(Back to Canine Diagnostic Key)

1. Elongate Cylindrical Worm (Nematode or Acanthocephalan).
                                                                    .......... Go to: 3, 4, & 5
2. Flat Segment (Tapeworm Proglottid).       .......... Go to: 6 & 7


3. Anterior end squared-off with cuticular collar.
                                                                  .......... Physaloptera sp.
4. Anterior end rounded-off with 3 fleshy lips
                                                                    ........ Toxocara canis
5. Anterior end with a spiny proboscis.
                                          .......... Macracanthorhynchus ingens


6. Oval segment with 2 lateral genital pores and egg packets released on proglottid squash.                             ........ Dipylidium caninum
7. Rectangular segment with 1 lateral genital pore and single spherical eggs released on proglottid squash.       ........ Taenia pisiformis