MINOR WORM PHYLA

Question 1

Proboscis and inkeeper worm

Answer 1

ECHIURA

Question 2

Two distinct body parts of the phylum Echiura?

Answer 2

Trunk

Large flap-like proboscis

Question 3

How is the phylum Echiura linked to the annelids?

Answer 3

1. Paired setae in setal sacs

2. Highly segmented nervous system in late larvae & early juveniles

Question 4

Beard worms and Vestimentifera

Answer 4

POGONOPHORA

Question 5

Habitat of the phylum Pogonophora?

Answer 5

Hydrothermal vent communities

Question 6

Three body regions of the phylum pogonophora?

Answer 6

1. Forepart
2. Trunk
3. Opisthosoma

Question 7

How does the phylum Pogonophora digest their food if they lack a gut?

Answer 7

Possess symbiotic bacteria in tentacles or in internal trophosome

Question 8

What is a trophosome?

Answer 8

Larvae of some Vestimentifera

- have a compete gut like an annelid worm

Question 9

How are the pogonophores liked with polycheate annelids?

Answer 9

Features of the opisthosoma (segfmentation, setae in setal sacs)
Trochophore-like larva
Fully segmented juvenile with setae (some)

Question 10

Phylum of the peanut worms

Answer 10

Phylum Sipuncula

Question 11

The bizarre body plans of the peanut worms include:

Answer 11

Two coeloms
Completely invertable head
Crown of tentacles surrounding the mouths
An unusual u-shaped gut
Thin, flexible cuticle