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Berlin - September

The antennae and some bristles are missing but I believe that this is a Calliopum species. I am seeking a vote of confidence that I am correct with Calliopum (Lauxaniidae).

Thank You for your Time.

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lateral

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Calliopum sp. female.
Regards
Piet

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Thanks Piet. The missing antennae and bristles make me feel less confident.

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now that I am sure this is a Callipum species, I've decided to dissect today. I have a problem with the ac hair count. I cannot see the hairs very well with my microscopes. I am used to the hairs being in single rows. The hairs on this fly are irregular, so I am having trouble counting. I have never before examined a species of Calliopum. I am hoping that someone can confirm that there are six or four rows here. see my attachment. I think that there are six rows.

Further, Shaltalkin's drawings are very strange. I know that this species cannot be Calliopum geniculatum or Calliopum simillimum. I cannot see theac hairs so well but I think that there are six irregular rows of hairs. Thus, this species should be Calliopum aeneum female. Shatalkin's drawing for Calliopum aeneum looks nothing like the genitalia of my examination. I have no idea what he is looking at for the drawing. Dorsal, ventral and lateral views look different to me. I will assume that this species is Calliopum aeneum unless someone can profess otherwise ...

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six or four rows?

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Definitely female genitalia of C. similimum

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Good Morning Paul, to imply definitely is questionable using Shatalkin because my dissection does not match Shatalkin's drawings at all. Further, Calliopum simillimum is not recorded in Berlin according to the Entomologische Gesellschaft Berlin, so we must be sure that noone can say that I've misidentified it.

However, if Paul Beuk says that it is Calliopum simillimum then it must be so. I've found the Remm_Elberg_1979 pdf on this website in the downloads. I now see that it is definitely Calliopum simillimum. I also see that Shatalkin stinks. He doesn't even offer dorsal, lateral AND ventral views of the genitalia. I am never using Shatalkin again. I'm sticking with the Remm_Elberg document. Thank You for posting this Excellent document and for identifying this specimen.

I doff my hat to you Sir Paul. Thank You.

I've attached the comparison to Shatalkin's bad drawing.

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The line marked with the question mark should be the posterior margin of the preceding segment, which is absent in the picture in the middle (so no comparable structure visible there).

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still doesn't excuse the fact that the drawing as a whole is not correct. Remm Elberg is perfect. The Remm Elberg drawings include lateral and ventral views. The lateral view of Calliopum simillimum of Remm Elberg confirm the species. I wish that I would've found this document yesterday. I'm very Thankful that you have it available at diptera.info. Thank You very much Paul.