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View Thread :: Identification queries :: Diptera (adults)
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Calypter size
Lothar Schuh
#1 Print Post
Posted on 03-10-2020 19:01

Posts: 131
Joined: 12.07.20

is it "more or less" sufficient to look at the size of calypters:
- both have same size: Anthomyidae
- lower is larger: Musciudae?

Can I get a solid hint?


John Carr
#2 Print Post
Posted on 04-10-2020 14:47
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Location: Massachusetts, USA
Posts: 9234
Joined: 22.10.10

Lothar Schuh wrote:
is it "more or less" sufficient to look at the size of calypters:
- both have same size: Anthomyidae
- lower is larger: Musciudae?

Can I get a solid hint?



That is usually true. There are a few Muscidae with small lower calypters (subfamily Azeliinae, some Coenosiinae) and a few Anthomyiidae with large lower calypters, but not as large as Musca or Phaonia.

You can also look at the hind tibia. Very few Muscidae have 2 or more posterodorsal bristles, and very few Anthomyiidae have fewer than 2. On the thorax, the very few Anthomyiidae with 4 postsutural dorsocentrals have many more hairs on the thorax than similar Muscidae. Very few Anthomyiidae have hairy eyes.

If there are any Drymeia with 4 postsutural dorsocentrals they may be confusing.
Lothar Schuh
#3 Print Post
Posted on 04-10-2020 17:33

Posts: 131
Joined: 12.07.20

Thanks… can you be so kind to specify "hairy eyes". I am just amateur, layman, beginner.
Reading a bit about Chaetotaxy revealed that hairs near the eyes are:
- occipital hair
- fascial hair
- subvibrissal hair
- parafascial hair
- …
where to look at?

Paul Beuk
#4 Print Post
Posted on 04-10-2020 18:30
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Location: Netherlands
Posts: 19148
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See the hairy eyes in this image http://www.tuin-t...5-2014.jpg
Edited by Paul Beuk on 04-10-2020 19:01

- - - -

Paul Beuk on
Lothar Schuh
#5 Print Post
Posted on 05-10-2020 06:56

Posts: 131
Joined: 12.07.20

thank you all!
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