Figure 18 in A Heterolepidoderma and Halichaetoderma gen. nov. (Gastrotricha: Chaetonotidae) riddle: integrative taxonomy and phylogeny of six new freshwater species from Central Europe

Figure 18. Heterolepidoderma striatum sp. nov. A, overview showing the internal morphology. B, detail of the anterior body region, showing the pharynx and the pharyngeal–intestinal junction. Note that the hypopleurae are only very indistinctly marked in the head outline. C, detail of the posterior body region, showing the narrowly oblong scales, sensory bristle scales (white arrowheads), as well as the paired roughly rectangular and multi-keeled scales at the furca base. These peculiar scales represent a morphological autapomorphy of He. striatum, reliably differentiating it from all congeners. D, the posterior region of the ventral interciliary field is covered by narrowly oblong scales and a pair of broadly oblong scales. E, the furca indentation is broadly U-shaped. at, adhesive tubes; ceph, cephalion; epi, epipleurae; das, differentiated anterior section of intestine; hyp, hypopleurae; m, mouth; pij, pharyngeal–intestinal junction. Scale bars = 5 µm (C, D, E), 15 µm (B), 30 µm (A).