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That is good to know, thanks. I find the terminology and synonyms a bit confusing! Only just realised squama and calypter are one and the same!

If I get the time tomorrow or the day after I will see if I can get another photo from another specimen, dorsal view, with the squama/calypter bent down. I can get a bit closer than in those photos, but not knowing quite where to look made doing so a bit pointless/difficult!