| 1. |
- A, Komonen, et al.
(författare)
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Insects associated with fruit bodies of the wood-decaying fungus Oak mazegill (Daedalea quercina) in mixed oak forests in southern Sweden
- 2012
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Ingår i: Entomologisk Tidskrift. - 0013-886X. ; 133:4, s. 173-181
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Tidskriftsartikel (refereegranskat)abstract
- Polypores host species rich insect assemblages, but relatively few polypore species have been studied in detail. We investigated insect assemblages associated with the fruit bodies of Daedalea quercina, a specialist species on oak in southern Sweden. Fruit bodies (n = 228) were collected from 25 nature reserves and woodland key habitats, and were taken into the laboratory to collect emerging insects. A total of 245 insect individuals were recorded, belonging to at least 45 species. The numerically dominant fungivores were the tineid moths Montescardia tessulatella (n = 38 individuals) and Nemapogon fungivorellus (n = 10) and the coleopteran Ennearthron cornutum (Ciidae) (n = 44). Altogether 40 individuals of hymenopteran parasitoids were recorded, belonging to Braconidae (Exothecinae, Microgastrinae and Rogadinae, altogether 6 spp.), Ichneumonidae (Banchinae, Cryptinae and Orthocentrinae, altogether 4 spp.), Torymidae (1 sp.), Perilampidae (1 sp.) and Scelionidae (1 sp.). Most of the remaining insect species are not specifically associated with fruit bodies, but occupy many types of decaying material. In conclusion, D. quercina hosted a low number of insect individuals in general and only a few coleopteran species. The fungus apparently has only one specialist species, N. fungivorellus, which is a near-threatened (NT) species on the Swedish red list; the record from Norra Vi is the first from the Jönköping. The overall low number of insect individuals and the dominance of Lepidoptera among the fungivores is possibly explained by the tough fruit bodies of D. quercina, which only moths are able to utilize; fruit bodies which had already started to rot were devoid of moths.
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| 2. |
- Albrectsen, Benedicte R., et al.
(författare)
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The diversity and identification of eulophid parasitic wasps (Hymenoptera: Chalcidoidea: Eulophidae) on Phyllocnistis labyrinthella (Lepidoptera: Gracillariidae) from Västerbotten, Sweden.
- 2012
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 133:3, s. 111-118
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Tidskriftsartikel (refereegranskat)abstract
- Caterpillars of the mining micro-moth Phyllocnistis labyrinthella feed on leaves of aspen (Populus tremula) and are often parasitized by eulophid wasps. The parasitoids are a potential important cause of death for the miners. During 2009-2011 we collected mined leaves from an experimental stand of aspen trees in Västerbotten. Adults emerged from 17-35 percent of the mines and of these every second to third specimen appeared as wasps. These wasps represented seven species of eulophid parasitoids of which three were new to Västerbotten: Chrysocharis nitetis (Walker), Cirrospilus diallus (Walker) and Cirrospilus pictus (Nees). We include an identification key that may be used to identify these eulophid species.
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| 3. |
- Anderbrant, Olle, et al.
(författare)
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The European birch sawfly, Arge pullata(Hymenoptera: Argidae), in Sweden, and the firstnational record of its parasitoid Scolobates testaceus(Hymenoptera: Ichneumonidae)
- 2019
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 140, s. 59-64
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Tidskriftsartikel (refereegranskat)abstract
- The European birch sawfly Arge pullata (Zaddach) was found for the first time in Sweden in the early 2000s. According to a report in the local newspaper it was present on the Falsterbo peninsula, Skåne province, from 2000 at the latest, and in the following years a number of records were reported from the same restricted area. Subsequently it has expanded its range in southern Sweden. It is unusual that a sawfly receives public attention, but in the case of this species its presence is of general interest because of the toxic properties of its larvae, which can be consumed by cattle and pets. Here we give a short description of thebiology of the species, its spread in southern Sweden, and report the first record in Sweden of its parasitoid Scolobates testaceus Morley, which is also the first record of S. testaceus from A. pullata. We speculate that this and possibly other natural enemies have attenuated the spread and build-up of large populations, which were feared when the species was first detected in the country.
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| 4. |
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| 5. |
- Antonsson, Kjell, et al.
(författare)
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Occurrence of the hermit beetle (Osmoderma eremita), in Sweden.
- 2003
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 124:4, s. 225-240
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Tidskriftsartikel (refereegranskat)abstract
- We have compiled data on the occurrence of a threatened beetle, Osmoderma eremita, in Sweden. The species inhabits tree hollows with wood mould. The data were compiled from field surveys conducted in 1993-2003, using pitfall traps at 401 localities and using wood mould sampling at 104 localities. We have also gone through published data and all larger Swedish museums and registered old records. O. eremita was recorded at about 30% of the field surveys. In Sweden, oak is by far the most important host tree species, but the beetle has also been found in other deciduous trees, such as beech, alder, ash and lime. Currently, 270 localities with Osmoderma eremita, defined as records of living adults, larvae, fragments of adult body parts, or excrements situated at least 1 km from each other, are known in Sweden. 129 of these localities are records of live beetles or larvae made after 1990. The species is found in the southern third of Sweden only, and there are more localities in the eastern part compared to the western. The great majority of the localities have been discovered during the last ten years. At some of the localities only excrements or fragments have been recorded, and the species might actually be extinct at some of these localities. Due to low search intensity historically, it is impossible to use these data to discover any changes in the distribution or occurrence over time. Because old, hollow oaks were much more frequent 200 years ago, we suggest that the species has decreased severely in Sweden since that time. Today, old oaks are rarely cut down but instead lack of grazing cattle is a threat because many sites regrow with dense tree stands which outcompete the old hollow trees. Many local extinctions could also be expected during the next few decades, because many of the localities have too few hollow trees and are too isolated. At many localities, lack of younger trees which can take over the role as host trees when the present trees die will also be a problem in the future.
