ANIMAL PARASITOLOGY LAB. BIOL 4426L

                                                     LAB. #9

                                             Flatworms (continued)

 

Phylum Platyhelminthes

         Class Cestoidea  (Text pages 297-323)

                  Order Cyclophyllidea

                           Family Hymenolepididae

 

 Vampirolepis (Hymenolepis) nana

 

Slide:  whole worm

 

         Draw: Enlargement of Scolex

 

-       What attachment organs are present on the scolex?

-       How do these differ from those on Hymenolepis diminuta?

 

-       What is the size of this worm compared to Hymenolepis diminuta?

 

Slide:  eggs

 

         -  Find the polar filaments between the membranes of this egg.

 

 

Hymenolepis diminuta - –(Text pages 342-343)

 

Slide: whole worm

 

         Draw: Scolex

 

         -   What attachment organs are present on the scolex?

-    How do these differ from those on Vampirolepis nana?

 

Slide: whole worm or typical segments

 

         Draw: proglottids

 

-       Locate the testes, ovary, vitellarium and genital opening

-       How many testes are present?

-       What is the size of this worm compared to Vampirolepis nana?

 

Slide:  eggs

 

-       Can you see polar filament in this egg?

-       How are these and Vampirolepis nana eggs different from other cestode eggs?

 

 

 

Phylum Platyhelminthes

         Class Cestoidea  (Text pages 297-323)

                  Order Cyclophyllidea

                           Family Dilepididae  (Text pages 343-344)

 

Dipylidiun caninum ––(Text pages 343-344)

 

 

Slide: Scolex

 

-       Locate and identify the attachment organs on this worm

-       Note the shape of the scolex

-        

Slide: typical segments

 

         Draw: Immature  proglottids

 

-       Note the shape of the proglottid

-       Locate the genital pores, vagina and ovaries, testes and vas deferens

                 

         Draw: Mature  proglottids

 

-       Find the egg balls inside the segment

-       Can you see any other internal organs?

 

Alternate slide – composite of scolex, immature and mature segments(proglottids)

 

Slide:  eggs and egg balls

 

-       What structures can you see inside the eggs?

-       How many eggs are packed together in the egg balls?

 

 

Phylum Platyhelminthes

         Class Cestoidea  (Text pages 297-323)

                  Order Cyclophyllidea

                           Family Anoplocephalidae  (Text pages 344-345)

 

Moniezia expansa - (Text pages 344-345)

 

Slide: Scolex

 

-       Locate and identify the attachment organs on this worm

-       Note the shape of the scolex

-        

Slide: proglottids

 

-       Note the shape of the proglottid

-       Locate the genital pores, vagina and ovaries, testes and vas deferens

-       Locate the interproglottid glands at the posterior border of each segment

-       How does this proglottid compare with that of Dipylidium caninum?

                 

 

Slide:  eggs

 

-       What is the shape of the eggs?

-       Can you see embryonic hooks inside the eggs?

 

 

Make sure you can identify and distinguish the following cestode eggs

 

Diphyllobothrium sp.

Taenia sp.

Vampirolepis nana

Hymenolepis diminuta

Moniezia expansa