Flashcards in Week Four: Phylum Acanthocephala (Chapter 9) Deck (11):
What are acanthocephalans?
Who do acanthocephalans mostly parasitize?
Marine and freshwater fish
What is the thorny headed worm of swine?
What is the thorny headed worm of dogs?
What are some morphologic features of acanthocephalans?
Elongate, cylindric, tapering at both ends, dioecious (females are larger than males)
What are the hook things on an acanthocephalans head called?
Proboscis (retractable proboscis)
What are acanthocephalans organ of attachment?
How do acanthocephalans absorb nutrients?
Explain the life cycle of acanthocephalans
-Eggs voided in feces of definitive host
-Intermediate host ingests the egg
-Larva hatches in intermediate host
-Larva develops into acathella, then cystacanth
-Definitive host ingests arthropod intermediate host
-Attaches to wall of small intestine
Host, location of adult, intermediate host, transmission route, common name
Location: small intestinal mucosa
I. Host: Dung beetle
TR: Ingestion of infective dung beetle
CN: Thorny headed worm