Diptera.info :: Identification queries :: Diptera (eggs, larvae, pupae)
 Hydrellia pupa
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| atylotus |
Posted on 30-09-2014 10:06
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 Member Location: Amsterdam, NL Posts: 1166 Joined: 29.05.09 |
On several locations I have found this Hydrellia pupa which differ from many other species of Hydrellia by its black dorsal markings and, what appears to be, anterior spiracles. The constricted abdominal segments show an extra smaller ring in the intersegmental furrow, which I have never seen in other Hydrellia. Can these combination of characters be attributed to a specific species? As in other Hydrellia (and Notiphila) the anal segments shows 2 (curved) spines, but unlike Notiphila the cephalopharyngeal skeleton is more simply built. I'm not sure if these paired black spines on the head are indeed anterior spiracles, for these are normally absent in Hydrellia larvae. However, in many diptera larvae, which normally have no anterior spiracles, they may develop when the larva pupates. Pupa are found early september. atylotus attached the following image:  [50.72Kb] Edited by atylotus on 30-09-2014 10:13 |
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| Tony Irwin |
Posted on 30-09-2014 21:01
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 Member Location: Norwich, England Posts: 7302 Joined: 19.11.04 |
Looking at your photos, I wonder whether this is a parasitised Hydrellia pupa, the parasitoid causing some problems, such as non-absorption of the larval antennae (which seem to me to be too far forward for anterior spiracles).
Tony ---------- Tony Irwin |
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| atylotus |
Posted on 21-12-2017 14:41
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Member Location: Amsterdam, NL Posts: 1166 Joined: 29.05.09 |
Just today I have found again such a pupa, but with a fly inside and with no sign of a parasite/parasitoid. I expected to find a species of Ichnomeunidae or a close relative.
atylotus attached the following image:  [60.84Kb] Edited by atylotus on 21-12-2017 14:44 |
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| atylotus |
Posted on 21-12-2017 14:45
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Member Location: Amsterdam, NL Posts: 1166 Joined: 29.05.09 |
in ventral view
atylotus attached the following image:  [59.11Kb] Edited by atylotus on 21-12-2017 14:45 |
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| atylotus |
Posted on 21-12-2017 14:45
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Member Location: Amsterdam, NL Posts: 1166 Joined: 29.05.09 |
anterior part in detail
atylotus attached the following image:  [104.52Kb] |
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