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Diptera.info :: Identification queries :: Diptera (eggs, larvae, pupae)
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Sciomyzidae larva& Any ideas&
chironomus_1990
#1 Print Post
Posted on 16-09-2010 20:58
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Location: Ukraine/Kharkiv
Posts: 41
Joined: 16.09.10

Dear Colleagues This excellent larvae, as I think - Sciomyzidae-I've found in the freshwater sponge (Spongilla lacustris), in the river Seversky Donets, Ukraine. These larvae gnaw tunnels in the sponge, although thesnails were many, but I did not notice that they were attacked by larvae. I would welcome any assumptions of what the larvae.
Sincerely Victor.
chironomus_1990 attached the following image:


[15.47Kb]
 
chironomus_1990
#2 Print Post
Posted on 16-09-2010 21:04
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Location: Ukraine/Kharkiv
Posts: 41
Joined: 16.09.10

and one more photo
chironomus_1990 attached the following image:


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atylotus
#3 Print Post
Posted on 17-09-2010 09:06
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Location: Amsterdam, NL
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Joined: 29.05.09

Dear Chironomus_1990
although the larva resembles a Sciomyzidae, the behaviour is not.
I can think of only one other family with (semi-)aquatic immature stages looking like your larva i.e. Scatophagidae. As your larva looks like a very immature stage (first/second) the behaviour/fouraging method of these larva can be somewhat different of that of later instars. The larva of Scatophagidae with aquatic stages are either (leaf)miners of predatory. You must know that many other insectlarva (for instance Chironomidae- and caddisfly-larva) fourage within freshwatersponges, so you larva may infact not feed on the sponge itself but is hunting for these larva.
According to Smith (1989) Cosmetopus, Microprosopa, Pogonota, Chaetosa, Trichopalpus, Spaziphora, Coniosternum, Acanthocnema and Hydromyza are such genera. If you are able to add a photo of the prothoracic spiracle (a pair of lobed extensions of the trachea on both sides of the second thoracic segment) maybe an identifcation to family level is possible. In the known species of aquatic Scatophagidae this spiracle is multi-branched.
Edited by atylotus on 17-09-2010 09:11
 
chironomus_1990
#4 Print Post
Posted on 17-09-2010 10:34
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Location: Ukraine/Kharkiv
Posts: 41
Joined: 16.09.10

Dear Atylotus! Thank you for your reply! I photograph the anterior spiracles in the near future and lay out. Sincerely Victor
 
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