Living specimens were photographed with a Canon 600D Camera mounted on a Zeiss- Stemi 2000. Parafin- and semithin sections were analyzed with an Olympus microscope (BX-51). Sections were photographed with an Olympus camera (Olympus cc12) using the dot slide system (2.2 Olympus, Hamburg) and aligned using imod [58 (link)] and imod align (http://www.q-terra.de/biowelt/3drekon/guides/imod_first_aid.pdf). 3D reconstructions were performed with Fiji (1.45b) [57 (link)]/trakem [59 (link)] and Amira (5.0). Adobe (San Jose, CA, USA) Photoshop (CC) and Illustrator (CS6/CC) were used to prepare all figures.
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