Invasive alien species in Switzerland - Schweizer ...

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An inventory of alien species and their threat to biodiversity and economy in Switzerland FOEN 2006 102 side due to their climatic requirements. They can also be introduced into houses, e.g. with flowers (e.g. Eperigone eschatological (Crosby)). > ‘Banana spiders’: spiders which are introduced with fruit commodities, especially bananas. They are often rather spectacular individuals, but they are not able to establish in our climate. > Terrarium species: spiders, mostly tarantulas/theraphosids (so-called ‘bird-eating spiders’) from warm regions, which escape captivity, but cannot breed in the Central European climate and at the most survive until the following winter. The orders Araneae (spiders), Opiliones (harvestmen) and Pseudoscorpiones (false scorpions) within the class Arachnida are covered in this report. Acari (ticks and mites), although very important for the agricultural and the health sectors, are not included in this review, because of the difficulties of preparing comprehensive lists and their minor relevance for the environmental sector. Species which were introduced to Switzerland more than a few decades ago are not included, because of their largely unresolved status. Thus, the wasp spider (Argiope bruennichi (Scopoli)) is not included in the list. Additionally, species which besides inhabiting houses and basements also live in caves, rock screes, walls in vineyards or quarries, as for example the genus Pholcus or the jumping spider Salticus scenicus (Clerck), are not discussed here. The main general literature sources for the report are Thaler and Knoflach (1995), Geiter et al. (2002) and Komposch (2002). Knowledge about synanthropic spiders and their relatives in Switzerland is extremely limited. Therefore many observations discussed in the report are based on knowledge, although likewise rudimentary, accumulated in other Central European countries, and extrapolated to Switzerland. The situation in these countries will be similar to that in Switzerland and including the information gives a more comprehensive picture of the alien spider fauna of Central Europe. Generally, synanthropic spiders seem to attract less attention than species inhabiting natural habitats even among arachnologists or, rather, little is published about them. The spitting spider Scytodes thoracica (Latr.) is an example of a spider almost exclusively found in houses in Central Europe; its distribution is fairly well-known by arachnologists, but there are few publications about it. The same is true for species of the genus Araneus, which frequently occur in houses and gardens. 5.2 List of species Table 5.1 introduces the species mentioned in this report.
5 > Spiders and Allies – Arachnida 103 Tab. 5.1 > Species mentioned in this report, named after Platnick (2004). Species name Author, Year Family Habitat Achaearanea tabulata * Levi, 1980 Theridiidae In houses Artema atlanta * Walckenaer, 1837 Pholcidae In houses Astrobunus laevipes * (Canestrini, 1872) Phalangiidae Natural Chelifer cancroides (L., 1758) Cheliferidae In houses Cicurina japonica (Simon, 1886) Dictynidae Natural Coleosoma floridanum Banks, 1900 Theridiidae Greenhouses Collinsia inerrans (O. P.-Cambridge, 1885) Linyphiidae Natural Dasylobus graniferus (Canestrini, 1871) Phalangiidae Natural Dictyna civica (Lucas, 1850) Dictynidae On buildings Diplocephalus graecus * (O. P.-Cambridge, 1872) Linyphiidae Natural Eperigone eschatologica (Crosby, 1924) Linyphiidae Greenhouses Eperigone trilobata (Emerton, 1882) Linyphiidae Natural Erigone autumnalis Emerton, 1882 Linyphiidae Natural Harpactea rubicunda (C.L. Koch, 1838) Dysderidae In houses, but also natural Hasarius adansoni (Audouin, 1826) Salticidae Greenhouses Heteropoda venatoria (L., 1767) Sparassidae Greenhouses Holocnemus pluchei (Scopoli, 1763) Pholcidae In houses Micropholcus fauroti * (Simon, 1887) Pholcidae In houses Nesticus eremita Simon, 1879 Nesticidae Natural Oecobius maculatus Simon, 1870 Oecobiidae Natural Opilio canestrinii (Thorell, 1876) Phalangiidae On buildings Ostearius melanopygius (O. P.-Cambridge, 1879) Linyphiidae Natural Pseudeuophrys lanigera (Simon, 1871) Salticidae On buildings Psilochorus simoni (Berland, 1911) Pholcidae In houses Thanatus vulgaris * Simon, 1870 Philodromidae Greenhouses Uloborus plumipes Lucas, 1846 Uloboridae Greenhouses Zodarion italicum (Canestrini, 1868) Zodariidae Natural Zodarion rubidum Simon, 1914 Zodariidae Natural Zoropsis spinimana (Dufour, 1820) Zoropsidae In houses *Species not yet recorded from Switzerland. 5.3 Species of natural habitats Eperigone trilobata (Emerton) This spider has a wide distribution range in North America (Millidge, 1987) and was first recorded from Europe in the 1980s at Karlsruhe, Germany. A catalogue of Swiss spiders (Maurer and Hänggi, 1990) noted several records from the Swiss cantons Jura and Ticino. This species is a common member of the spider fauna in all open habitats (e.g. Blick et al., 2000) and was first recorded in the Jura in 1999 at about 800 m above sea level (T. Blick, unpubl.).
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