Helminthology

Question 1

Morphological features of Nematoda
(Class: Secernente)

Answer 1

1)Cervical papillae –Haemonchus spp, Oesophagostomum spp.
-2)Cervical alae – Nodular worm, Toxascaris spp.
-3)Cephalic vesicle – Cooperia spp.
-4)Excretory notch - Trichostrogylus spp.
5) Cephalic spines – Gnathostoma spp.
6)Cervical groove - Nodular worms
7) Leaf crowns - Nodular worms
8) Vulvar flap - Strongyles
- Bosses or scutes e.g. Spiruroidea
- 9) Copulatory bursa e.g. Strongyles
10) Hooks or cutting plates e.g. Hookworms

Question 2

Morphological features of Platyhelminthes

Answer 2

Usually dorsoventrally flattened e.g. Fasciola spp.
Some conical in shape e.g. Paramphistomes
Somewhat elongate cylindrical e.g. Schistosomes.
Vary from Heterophyses heterophyses about 1mm to a large
form e.g. Fasciola gigantica about 7.5cm.
Characteristically with oval, median ventral and sometimes

Question 3

Phylum: Platyhelminthes (flatworms)
Class: Trematoda (Flukes)


Answer 3

Usually dorsoventrally flattened e.g. Fasciola spp.
Some conical in shape e.g. Paramphistomes
Somewhat elongate cylindrical e.g. Schistosomes.
Vary from Heterophyses heterophyses about 1mm to a large
form e.g. Fasciola gigantica about 7.5cm.
Characteristically with oval, median ventral and sometimes