Gall midge fauna Cecidomyiidae, Diptera of South Tyrol 3 Gall midges of Sexten Dolomits Die Gallmueckenfauna Cecidomyiidae, Diptera Suedtirols 3 Die Gallmuecken der Sextener Dolomiten

Skuhrava, M.; Skuhravy, V.

Gredleriana 3: 49-76

2003


Accession: 038270382

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Abstract
During investigations in Sexten Dolomits in north-eastern part of South Tyrol 6-20 August 2002, 95 gall midge species associated with 74 host plant species were found at 14 localities situated in subalpine and alpine zones, at altitudes from 1200 m a.s.l. at Innichen (San Candido) up to 2150 m a.s.l. at the Mt. Helm (Mt. Elm). Of these, 12 species are new records for Italy, viz. Contarinia aconitifloris, C. campanulae, C. hyperici, C. lathyri, Dasineura epilobii, D. geranii, D. vulgatiformiae, Jaapiella hedickei, Lestodiplosis cirsii, Macrolabis cirsii, Macrolabis near orobi and Rabdophaga pulvini. Another 9 species, known from other areas of Italy, are new records for the Province of South Tyrol (Bolzano - Alto Adige), viz. Clinodiplosis botularia, Contarinia aequalis, Dasineura cecconiana, D. clematidina, D. similis, Harrisomyia vitrina, Rabdophaga clavifex, R. insignis und Rhopalomyia hypogaea. The present gall midge fauna of Italy includes 409 species and the present fauna of South Tyrol includes 189 species. An annotated list of gall midge species found in Sexten Dolomits in 2002 is given. For each species, collection sites together with biological data are given. New records for Italy (including South Tyrol) are indicated by two asterisks (*) before the species name, new records only for South Tyrol by one asterisk (). A list of host plant species attacked by gall midges is given. Of these, one third (33 gall midge species) are alpine and subalpine species. At individual localities, from 10 to 28 gall midge species were found. The average species number per locality (17 species) is relatively high. The species number decreases with increasing altitude. Frequency: the majority of species were found at only one or two localities. The following species occur abundantly: Wachtliella rosarum on Rosa pendulina, Dasineura viciae on Vicia cracca, Macrolabis ruebsaameni on Prunella grandiflora, Dasineura vitisidaeae on Vaccinium vitis-idaea, Macrolabis heraclei on Heracleum sphondylium. The most abundant species is Wachtliella ericina causing galls on Erica carnea; it has been found at 12 localities. Horizontal distribution: The majority of species are European and Euro-Siberian (97%), one is Holarctic species - Contarinia sp. on Vaccinium uliginosum and two are sub-Mediterranean species, viz. Neomikiella lychnidis on Silene nutans and Wachtliella ericina on Erica carne