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14 Cards in this Set

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Describe Class Turbellaria
mostly freeliving, commensal or parasitic to equinoderms and mulluscs, aqueous life stage
List the 3 Turbellarians discussed
Planaria
Bdellouira canadia
Synedesmus
List characteristics of planaria
has pharynx, freeliving (looks like bell that's smoking)
Describe Bdellouira candida
leaf-like, pharynx, adhesive sucker on bottom

-Parasite of horseshoe crabs
Describe synedesmus
Two suckers at top, large mouth and pharynx

-parasite of sea urchins
What do all Turbellarians have in common?
Have aquatic phase in life cycle
Describe Monogenia
ectoparasites of fish, All parasitic, hermaphroditic
Oculotrema hippopotami
trematode in hippo eye

-only species to parasitize mammals
Explain where you will find a specific monogenia
They are VERY specific to their attachment location and only in extreme narrow niches.
Parasites will fall off when fish is under much stress
Opisthaptor
posterior sucker/attachment organ
botheria
pincher structure that allows attachment but gone when fish under stress
How do monogenia get their nutrients?
Nutrients pass through the microvilli and into the epithelium
Dactylogyrus Life cycle
eggs eliminated-->oncomiracidium is produced-->Attaches to new host--> TOP
What happens to a fish if infected with Dactylogyrus?
1. erosion of epithelium
2. Blood loss
3. Secondary infection (Bacteria common)
4. Gill irritation-mucus production-animal sufficates