part_of adult capitulum adult Hypostome Fig. 4-1, Fig. 4-2, Fig. 4-13, Fig. 4-14, Fig. 4-16, Fig. 7-1, Fig. 7-3, in Biology of Ticks ISBN:0-19-505910-7. TADS:0000009 TADS:0000009 The hypostome is an unpaired, elongated projection from the basis capituli that is inserted into the skin when the tick feeds. The hypostome contains recurved denticles (teeth) on ventral surface and a narrow channel, the food canal (= hypostomal gutter) on itsdorsal surface. default_namespace