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Terellia serratulae : ウィキペディア英語版 | Terellia serratulae
''Terellia serratulae'' is a species of tephritid or fruit flies in the family Tephritidae.〔(Biolib )〕 ==Description== ''Terellia serratulae'' can reach a length of about . This bluish clear-winged fruit fly has an hairy abdomen with a chequered black pattern. The apex of the antennae is reddish or yellow-orange. In the females the length of the ovopositor corresponds approximately to the length of the last three abdominal segments (tergites).〔(Nature Spot )〕〔(Insecten Box )〕 The females deposit eggs into the opened thistle flowerheads. The young larvae start feeding on the achenes of thistles (mainly ''Cirsium'' and ''Carduus'' species), but they do not induce gall-forming. They develop in the flower-heads (capitulum) of thistles in a cocoon of silk and plant hairs (pappus). This univoltine species overwinters in the larval stage. Adults are on the wing from July to September.〔H Michaelis (Competition of Urophora Stylata F. and Terellia Serratulae L. (Dipt., Tephritidae) in the Flowerheads of Cirsium Vulgare )〕
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