Biology 625
ANIMAL PARASITOLOGY
Fall semester lecture note outline

Updated: 24 September 1999

1. Subclass: Gyrocotylidea (you will not need to learn this taxon)
   1. Monozoic
   2. Anterior end with small, inversible holdfast organ
   3. Posterior end frilled, consisting as rosette-like organ
   4. Margins may be frilled (Gyrocotyle) or unfrilled (Gyrocotyloides)
   5. Ovary posterior
   6. Uterus with extensive lateral loops; terminates in midventral pore in anterior one-half of the worm
   7. Testes anterior
   8. All parasites of spiral valve of Holocephali (ratfish; chimaera); few species (i.e. Gyrocotyle fimbriata in the intestine of ratfish
   9. Larva with 10 equal-sized hooks (decacanth larva)

2. Subclass: Cestoidea
   1. Superorder: Amphilinidea (you will not need to learn this taxon)
      1. Monozoic
      2. Dorso-ventrally flattened
      3. Indistinct proboscis-like holdfast at anterior end
      4. Genital pore anterior; Ovary posterior; testes preovarian
      5. Vitelline follicles bilateral
      6. Uterus N-shaped or looped
      7. Oncosphere (larva) with 6 large and 4 small hooks
      8. Parasitic in body cavity of primitive fish and turtles; few species (some representatives below)
         1. Amphilina bipunctata in body cavity of sturgeon in Oregon
         2. Austramphilina elongata in body cavity of tortoises in Australia
   2. Superorder: Eucestoda
      1. Adults polyzoic in most groups
      2. Hooks on larva reduced to 6 (hexacanth)
      3. Tegument covered by microtrichs
      4. Two Infracohorts and 12-14 orders, depending upon the author
         1. Infracohort: Pseudophylla
            1. Caryophyllidea
            2. Spathebothriidea
            3. Pseudophyllidea
         2. Infracohort: Saccouterina
            1. Nippotaeniidea
            2. Lecanicephalidea
            3. Aporidea
            4. Diphyllidea
            5. Litobothridea
            6. Trypanorhyncha
            7. Tetraphyllidea
            8. Proteocephalata
            9. Cyclophyllidea