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FIRST RECORDS OF TWO REMARKABLE COLEOPTERA SPECIES CUCUJUS CINNABERINUS AND METOECUS PARADOXUS (COLEOPTERA: CUCUJIDAE, RHIPIPHORIDAE) FROM THE REPUBLIC OF KARELIA (RUSSIA)
Alexei V. Polevoi1, Andrei E. Humala1, Elena V. Kulebyakina2, Nadezhda N. Kutenkova3
1 Forest Research Institute of Karelian Research Centre of RAS, Russia e-mail: alexei.polevoi@krc.karelia.ru, humala@krc.karelia.ru 2National Park «Vodlozersky», Russia
e-mail: vodloz_no@mail.ru 3State Nature Reserve «Kivach», Russia e-mail: kutenkova.nn@mail.ru
Received: 20.03.2018
Viable populations of two remarkable Coleoptera species - Cucujus cinnaberinus (Cucujidae) and Metoecus paradoxus (Rhipiphoridae) are reported for the first time from the Republic of Karelia (Russia). Cucujus cinnaberinus is a threatened species in northern Europe while Metoecus paradoxus is a widespread Palaearctic species actively dispersing northwards. Both species were found in the nature protected areas by the local staff. This evidences the importance of such territories for preserving and monitoring the populations of rare and poorly known species.
Key words: Coleoptera, Cucujidae, Karelia, Rhipiphoridae, rare species
Introduction
The Coleoptera fauna of Karelia is relatively well studied, largely due to the works of Finnish researchers who, since the end of the nineteenth century, published extensive lists, mainly based on material collected in the southern regions of the republic (Poppius, 1899; Palmen, 1946). Some more recent studies consider particular taxonomic (Tito-va, 1959; Makarov & Shorokhov, 1986; Uzenbaev et al., 1986) and ecological (Jakovlev et al., 1986; Mozolevskaya et al., 1991) groups or summarise observations from certain protected areas (Rutanen & Kashevarov, 1997). Others provide the Coleoptera species lists for limited geographical regions as a part of more general entomological surveys (Ya-kovlev et al., 2000; Humala & Polevoi, 2009; Jakovlev et al., 2014). The latest additions to the Karelian fauna include some rather rare saproxylic species (Siitonen et al., 1996; Martikainen et al., 2014; Polevoi et al., 2017) and species dispersing northwards or introduced by people (Humala & Polevoi, 2015). In this paper, we give new data on two Coleoptera species Cucujus cinnaberinus (Scopoli, 1763) and Metoecus paradoxus (Linnaeus, 1761) representing an important addition to the Karelian fauna.
Material and Methods
This communication is based on authors' observations in the State Reserve «Kivach» and the National Park «Vodlozersky», Karelia, Russia (Fig. 1). Specimens ofM. paradoxus are stored in the col-
lections of Forest Research Institute (Petrozavodsk) and State Reserve «Kivach». The male of C. cinna-berinus was released after taking photographs.
Results
Family Cucujidae Cucujus cinnaberinus (Scopoli, 1763) Material. Russia, Karelia, National Park «Vodlozersky», 62.15°N, 36.80°E, 10 km SW of Kuganavolok, 10.06.2017. One male specimen was observed, at the base of a large aspen tree (Fig. 2). The beetle was actively moving on the trunk surface from the base to a height of about 1 m. The site (Vaccinium myrtillus L. type spruce-dominated forest, about 180 years old, with an admixture of pine, birch and aspen) is located along a dirt road. Some large aspens (trunk diameter 50-60 cm) were felled during roadworks. The remaining alive aspens have a diameter of 35-45 cm.
Distribution. Found throughout most of Europe but largely absent in the south and west (Horak et al., 2010; Nieto et al., 2010). In the middle of XX century several specimens of C. cinna-berinus were found in the areas of the Leningrad province, neighbouring to Karelia - Gumbaritsy (Palmen, 1946). The record by J. Siitonen with coauthors (1996) from Kuganavolok refers to elytra found under the bark of aspen (P. Martikainen, pers. comm.). A new observation from Karelia is hence the first one, confirming the presence of a viable population in the republic.
Fig. 2. Cucujus cinnaberinus, male. Photo by E.V. Kulebyakina.
Biology. Saproxylic species, living under the bark of a variety of broad-leaved trees and rarely on conifers (Nieto et al., 2010). In Finland it prefers fallen aspen logs with loose bark (J. Siitonen, pers. comm.). Larvae and adults are predators of saproxylic invertebrates (Mazzei et al., 2011). Horak et al. (2010) discussed habitat preferences of this species in the Czech Republic.
