in vivo;Left ventrolateral view

Description:

Trachelius ovum (EHRENBERG,1831)EHRENBERG,1838.Left ventrolateral view showing the pellicular groove or fossa (yellow arrowhead). The function of this structure is unknown but some speculate that it may be a site of cell adherence to the substratum. The circular cytostome (red arrowhead) is located at the base of the anterior snout. The circumoral and perioral kineties (light blue arrowhead) encircle the cytostome and converge to parallel each other along the ventral surface of the snout terminating at its tip.Several of the numerous small contractile vacuoles, each with a solitary excretory pore are indicated by the green arrowheads.DIC.