Diptera.info :: Identification queries :: Diptera (adults)
 Terellia plagiata?
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| thekor |
Posted on 05-02-2026 22:35
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Member Location: Posts: 3 Joined: 22.01.26 |
Hi, I’d be grateful if someone could help me with this Terellia observed in a dry coastal meadow in Oslo, Norway, mid June 2025. The pictures I took aren’t great, so there’s a lot of details missing, but I'll give it a shot anyway. Terellia ceratocena and T. plagiata are the only Cerajocera with enlarged male pedicels that are known from Norway and Sweden. As far as I can see, the discal and subbasal bands are too weakly defined for ceratocena, leaving me with plagiata. However, the key I used (Yaran et al., 2018) described a new species in the subgenus: T. akguli, which is similar to plagiata. There are no reported occurrences of akguli in the GBIF database, so I have no idea if it has been found outside of Eastern Türkiye. According to the key, the apical and subapical bands are always separated in plagiata, and fused in akguli. BUT it also states that the subapical and discal bands should be conjoined or fairly close together in akguli, which is not the case here? Are wing pattern characteristics even enough to distinguish the two? The key only covers the Turkish species in the subgenus. Are there any other candidates not included in the key? Or another key I could use instead? I tried (White, 1988) first, which seems to be dated. Link to Yaran et al.: https://www.researchgate.net/publication/328897372_A_new_species_and_additional_record_of_Terellia_Robineau-Desvoidy_Diptera_Tephritidae_from_Turkey_with_a_key_for_the_Cerajocera_group thekor attached the following image:  [266.51Kb] Edited by thekor on 05-02-2026 22:36 |
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| Nosferatumyia |
Posted on 06-02-2026 00:10
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 Member Location: Posts: 3559 Joined: 28.12.07 |
1. Do not read junk literature. 2. We are preparing a detailed revision of the sg. Cerajocera, incl. the Middle Eastern species with DNA, right now. 3. As I can see on the picture, the costal cell is hyaline. => plagiata. Both ceratocera and plagiata occur in Northern Europe. (1. Do not read junk literature!) Edited by Nosferatumyia on 06-02-2026 00:10 Val |
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| thekor |
Posted on 06-02-2026 13:53
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Member Location: Posts: 3 Joined: 22.01.26 |
Thank you for the reply. I suspected the quality of the article was questionable, hence the post here. 1. Where will the revision be published? 2. Are there any publication(s) you recommend looking into until then? 3. Any tips on how I can filter out junk literature on niche topics? |
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| Nosferatumyia |
Posted on 07-02-2026 04:09
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Member Location: Posts: 3559 Joined: 28.12.07 |
The only sound key to European Fauna of Tephritidae is Merz (1994), Fauna Helvetica. I have added very few nomenclature corrections since then. Just accept my expert opinion. No other tips. Consider quality of ilustrations, descriptions and geographic coverage. We are going to publish Cerajocera revision in the European Journal of Taxonomy or Zootaxa. Edited by Nosferatumyia on 07-02-2026 04:10 Val |
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| thekor |
Posted on 07-02-2026 18:05
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Member Location: Posts: 3 Joined: 22.01.26 |
Thanks again! Wasn't doubting your ID, just curious what literature I should have used instead. I'll use Merz moving forward, and keep an eye out for the revision. Should I change the post title now that the fly has been IDed? |
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