Diptera.info :: Identification queries :: Diptera (adults)
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Dolichopodidae from USA
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Isidro |
Posted on 17-08-2019 19:32
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Member Location: Zaragoza, Spain Posts: 2057 Joined: 26.04.07 |
Boston, Massachusetts. 24th July 2019. On a wooden fence that divides a forest from a park. Any help with ID appreciated! Thanks! |
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John Carr |
Posted on 18-08-2019 00:58
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Member Location: Massachusetts, USA Posts: 9839 Joined: 22.10.10 |
Dolichopus or Gymnopternus |
Isidro |
Posted on 18-08-2019 06:11
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Member Location: Zaragoza, Spain Posts: 2057 Joined: 26.04.07 |
Thanks, not possible to distinguish between both genus? |
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John Carr |
Posted on 18-08-2019 18:23
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Member Location: Massachusetts, USA Posts: 9839 Joined: 22.10.10 |
If there are bristles on the hind basistarsis and vein M is bent abruptly in the middle of the last section as seen from above, Dolichopus. If the hind basitarsus is bare and vein M is nearly straight in the middle, Gymnopternus. What I can see of the color, bronze stripe on thorax and pale lower postocular hairs, is more typical of Dolichopus. Also, Gymnopternus usually has a row of short bristles on the fore tibia where long bristles are visible. |
Isidro |
Posted on 18-08-2019 21:00
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Member Location: Zaragoza, Spain Posts: 2057 Joined: 26.04.07 |
s Joh, I fear that the hind tarsi are not enough in focus for distinguish the bristles. If generic identification is nearly impossible I suppose that specific ID will be much so. |
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