Remarks. The species is categorised as «Near Threatened» in the IUCN Red List (Nieto et al.,
2010). It is expanding in central-eastern Europe and on some colder Mediterranean mountains, but declining in the surrounding areas (Horak et al., 2010; Mazzei et al., 2011; Sag et al., 2016). The status of the populations in European Russia is not clear due to scarce records. Classified as Critically Endangered in Karelia (Ivanter & Kuznetsov, 2007), and Rare (category 3) in Voronezh province (Negrobov,
2011). Threat factors include fragmentation and increasing isolation of beetle populations due to forestry, removal, and destruction of large trees.
Family Rhipiphoridae Metoecus paradoxus (Linnaeus, 1761) Material. Russia, Karelia, State Reserve «Ki-vach», 62.27°N, 33.98°E, 12.09-16.10.2017. Seven males and two females were collected inside the laboratory building, located at the edge of the main settlement of the nature reserve, between herb-rich meadow and mixed forest.
Distribution. Palaearctic, from Great Britain to Japan (Heitmans & Peeters, 1996). In Russia -south and central European parts, northwards to Leningrad province (Iablokoff-Khnzorian, 1976).
Biology. Heitmans & Peeters (1996) summarised the complex life history of M. paradoxus which is an obligatory parasite, developing in full-grown larvae of social wasps of the genera Vespula Thomson, 1869 and Dolichovespula Rohwer, 1916. According to Van Oystaeyen et al. (2015), emerged beetles mimic the methylalkane profile of their main host V. vulgaris (Linnaeus, 1758) to avoid detection. Specimens collected by the authors (Fig. 3) evidently penetrated into the building from a wasp nest located in the neighbourhood. Some females still bore the remnants of pupal shell on the body.
Fig. 3. Metoecus paradoxus, male. Photo by N.N. Kutenkova.
Remarks. Though there is a chance that M. paradoxus might have been overlooked due to its cryptic way of life, we believe that this species is a real newcomer to Karelia. For example, in the State Reserve «Kivach», it has not been recorded during continuous annual light trapping since 1991 (Kutenkova, 1997, 2006, 2016), though is known to be attracted to light (Heitmans & Peeters, 1996). In Norway, Sweden and Finland M. paradoxus has considerably advanced northwards during recent years (Fig. 4). The new record from Karelia indicates a similar trend in north-western Russia, which has been already observed in other insect species (Humala & Polevoi, 2015).
Conclusions
The network of nature protection areas in Karelia provides an excellent base for researchers in the field of biology. Strictly protected territories usually are the best choice for long-term ecological and faunistic studies, and most of the recent additions to the insect fauna of Karelia are the result of such studies. Both species considered in this paper were found in protected areas and, what is more important, were detected by the local staff, partly by not professional entomologists. This once more evidences the importance of such territories for preserving and monitoring the populations of rare and poorly known species.
Acknowledgements
Authors sincerely acknowledge valuable comments of anonymous reviewers on the manuscript. The study was carried out under state order to the Karelian Research Centre of the Russian Academy of Sciences (Forest Research Institute KRC RAS). The work of E.V. Kulebyakina and N.N. Kutenkova was implemented under state assignment of Ministry of Nature Resources of the Russian Federation (051-00023-17-00 and 051-03-2018-048).
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Fig. 4. Occurrences of Metoecus paradoxus in Norway, Sweden and Finland up to 2000, 2010 and 2017. (Data from www. gbif.org: GBIF occurrence download https://doi.org/10.15468/dl.bukjzr).
References
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ДВА ПРИМЕЧАТЕЛЬНЫХ ВИДА ЖЕСТКОКРЫЛЫХ CUCUJUS CINNABERINUS И METOECUS PARADOXUS (COLEOPTERA: CUCUJIDAE, RHIPIPHORIDAE) ВПЕРВЫЕ НАЙДЕНЫ В КАРЕЛИИ
А. В. Полевой1, А. Э. Хумала1, Е. В. Кулебякина2, Н. Н. Кутенкова3
1Институт леса Карельского научного центра РАН, Россия e-mail: alexei.polevoi@krc.karelia.ru, humala@krc.karelia.ru 2Национальный парк «Водлозерский», Россия
e-mail: vodloz_no@mail.ru 3Государственный заповедник «Кивач», Россия e-mail: kutenkova.nn@mail.ru
На территории Республики Карелия (Россия) впервые обнаружены жизнеспособные популяции двух примечательных видов жесткокрылых - Cucujus cinnaberinus (Cucujidae) и Metoecus paradoxus (Rhipiph-oridae). Cucujus cinnaberinus является угрожаемым видом в Северной Европе, а Metoecus paradoxus - широко распространенный палеарктический вид, активно продвигающийся в северном направлении. Оба вида были обнаружены штатными сотрудниками на особо охраняемых природных территориях. Новые находки подчеркивают важность заповедников и национальных парков для сохранения и мониторинга популяций редких и слабо изученных видов насекомых.
Ключевые слова: Coleoptera, Cucujidae, Rhipiphoridae, Карелия, редкие виды
