Phylum Annelida

Habitat

all

-will be anywhere where there is enough moisture to keep them wet

Characteristics

coelomate/protostome line

Symmetry

bilateral

Metameric

repeated segments separated by septa

Setae

“structural hairs”

projections from body that help move and grip things for movement

Digestion

complete tract, mouth-anus

Respiration

skin, gills, parapodia

Circulation

closed, 5 hears

Nitrogen Wate

excreted through nephridia

Nervous System

brain and ventral cord

Reproduction

sexual

asexual

Dioecious

either male or female

Parthenogenesis

reproduction without fertilization

Class Polychaeta

bobbit worms

70% of most annelids

“many bristles”

Hydrothermal Vent

heated water fissure in the ocean

Cold Seeps

cold locations on the sea floor

Whale Fall

when a whales dead body sinks to the ocean floor creating an ecosystem where organisms can live for a while

Clas Citella

earthworms, ice worms

-move fluid in and out to different compartments

Subclass Hirudinea

leeches

-lack setae

Ectoparasites

blood feeders

Hindurin

anticoagulant

Phylum Spincula

peanut worms

-unsegmented

Class Echiura

spoon worms

“Punish Fish”

Bilaterata

animals with bilateral symmetry

Metazoan

multicellular animals

Eumetazoan

animals with true tissues

Lophotrochozoa

mollusks and annelids

Ecdysozoa

shedding animals