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The Society for the study of flies (Diptera)

Affiliated to the British Entomological and Natural History Society (BENHS)

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#1 2018-11-11 19:12:59

sabina
DF Members
Name: Sabina George
Registered: 2017-02-10
Posts: 82

Tipula

I like to iRecord and have tried identifying the common  T.oleracea (dark edge) and T. paludosa by their wings. Is it realistic to be able to do this by photographs alone? If so, are any of these correct? Many thanks. Photos taken in Warwickshire woodland, 09/09/2018


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#2 2018-11-13 12:26:38

johnkramer
DF Members
Name: John Kramer
From: Oadby, Leicester
Registered: 2008-02-20
Posts: 250

Re: Tipula

The wing length of the females is diagnostic.  In T. paludosa the abdomen is conspicuously longer than the wings.  This is not so with the males where the separation of the eyes below the head is much wider in T. paludosa.  (See the key)
John K

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#3 2018-11-13 20:44:58

sabina
DF Members
Name: Sabina George
Registered: 2017-02-10
Posts: 82

Re: Tipula

Thank you John, is there an online key on this site for both Tipula? I tried the Search and got Key to Families but not for either species. Am not very familiar with using this site.

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#4 2018-11-14 01:43:46

KenMerrifield
Administrator
Name: Ken Merrifield
Registered: 2008-02-21
Posts: 260

Re: Tipula

Test keys (intended for the impending Cranefly book) can be downloaded from the Catalogue of the Craneflies of the World web site maintained by Pjotr Oosterbroek, Amsterdam. https://ccw.naturalis.nl/
Click on 'Literature' on the menu and enter "Stubbs Kramer" in the author field and the search result list should include-
"Stubbs, A.E.; Kramer. J. 2016d. Key to the subgenera and species of Tipula, by Alan Stubbs, 1996, revised by John Kramer, 2016. Published by the authors as PDF (29 pages); date of latest version: 17 February 2018."  Page 24 has the Tipula ss key that you need.
I think that other than the separation of females of oleracia and paludosa on wing length relative to the abdomen (potentially complicated by the possibility of the rare subcunctans in late autumn) you may have to catch the specimen and take macro mode pictures of the underside of the head and the antennae for a reliable identification.
HTH

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#5 2018-11-17 23:45:52

sabina
DF Members
Name: Sabina George
Registered: 2017-02-10
Posts: 82

Re: Tipula

Thank you, much appreciated. Just found the site, much to explore. Will try getting specimens next season.

Last edited by sabina (2018-11-17 23:49:05)

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