Fig. 5

Micrographs of somatic structures of field-collected Macrostomum crassum. Brackets denote accessions of deposited specimens, with MTP LS 2644 being the HOLOTYPE. a Overview of an adult slightly squeezed worm (MTP LS 2521). b Eyes and neuropile (MTP LS 2644). c Dense rhabdites on the dorsal side of the rostrum (MTP LS 2644). d Detail of eye and rhammite glands (MTP LS 2521). e Caudal region with long sensory cilia (MTP LS 2644). f Tail plate with several rows of adhesive organs (MTP LS 2521). Scale bars indicate 200 μm in (a) and 20 μm in (b–f)