Diptera in mines and cave systems in southern Norway

Publication Type:Journal Article
Year of Publication:1993
Authors:Kjærandsen, J.
Journal:Entomologica Fennica

The dipterous fauna in 32 mines, 5 caves and some other cave systems in southern Norway has been studied with regard to species composition and periodicity. Some 20 000 specimens belonging to 80 species in 18 families were recorded. Mycetophilidae (95.0%), Culicidae (3.2%) and Heleomyzidae (1.3%), dominated. With the exception of Speolepta leptogaster (Winnertz, 1863) (Mycetophilidae), a possible troglophile, all species must be regarded as trogloxenes, most of them habitual trogloxenes inhabiting cave systems for hibernation. Some differences regarding species composition in different cave systems and between western and eastern Norway were demonstrated. Seasonal occurrence and sex-ratios reflect different life cycle strategies and seasonal adaptations among the habitual trogloxenes: hibernators, (Mycetophilidae, Culicidae), aestivators (Limoniidae, Bolitophilidae), species which seek cave systems independent of sex and season (Heleomyzidae, Trichoceridae), and opportunists (Chironomidae, Phoridae?, Dixidae?). Species belonging to other families are most likely accidental trogloxenes.

Taxonomic name: 
Sciaroidea (Classification), Bolitophilidae (Classification), Bolitophila (Classification), Bolitophila cinerea (Classification), Mycetophilidae (Classification), Sciophilinae (Classification), Speolepta (Classification), Speolepta leptogaster (Classification), Mycetophilinae (Classification), Exechiini (Classification), Anatella (Classification), Anatella ankeli (Classification), Exechia confinis (Classification), Exechia contaminata (Classification), Exechia cornuta (Classification), Exechia dizona (Classification), Exechia exigua (Classification), Exechia festiva (Classification), Exechia frigida (Classification), Exechia fusca (Classification), Exechiopsis (Classification), Exechiopsis Exechiopsis (Classification), Exechiopsis clypeata (Classification), Exechiopsis distendens (Classification), Exechiopsis dryaspagensis (Classification), Exechiopsis fimbriata (Classification), Exechiopsis hammi (Classification), Exechiopsis indecisa (Classification), Exechiopsis ingrica (Classification), Exechiopsis intersecta (Classification), Exechiopsis januarii (Classification), Exechiopsis lackschewitziana (Classification), Exechiopsis landrocki (Classification), Exechiopsis ligulata (Classification), Exechiopsis pseudindecisa (Classification), Exechiopsis pseudopulchella (Classification), Exechiopsis subulata (Classification), Exechiopsis Xenexechia (Classification), Exechiopsis pollicata (Classification), Pseudexechia (Classification), Pseudexechia trisignata (Classification), Rymosia (Classification), Rymosia affinis (Classification), Rymosia fasciata (Classification), Rymosia placida (Classification), Tarnania (Classification), Tarnania dziedzickii (Classification), Tarnania fenestralis (Classification), Mycetophilini (Classification), Macrobrachius (Classification), Mycetophila (Classification), Mycetophila blanda (Classification), Mycetophila curviseta (Classification), Mycetophila evanida (Classification), Mycetophila ocellus (Classification), Mycetophila ornata (Classification), Mycetophila signatoides (Classification), Mycetophila sordida (Classification), Mycetophila unipunctata (Classification), Phronia (Classification), Phronia bicolor (Classification), Sciaridae (Classification), Lycoriella (Classification), Lycoriella ingenua (Classification), Pseudexechia aurivernica (Classification)
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