Echiurans Flashcards
1
Q
Echiurans Taxonomy
A
Annelida
2
Q
Echiurans common name
A
Spoon worms
3
Q
Echiurans defining features
A
Anal sacs
Proboscis
4
Q
Echiurans: Anal Sacs
A
Muscular organs out pocketing from rectum into coelomic space, with numerous funnels to discharge coelomic fluid and waste through anus
5
Q
Echiurans: Segmentation
A
No segmentation as adults
6
Q
Echiurans: feeding/lifestyle
A
Burrow in sand or mud
7
Q
Echiurans: Proboscis
A
Contains the brain Extended quite far Used for food collection Never retracted into body Ciliated gutter
8
Q
Echiurans: Urechis caupo
A
Makes a U shaped burrow
Moves with peristalsis
Shared with pea crab and bivalve
9
Q
Echiurans: Reproduction
A
Gonochoristic
Can be dimorphic: male and female differing in appearance
Males much smaller and lack proboscis
