Figure 19. Heterolepidoderma macrops. A in A Heterolepidoderma and Halichaetoderma gen. nov. (Gastrotricha: Chaetonotidae) riddle: integrative taxonomy and phylogeny of six new freshwater species from Central Europe

Figure 19. Heterolepidoderma macrops. A, dorsal overview showing the keel pattern. The body is about 120 µm long and has a slender tenpinshaped silhouette, with a clearly defined head region, a narrowing neck, and a bulbous trunk. The furcal indentation is narrowly helmet-like in shape. The furca branches bear well-developed adhesive tubes. B, head dorsal scales are keeled and oblong. C, mouth and under-mouth region. D, sensory bristle arises from a bulbous papilla. E, trunk dorsal scales are keeled and oblong. F, upper-furcal scales are keeled, oblong, and roughly hexagonal with all edges rounded. G, furca appendage ventral scales are keeled and oblong with a truncated posterior end. H, furca base dorsal scales are relatively large and oval. ceph, cephalion; ct, cuticular teeth; hs, hypostomium; rr, rod-like reinforcements. Scale bar = 50 µm.