определения trate, frons not sexually dimorphic (Figs 15–16); 4) eye родов и видов трибы. В аннотированный список oval, entire; 5) antennal funicle 7-segmented, scape видов собраны сведения о синонимии, географи- elongate, club conical; 6) prothoracic precoxal area ческом распространении и кормовых породах всех large, its lateral margins strongly elevated from anteri- видов трибы Hylastini России и соседних государств. or rim to coxae forming acutely elevated precoxal Специальное внимание уделено плохо изученному ridge; 7) pronotum narrowing anteriorly with more or единственному субэндемичному виду трибы Hyla- less strongly developed constriction in the anterior stini бывшего СССР, Hylastes substriatus Strohmeyer, third of its length, anterior margin simply rounded 1914, развивающемуся на ели Шренка и ограни- (Figs 17–19), not armed; 8) surface of pronotum punc- ченного в распространении горами Тянь-Шаня: tured, without crenulations, denticles or rugosities; 9) странами Средней Азии и граничными провинция- base of elytra with poorly developed crenulations, not ми Китая. Установлена новая синонимия: Hylurgops elevated; 10) elytral apex convex, simply rounded imitator (Reitter, 1900) = Hylurgops interstitialis without profound armature; 11) tarsal segment 3 wider (Chapuis, 1875), syn.n. than 1 or 2 (Figs 13–14). How to cite this article: Mandelshtam M.Yu., Petrov A.V. 2019. A key to species of the tribe Hylastini LeConte, 1876 (Coleoptera: Curculionidae: Scolytinae) from Russia and adjacent countries // Russian Entomol. J. Vol.28. No.4. P.389–399. doi: 10.15298/rusentj.28.4.08 390 M.Yu. Mandelshtam, A.V. Petrov Description of the proventriculus in Hylastes and ences (Vladivostok), Natural History Museum (Lon- Hylurgops is given by Nobuchi [1969] and Lopez- don), Naturhistorisches Museum Wien (Vienna), Natu- Buenfil et al. [2001] (Figs 7–8). The proventriculus in ral History Museum (Budapest), and the United States both genera is narrowing posteriorly; anterior plate National Museum of Natural History (Washington) were sclerotized on lateral sides, indistinctly bordered on also examined. crop, posteriorly with about 20–25 transverse ridges. In Data about distribution were taken principally from Hylurgops ridges are replaced by rows of minute tuber- Knížek [2011] and data about host plants from Pfeffer cles in anterior portion (except lateral sides), the tuber- [1995] and Krivolutskaya [1958, 1983, 1996], but many cles becoming sharper and longer in middle of anterior unlisted sources were used as well as the authors’ own portion [Nobuchi, 1969]. In Hylastes ridges are more or field observations. less curved and accompanied with spinulae in middle of Photographs of beetles were taken using a Canon anterior portion and replaced by rows of sharp tuber- 50D camera and macro lens MP-E 65mm, and pro- cles, becoming larger on each lateral side [Nobuchi, cessed using the program CombineZP. 1969]. Posterior plate as long as anterior; closing teeth long, extending beyond middle of masticatory brush. In Results Hylurgops crop rather closely covered by long spines, in Hylastes crop rather closely covered by pubescence [Nobuchi, 1969]. KEY TO THE RUSSIAN GENERA IN THE HYLASTINI: In male genitalia the median lobe is cylindrical, nar- 1. Third tarsal segment emarginate, narrow, 1.0–1.1x as rowing posteriorly; dorsal lobes overlapping, subequal to wide as the second segment (Fig. 13); pronotum without half length of median lobe with wedge-shaped hind mar- noticeable constriction in the anterior third of its length or gins; lateral lobes longer than dorsal ones, attaining 2/3 of this constriction is only poorly developed, sides of prono- tum usually parallel for most of its length, form of prono- median lobe length [Grocholski et al., 1977, Michalski et tum elongate-oval when viewed from above (Figs 17–18); al., 1983]. Apophyses as long as median lobe, apophyses pronotum more elongated, averaging 1.2x longer than at base either divided (Figs 21–22, 26) or fused forming wide; pronotal disc lacking or with fewer small than large V-like figure (Figs 23–25); spicule longer than aedeagus, punctures (Figs 9–11) ............ Hylastes Erichson, 1836 sickle-shaped, with flattened base adjoining the apices of — Third tarsal segment bilobed, broad, 1.3–1.7x as wide as the apophyses. the second segment (Fig. 14); pronotum with conspicuous External morphology is very variable within species constriction on anterior third, strongly narrowing anteri- of this tribe and have led to numerous taxonomic discus- orly, nearly triangular when viewed from above, broad sions about the validity of several species [Pfeffer, (Fig. 19), 0.9–1.1 times as long as wide; pronotal disc 1944; Hansen, 1956; Lekander, 1965; Schedl, 1968; usually with about equal number of smaller and larger punctures ............................. Hylurgops LeConte, 1876 Beaver, 1970; Grocholski et al, 1976, 1977]. All species breed in coniferous hosts [Wood, 1982, Genus Hylastes Erichson, 1836 1986], mostly in habitats with high humidity, often in In Russia and neighboring countries (in borders of the stumps, roots or logs contacting with ground. Some former USSR) 10 species are recorded. Out of these, Hylastes species are of economic importance, damag- H. parallelus Chapuis, 1875 is unknown to us and therefore ing root neck or roots of young pines during maturation not included in the key. It is apparently closely related to feeding; this feeding may cause stress and death of H. ater (Paykull, 1800) and H. brunneus (Erichson, 1836) young pines. according to Murayama [1962], but differs from these by the widely rounded, not nearly rectangular, basal angles of pro- notum, the very large and shallow punctures on elytral striae, Material and methods and narrow interstriae. The structure of ventrite 5 in the male in H. parallelus is undescribed in literature. Nobuchi [1969] Specimens were collected by the authors from 1975 made notes on the proventriculus of but without illustrations. This description did not allow us to establish differences to 2019 in the forests of the Russian Federation, includ- between H. paralellus and H. brunneus. ing European part of Russia (Belgorod, Ivanovo, Kalin- ingrad, Kaluga, Kursk, Leningrad, Moscow, Novgorod, KEY TO THE HYLASTES SPECIES OF RUSSIA AND NEIGHBORING Pskov, Tambov, Tula, Tver, Vladimir, Vologda, Vor- COUNTRIES. onezh, Yaroslavl Provinces), Republic of Crimea, Re- 1. Pronotum subrectangular, anterior half wider or of equal public of Karelia, North and North-West Caucasus width to the posterior half, 1.2–1.35 x as long as wide, (Krasnodar Terr., Adygeya Republic, Dagestan Repub- pronotal disc with strong elongated punctures,