Diptera.info :: Identification queries :: Diptera (adults)
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 Pherbellia albicarpa (Rond.)
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| David Gibbs |
Posted on 13-04-2011 17:47
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 Member Location: Bristol, UK Posts: 833 Joined: 17.06.06 |
Attached is photo of genitalia of a Pherbellia from Mallorca. Of the species i know have already recorded from the island i can rule out all but P. pallidicarpa. Using Rozkosny 1984 FES this specimen runs to alpina, ie mesopleuron bare, mid frontal stripe long and tapering and katepisternum with hairs only, no setae. David Gibbs attached the following image:  [37.06Kb] Edited by David Gibbs on 14-04-2011 19:15 |
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| Paul Beuk |
Posted on 14-04-2011 11:39
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 Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
Based on Roskosny's Palaeartcic review I can rule out pallidicarpa, too. The key in that book differs from the FES key so I cannot get anywhere with a pictuer of the actual specimen.
Paul - - - - Paul Beuk on https://diptera.info |
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| David Gibbs |
Posted on 14-04-2011 14:49
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Member Location: Bristol, UK Posts: 833 Joined: 17.06.06 |
Thank you Paul for having a go, Unfortunately I have been unable to get hold of Rozkosny's review. I thought the very characteristic anterior gonostylus of this specimen would render it easily identifiable, but perhaps this is an undescribed species? |
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| Paul Beuk |
Posted on 14-04-2011 15:09
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Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
It is possible. I think there have been a few descriptions of Pherbellia's after the review but dunno whether these include any from that area.
Paul - - - - Paul Beuk on https://diptera.info |
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| Nikita Vikhrev |
Posted on 14-04-2011 16:49
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 Member Location: Moscow, Russia Posts: 9456 Joined: 24.05.05 |
I have 2 speciemens of Ph. alpina, it is uncommon species and may be collected high in the mountain or far at North, it may be not regarded as possible species for Mallorca.
Nikita Vikhrev - Zool Museum of Moscow University |
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| Paul Beuk |
Posted on 14-04-2011 17:33
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Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
The gonostyli have pointed narrow hook-like extensions neat the base, which are not directed towards the tip. Pherbellia alpina does not have these extensions, according to the figures in Rozkosny's 1991 key. The illustration in that key for albicarpa has a closer resemblance but Rozkosny's figure shows two shorter extensions... Rozkosny, R., 1991. A key to the Palaearctic species of Pherbellia Robineau-Desvoidy, with descriptions of three new species (Diptera, Sciomyzidae). - Acta Entomologica Bohemoslovaca 88: 391-406. Paul - - - - Paul Beuk on https://diptera.info |
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| David Gibbs |
Posted on 14-04-2011 17:57
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Member Location: Bristol, UK Posts: 833 Joined: 17.06.06 |
The suggestion of P. albicarpa is interesting as my specimens have distinctly whitish front basitarsi. My photo shows the shape of the anterior part of the gonostylus well, there is just a single, long, posteriorly directed hook on the inner margin of the anterior part of the gonostylus. |
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| Paul Beuk |
Posted on 14-04-2011 18:22
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Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
Interestingly enough, I just checked the key and it states "anterior part of the gonostylus with 1-2 pointed processes at base".
Paul - - - - Paul Beuk on https://diptera.info |
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| Stephane Lebrun |
Posted on 14-04-2011 19:13
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 Member Location: Le Havre, France Posts: 8248 Joined: 03.03.07 |
In Vala and in Rivosecchi's books, the more approaching genitalia is also P. albicarpa one, though not exactly similar, and always represented with a double thooth-like process instead the single long one on gs. I don't know if it can help but Vala says : "Gonostyle antérieur courbé en forme de C, avec une structure lamellaire à 2 pointes à la base, l'extrémité distale couverte de fines soies" Rivosecchi says about the same thing : "La porzione anteriore dei gonostili è invece assottigliata distalmente, ricurva e con due grossi denti al margine interno." , and describes the posterior part of gs as being characteristic by its globose-subtriangular shape and provided with robust black spines in the postero-internal part.
Stephane. |
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| David Gibbs |
Posted on 14-04-2011 19:14
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Member Location: Bristol, UK Posts: 833 Joined: 17.06.06 |
Nikita has kindly sent me a copy of the key and they run nicely to P. albicarpa, so unless someone knows of a closely similar species, i think that is them identified thanks for your help |
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