It appears I am not good in taking photos with a microscope (too small depth of focus), but maybe it is possible to say something about this pair. Left specimen 12 mm, right 14 mm.
Thank you, Jérôme! This is a big step forward. I'll try to look around this species. Thanks also to Claude for great Photoshoping. I was not able to improve the image that much, reflections are the trouble makers.