Millipedes and centipedes (Myriapoda: Diplopoda, Chilopoda) in Swiss heated greenhouses, with seven species new for Switzerland

The international plant trade provides opportunities for the introduction of exotic species into tropical greenhouses around the world. The millipede and centipede fauna of greenhouses is barely known in Switzerland. We conducted a survey in greenhouses of nine botanical gardens and other institutions across Switzerland. We captured and identified 1390 individuals belonging to 14 millipede species and 43 individuals belonging to 9 centipede species. Most millipede individuals recorded (80.3%) were non-native as were the species (8/14). Most centipede individuals (55.3%) were non-native, but not the majority of the species (4/10). The species composition varied strongly among greenhouses with species originating from different parts of the world. Seven species already known from greenhouses in other European countries are reported for the first time in Switzerland. These are the millipedes Cylindrodesmus hirsutus Pocock, 1889, Poratia obliterata (Kraus, 1960), Paraspirobolus lucifugus (Gervais, 1836) and the centipedes Mecistocephalus guildingii Newport, 1843, Tygarrup javanicus Attems, 1929, Lamyctes (Lamyctes) coeculus (Brölemann, 1889b), and Cryptops (Cryptops) doriae Pocock, 1891. The relevance of these findings is discussed.