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View Thread :: Identification queries :: Diptera (adults)
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Identification of female Tanyptera
John Bratton
#1 Print Post
Posted on 20-02-2019 13:13

Location: Menai Bridge, North Wales, UK
Posts: 642
Joined: 17.10.06

Hello. Can someone clarify how you separate female Tanyptera atrata and nigricornis, please? In the draft British key, it says that atrata has the trochanters orange and females have tergites 1-3 mainly red; while nigricornis has the trochanters black and female tergites 1-2 mainly red.

But in most photos of nigricornis, it has more red than atrata.

For example, compare - Photo Albums: Tanyptera atrata (female) (1)

with - Photo Albums: Tanyptera nigricornis (female) (1)

And what about - Photo Albums: Tanyptera atrata (female) (3)
It has much red on the abdomen, but black trochanters.

Best wishes
John Bratton
#2 Print Post
Posted on 20-02-2019 15:01

Location: Soest, NL
Posts: 18604
Joined: 21.07.04

Dear John

Both spcies are extremely variable, but the colouration of the trochanters is decisive. There was a time I could not believe it myself either...

John Bratton
#3 Print Post
Posted on 21-02-2019 16:14

Location: Menai Bridge, North Wales, UK
Posts: 642
Joined: 17.10.06

Thanks very much.

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Date and time
17 June 2024 08:36


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