Diptera.info :: Identification queries :: Diptera (eggs, larvae, pupae)
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 Elliptera larvae/pupa -> E. omissa
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| atylotus |
Posted on 18-10-2024 14:08
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 Member Location: Amsterdam, NL Posts: 1140 Joined: 29.05.09 |
These larvae and 1 single pupa was found on littoral stones in the river IJssel at Kampen, The Netherlands (24.iv.2024) and I can only see any resemblance with Elliptera omissa (or perhaps Elliptera hungarica of which I have no description). I have also checked with eastern Palaearctic species in Podeniene et al (2021) and they look quit similar. Except for the pigmentation on the anal lobes in the larvae it all seem to fit. The larvae of E. omissa supposedly do not have any pigmentation but I think that may have been a misjudgment, not sure though. Other Elliptera species do have similar pigmentation of the anal lobes (Podeniene et al 2021). The head is alo entirely black. So, is there anybody that can verify my specimens with Elliptera, omissa or hungarica? and is there any recent paper describing either of these 2 species? Thanks Ton a.k.a atylotus atylotus attached the following image:  [181.6Kb] Edited by atylotus on 19-10-2024 10:18 |
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| atylotus |
Posted on 18-10-2024 14:09
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Member Location: Amsterdam, NL Posts: 1140 Joined: 29.05.09 |
habitus larvae dorsal
atylotus attached the following image:  [129Kb] |
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| atylotus |
Posted on 18-10-2024 14:10
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Member Location: Amsterdam, NL Posts: 1140 Joined: 29.05.09 |
pupa habitus lateral
atylotus attached the following image:  [186.69Kb] |
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| atylotus |
Posted on 18-10-2024 14:10
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Member Location: Amsterdam, NL Posts: 1140 Joined: 29.05.09 |
pupa thoracic horn dorsal, thorax slightly damaged
atylotus attached the following image:  [272.75Kb] Edited by atylotus on 18-10-2024 14:11 |
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| atylotus |
Posted on 18-10-2024 14:12
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Member Location: Amsterdam, NL Posts: 1140 Joined: 29.05.09 |
larvae with closed anal lobes
atylotus attached the following image:  [191Kb] Edited by atylotus on 18-10-2024 14:12 |
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| atylotus |
Posted on 19-10-2024 10:24
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Member Location: Amsterdam, NL Posts: 1140 Joined: 29.05.09 |
I'm pretty much convinced that these are indeed the larvae and pupae of E. omissa. Thanks to Niels-Jan Dek I got the originals of Mik (1886) and Alexander (1920) and it all seem to fit with E. omissa. In the originals of Mik as well as in the translation in Alexander they clearly write that the anal lobes are bordered with a black lining. This can be seen in the original drawings of Mik but for some reason this is omitted in the Alexander drawings. This Alexander-drawing is copied in subsequent papers and interpreted by some authors as having no pigment(stripes) but this is actually false. Also the pupa clearly fits with the original drawings and in my opinion relates to a male pupa. The size and shape of the thoracic horn, the presence of dorsal en ventral pseudopods in 2-7 in larvae and pupae and the black head are all diagnostic
Edited by atylotus on 19-10-2024 10:45 |
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| atylotus |
Posted on 19-10-2024 10:42
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Member Location: Amsterdam, NL Posts: 1140 Joined: 29.05.09 |
originals in Mik (1886)
atylotus attached the following image:  [150.35Kb] |
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