Chapter 4 page 6

Question 1

Subclass Branchiura:

Answer 1

Majority of the Branchiura are ectoparasites of fish (freshwater and marine ecosystems) a few species parasites amphibians. Commonly known as fish.

Question 2

Branchiura: 4 genres. Most common genus:

Answer 2

Argulus

Question 3

**Argulus species: Not host-specific

Answer 3

Are of economic importance as parasites of farmed fish and high value cultures fish such as koi carp**.

Question 4

Female Argulus lays its eggs.

Answer 4

Fish farmers use pesticides (such as ivermectin) in order to reduce the abundance of branchiurans

Question 5

Subclass Pentastomida -

Answer 5

tongue worms

Question 6

All pentastomes are parasitic: ‘Pentastoma’ translates as

Answer 6

‘five mouths.’

Question 7

Subclass Pentastomida characteristic

Answer 7

1) adult worm = no jaw
2) 0ver 100 species (most parasitic to lungs, nasal during their adult stage)
3) **Pentastome grow referred to as ‘tongue worms’ from shape of the adult form
4) intermediate host consume eggs depending on the pentastome species

Question 8

Pentastome species examples

Answer 8

insect, fish amphibians, reptiles(unusual), mammals

Question 9

Pentastomiasis arise from infection with

Answer 9

Linguatula serrata

Question 10

Subphylum Hexapoda: contains 2 classes

Answer 10

Class Entognatha

Class Insecta

Question 11

**Class Entognatha

Answer 11

6-legged wingless organisms (have true insects), no sufficient traits needed to be included in the class insecta**.

Question 12

Class Insecta:

Answer 12

blood-feeding insects

Question 13

Hexapoda contains more than _____ species.

Answer 13

750,000 species

• largest group of metazoan animals
• Most Terrestrial organisms: some are aquatic