Figure 20. Heterolepidoderma macrops. A, lateral overview showing the internal morphology. The pharynx extends from c. U3 in A Heterolepidoderma and Halichaetoderma gen. nov. (Gastrotricha: Chaetonotidae) riddle: integrative taxonomy and phylogeny of six new freshwater species from Central Europe

Figure 20. Heterolepidoderma macrops. A, lateral overview showing the internal morphology. The pharynx extends from c. U3 to U27, is 35 μm long and 5.9–8.6 μm wide, and smoothly continues through the pharyngeal-intestinal junction to the differentiated anterior section (U28–U31) of the intestine, which extends from U32 to U85. B, detail of the head region showing the cephalion with a free posterior edge. The mouth ring is oval, approximately 6.9 μm in the largest diameter, and located ventroterminally at U1–U4. C, sensory bristle arises from a bulbous papilla. D, trunk dorsal scales are keeled and narrowly oblong. E, ventrolateral view of the anterior body region. Note the mouth ring and the hypopleurae. F, dorsolateral view of the posterior body region. Arrowhead denotes the relatively large and oval scale at the transition between the furca base and the furca appendages. at, adhesive tube; ceph, cephalion; hyp, hypopleura; m, mouth; s, sensory bristles; sc, sensory cilia. Scale bars = 5 µm (C, D), 10 µm (B), 15 µm (E, F), 25 µm (A).