Diptera.info :: Identification queries :: Diptera (eggs, larvae, pupae)
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 Tetanocera ferruginea > Elgiva sp.
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| solito de solis |
Posted on 12-04-2017 11:26
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 Member Location: Liege, Belgium Posts: 404 Joined: 05.08.13 |
Hey, this aquatic Brachycera larvae observed alive on the water surface of a pound amid Lemna minor 4mm length when extended  float hairs on spiracular disk    ventral aspect  CEPHALO-PHARYNGEAL SKELETON  ventral arch  litterature on the web   thanks for help SDS Edited by solito de solis on 18-04-2017 18:37 |
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| solito de solis |
Posted on 12-04-2017 19:58
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Member Location: Liege, Belgium Posts: 404 Joined: 05.08.13 |
an extra picture head and thoracic part in dorsal view, extended 
Edited by solito de solis on 12-04-2017 19:59 |
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| solito de solis |
Posted on 16-04-2017 21:54
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Member Location: Liege, Belgium Posts: 404 Joined: 05.08.13 |
Hi this afternoon, Easter day, I found in a fresh sample of the same water another larva quite similar to the first one I presented to you in this topic. I observed it on the surface on water and made a little video to save its behaviour. Very unknown behaviour (to me) I noticed: from time to time the larva "breathes" from the air to the surface and swallows it by pushing it into its abdomen. You will see in the video 
Edited by solito de solis on 16-04-2017 21:56 |
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| atylotus |
Posted on 17-04-2017 09:39
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 Member Location: Amsterdam, NL Posts: 1118 Joined: 29.05.09 |
Definitely Elgiva spec. In this genus the ventral anal lobes are fused at the base and the ventro-lateral lobes are constricted only in the ventral part. ID to species level in young stages are quite difficult if not impossible. In some similar Tetanocera spec. and Sepedon spec. the ventral lobes are not fused at the base and the ventro-lateral lobes are constricted in dorsal and ventral part. |
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| solito de solis |
Posted on 18-04-2017 18:42
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Member Location: Liege, Belgium Posts: 404 Joined: 05.08.13 |
Thanks to you, Atylotus. I think I make big mistakes trying to make pictures on alive specimens and putting back the larvae to the sample. So, I'm loosing good opportunites to fix on pictures the features usefull to go through correct ID. This time I forgot to make a correct picture of these anal lobes I'll take car of your comment, Atylotus. SDS Video of a younger larvae Elgiva sp alive will be continue soon Edited by solito de solis on 18-04-2017 18:44 |
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| solito de solis |
Posted on 19-04-2017 21:00
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Member Location: Liege, Belgium Posts: 404 Joined: 05.08.13 |
The clip with a young larva around 0'35" same as around 4'0"" the larva is breathing and swallowing air with its mouth part we see the air bubbles enter in his trachea I guess it's to remain in equilibrium, floating on the water surface ? YouTube Video merci SDS Edited by solito de solis on 19-04-2017 21:04 |
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| solito de solis |
Posted on 20-04-2017 13:02
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Member Location: Liege, Belgium Posts: 404 Joined: 05.08.13 |
Another larva, less juvenile YouTube Video |
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but don't see the image in the post.
