Week 5 Flashcards
1
Q
What groups make up Lophotrochozoa?
A
Mollusca, Nemertea, Annelida, Phoronida, Bryozoa, Branchiopoda
2
Q
Lophotrochozoa apomorphies
A
- 4 bundles simple chaeate per segment
- chaetae made of b-chitin
3
Q
3 main groups of annelids
A
Polychaeta, oligochaeta (earthworms), hirudinea (leeches)
4
Q
Metameric structure
A
Pair of…
- mesodermal somites with coelomic spaces
- nephridia
- coelomoducts
- ganglia on a ventral nerve cord
- appendages
5
Q
Polyhcaeta apomorphies
A
- parapodia
- nuchal
- paired ganglia
- pair of pygidial cirri
6
Q
How many segments per “wavelength” for slow crawling locomotion?
A
6-8
7
Q
How many segments per “wavelength” or rapid crawling?
A
14
8
Q
How many segments per “wavelength” for swimming?
A
40
9
Q
Protonephridia vs metanephridia
A
Protonephridia = coelomic system
VS
Metanephridia = hemal system
