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 Tephritis couple - T. crepidis?
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| Sundew |
Posted on 03-05-2020 17:37
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 Member Location: Posts: 3890 Joined: 28.07.07 |
Hi, On May 22, 2019, I saw several couples of Tephritis on Crepis biennis. Though T. conyzaefoliae and T. crepidis are difficult to tell apart, I hope the hostplant speaks for the latter! The location is southwestern Germany, about 20 km west of Stuttgart. Thanks for help, Sundew |
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| Ben Hamers |
Posted on 04-05-2020 16:45
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Member Location: Posts: 735 Joined: 16.12.04 |
Yes, Crepis biennis makes it Tephritis crepidis. Ben |
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| Sundew |
Posted on 04-05-2020 23:11
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Member Location: Posts: 3890 Joined: 28.07.07 |
Good to know! It is always worthwhile to take a note of the host plant. Thank you!
Edited by Sundew on 04-05-2020 23:11 |
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| Ben Hamers |
Posted on 05-05-2020 09:34
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Member Location: Posts: 735 Joined: 16.12.04 |
Be aware that there is another Tephritis on another Crepis. Where I live they are sitting next to each other on a grassland, T. crepidis on C. biennis and T. matricariae on C. taraxacifolia. Apart from the size I'm not able to separate the two Crepis sp, so I need the fly to recognise the plant. Ben |
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| Sundew |
Posted on 05-05-2020 14:54
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Member Location: Posts: 3890 Joined: 28.07.07 |
That's funny - plant identification via fly species! (Crepis taraxacifolia has meanwhile again been degraded to a subspecies of C. vesicaria.) I learnt, however, that the two taxa prefer not exactly the same habitat. C. v. subsp. taraxacifolia seems to be more ruderal and grows on drier sites (on slopes, walls...), whereas C. biennis is a typical constituent of fertile meadows. According to the species composition of the meadow where I saw the flies, I suppose it was sown, and C. biennis is a component of commercial seed mixtures. Nevertheless I will look more closely to the species characters this year to avoid any confusion. |
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but don't see the image in the post.
