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Dear Isidro
As far as I can tell this species has not been recorded from the Canary Isl. before in a paper. Also fauna Europea says it is absent. However, There may be some other species within the subfamily Telmatogetoniae involved here, which I didn't check and which I don't know It looks similar to the larvae we have here in The Netherlands and identified as T. japonicus, the most widespread species of the genus.
All the best from Amsterdam
Ton van Haaren
aka Atylotus