Fig. 1. Diagrammatic drawings of synlophe patterns in the region of the esophagus of Ostertagiinae. ex. excretory pore; cp, cervical papilla; EI, esophageal-intestinal junction; D, dorsal; S, subventral or subdorsal; L, lateral; V, ventral. Ridges shown as dashed lines, for emphasis, are continuous like adjacent ridges. (a) Ostertagia hisonis, lateral view, showing single lateral ridge and tapering adjacent synlophe (redrawn from Lichtenfels, et al., 1991). (b) Ostertagia mossi, lateral view, showing three parallel lateral ridges and parallel adjacent synlophe (redrawn from Hoberg et al., 1993). (c) Ostertagia gruehneri, lateral view, showing five parallel lateral ridges and parallel adjacent synlophe (redrawn from Lichtenfels, et al., 1990). (d) Mazamastrongylus odocoilei, ventral view, showing hood-like pattern around excretory pore and angled ridges extending from ventral ridge to lateral ridge (redrawn from Lichtenfels, et al., 1993). (Lichtenfels & Hoberg, 1993, Vet. Parasitol. 46: 33-53)
