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I haven't seen X. triangularis myself, but the photos in https://observati...0/photos/? look rather different - e.g., there are no conspicuous yellow spots on the abdomen and the hind tibiae are much paler. Could this male not belong to X. abiens? Among the species with 4 yellow spots it is the one with the darkest hind tibiae, as I read in https://www.flick...477168354/. However, we need experts' opinion!
Regards, Sundew