Diptera.info :: Identification queries :: Diptera (adults)
 posterodosal bristles hind leg
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| Lothar Schuh |
Posted on 07-10-2020 08:24
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Member Location: Posts: 170 Joined: 12.07.20 |
Hello, I riddled a bit about the bristle nomenclature. According to the image I assume - 1,2,3, are "postero… - 6,7,8,9 are "postero…"" - rest is "antero…" Which ones are posterodorsal? Which ones are apical (is apical counted extra). Lothar |
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| Lothar Schuh |
Posted on 07-10-2020 08:26
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Member Location: Posts: 170 Joined: 12.07.20 |
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Lothar Schuh attached the following image:  [90.67Kb] |
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| Tony Irwin |
Posted on 07-10-2020 10:14
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 Member Location: Norwich, England Posts: 7347 Joined: 19.11.04 |
I think the inset drawing is a bit confusing. The thing to remember is that when the leg is folded, the ventral side of the tibia lies along the ventral side of the femur. The dorsal side is opposite the ventral side, and when the leg is held at right angles to the body, the side facing the head is the anterior, and the opposite side is the posterior. So 5 is a posterodorsal, and 1, 6 and 11 are apical. 0, 4 and 10 are pre-apical. (0 appears to be an anterior preapical, 4 an antero-dorsal preapical and 10 a dorsal preapical - always easier to say from a specimen rather than a photo!)
Tony ---------- Tony Irwin |
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| Lothar Schuh |
Posted on 07-10-2020 10:51
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Member Location: Posts: 170 Joined: 12.07.20 |
Thank you Tony for clearly explaining this. For ID: number of posterodorsal on left picture is 1 -> fits to Muscidae number of posterodorsal on right picture is 0 -> fits to Muscidae Anthomyidae tend to have more than 2 (or 2) posterodorsal bristles. Am I pointing in the right direction? Lothar |
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| Tony Irwin |
Posted on 07-10-2020 15:55
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Member Location: Norwich, England Posts: 7347 Joined: 19.11.04 |
Most Anthomyiidae have very bristly legs, but as with all things, I believe there are exceptions. Several Muscidae also have more than 2 or more posterodorsals, but these are usually smaller than that of Phaonia, and often extend into the basal half of the tibia.
Tony ---------- Tony Irwin |
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