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| 6. |
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| 7. |
- Berglind, S.-A., Ehnstrom, B. and Ljungberg, H.
(författare)
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Riparian beetles, biodiversity, and stream flow regulation - the examples of Svartån and Mjällån streams, Central Sweden
- 1997
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Ingår i: Entomologisk Tidskrift. - : The Entomological Society of Sweden, Umeå. - 0013-886X. ; 118:4, s. 137-154
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- In Sweden, 70% of running waters have been exploited for hydropower purposes. Although hydroelectric power plants in small running waters, i.e. streams, contribute only 1% of the total electric production in Sweden, and the prospects for increasing this p
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| 8. |
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| 9. |
- Bergsten, Johannes, 1975-, et al.
(författare)
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Arbetet med donationer av insektsamlingar vid Naturhistoriska Riksmuseet
- 2014
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Ingår i: Entomologisk Tidskrift. - 0013-886X. ; 134, s. 153-162
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Tidskriftsartikel (populärvet., debatt m.m.)abstract
- We describe the work with donated insect collections at the Swedish Museum of NaturalHistory (NRM) in Stockholm, Sweden. The museum receives donations yearly fromamateur entomologists, and they are an important contribution to the enrichment of thecollections. For the collector it is satisfying that a public institution takes on the long termresponsibility of safeguarding the scientific value in a collection, curating and making itavailable for study. Significant donations in the last years include that of Lars Huggert(Hymenoptera, Coleoptera), Hans Bartsch (Diptera) and Anders N. Nilsson (aquatic Coleoptera)to name a few. The curatorial and digitizing workload at the Entomology collectionare unfortunately not matched by staff funding, and as at other European museumsvolunteer work constitute vital and invaluable help. We acknowledge especially some ofthe volunteer work in the Coleoptera and Hymenoptera collections. Recently we have engagedwith amateur entomologists by organizing taxon-specific workshops at the museumwhich has stimulated exchange and collaboration. The Hymenoptera-day was visited by 30participants, and the Diptera-meeting by 49. As an example of what happens with a donationonce it reaches the museum, we describe the work with a recent Coleoptera collectiondonation by Jan Olsson, Vallentuna. A few highlights from the unidentified material,including the Archostematan beetle Priacma serrata (Cupedidae) and the false jewelbeetleSchizopus laetus (Schizopodidae), are presented as they were new to the NRM collections.We also bring attention to two new websites: www.naturarv.se is the webportal presentingdigitized material in Swedish natural history collections. Both metadata on specimens andphotos are made searchable here. We also launch a new webpage at www.nrm.se/insektsdonationerwhere we write about new donations to the Entomology collections, with JanOlsson’s Coleoptera collection first out.
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| 10. |
- Bergsten, Johannes, 1975-, et al.
(författare)
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Distoleon tetragrammicus (Fabricius, 1798) ny myrlejonslända för Norden och en illustrerad nyckel till arterna (Neuroptera: Myrmeleontidae).
- 2022
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Ingår i: Entomologisk Tidskrift. - 0013-886X. ; 143:1-2, s. 25-37
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Tidskriftsartikel (refereegranskat)abstract
- We report the first finding of the antlion Distoleon tetragrammicus (Fabricius, 1798) fromSweden. Several adults of the species have been collected or photographed on the island ofGotland in the Baltic Sea, between 2017 and 2021. The first finding is from Tofta skjutfält,a sandy military training ground vegetated with pines and mixed forests on the west coastof Gotland. Based on multi-year observations at the same locality as well as video recordingof an egglaying female it is clearly a resident population, even though larvae are yet to bedocumented. Distoleon tetragrammicus is not previously known from any of the Nordic orBaltic countries. The species is common in southern Europe with a wide distribution acrosswest palearctic and becomes rarer towards central Europe. The closest known locality isan outpost population on the Hel peninsula on the Polish Baltic coast which we speculateis the most probable source, 240km south of Gotland across the Baltic sea. Previously butthree species of antlions were known from the Nordic-Baltic countries, all belonging to thetypical pitfall trap-building tribe Myrmeleontini and subfamily Myrmeleontinae: Myrmeleonformicarius (Linnaeus, 1767), Myrmeleon bore (Tjeder, 1941) and Euroleon nostras (Geoffroyin Fourcroy, 1785). Distoleon tetragrammicus belongs to subfamily Nemoleontinae (tribeNemoleontini) with larvae being ambush predators without the behaviour of building pitfalltraps. We provide an identification key, as well as studio and field photographs of all fourNordic species. The quality and conservation value of Tofta military training ground localityfor insects is discussed with reference to other rare species.
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