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Wingless Fly - Chonocephalus heymonsi

Wingless Fly - Chonocephalus heymonsi
Baton Rouge, LSU campus, East Baton Rouge Parish, Louisiana, USA
September 28, 2013
Size: 1 mm
Collected from rotting fruit.

Can you share your how you prepared this mount? I have a compound microscope and really want to try something like this eventually!

The specimen is in alcohol. I
The specimen is in alcohol. I got lucky that it was willing to orient on its side like that for the picture. I used a dissecting scope. For a compound scope, if you have a depression side you may be able to fill it with ethanol, glycerol, or hand sanitizer (essentially gelled alcohol) and orient the specimen the way you want it. Cover with a cover slip. Take multiple photos as you shift the plane of focus, then melt them together with the program CombineZP ( Cheers.

K-Y also works
coat the bottom of the dish with k-y with ethanol on top, and you can manipulate the specimen and hold it in place for photos

Moved from Chonocephalus.

Moved from Scuttle Flies.

Moved from ID Request.

Wingless Fly

The long frons and the shape of the prothorax point out Conocephalus sp., but I'm not 100% sure.

Chonocephalus heymonsi
I'm pretty sure this is Chonocephalus heymonsi Stobbe, no surprise based on location. From Disney (2002), the two main suspects are C. heymonsi, and C. americanus due to known range. In the key to females C. americanus and C. fletcheri are kicked out because they lack "submarginal dark bands at rear of abdominal tergites", which this specimen has. Checking under a compound scope the microsetae match those of C. heymonsi figured in Disney (2002) which separates it from other known female Chonocephalus species.

Should I create a page for Chonocephalus heymonsi?

Sure if you want.

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