The Society for the study of flies (Diptera)
Affiliated to the British Entomological and Natural History Society (BENHS)
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#1 2019-11-26 14:33:07
- colinleb
- DF Members
- Name: Colin Le Boutillier
- From: Luton, Bedfordshire
- Registered: 2008-03-03
- Posts: 271
Anthomyid - Fucellia tergina
Unless I have got the wrong Family - quite possible.
Took me a long time to believe this is an Anthomyid . Round back to the head and obvious costal spines don�t look much like the species I am used to. Still it does have a rather large pair of crossed interfrontals.
Put it through Michael Ackland�s key and it goes quite readily to Fucellia , especially with that obvious process below the base of the hind femur. Thought I must have gone wrong when a quick look at distribution on the NBN website showed they are all coastal and I rarely get outside Beds. Panic over when I checked my data label and see I picked it up from a breakwater on the beach at Walton-on-the-Naze on 16 May this year.
Yellow on legs excludes fucorum , which appears to be a northwestern species in the UK anyway. Not being familiar with either tergina or maritima I am not 100% confident of species but I think it more nearly matches the description and pics of terminalia in Michael�s key for tergina.
Last edited by colinleb (2019-11-26 14:34:19)
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#2 2019-11-26 15:19:23
- Michael Ackland
- DF Members
- Name: Michael Ackland
- Registered: 2008-06-14
- Posts: 200
Re: Anthomyid - Fucellia tergina
It is Fucellia tergina Zett. The lateral view of the hypopygium shows both the epandrium and the cercal plate are somewhat concave. This is a clear distinction from F. maritima Hal. where they are more or less straight. I had not noted this before, as I generally look at the tubercle on the hind femur which is not illustrated in my keys. I have some drawings somewhere of this tubercle and I will send them to you by email if I can find them. Note that F. fucorum has a similar lateral view of the hypopygium, but black legs as you point out.
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