class polychaeta notes

Phylum: AnnelidaPhylum: AnnelidaClass: PolychaetaClass: Polychaeta

By Mr. “I have hair” ChapmanBy Mr. “I have hair” Chapman

Class: PolychaetaClass: Polychaeta PolyPoly

– manymany ChaiteChaite

– hairhair Many hair animalsMany hair animals

Class: PolychaetaClass: Polychaeta Live in a variety of Live in a variety of

habitatshabitats– Ocean floorOcean floor– Under rocks and Under rocks and

shellsshells– Crevices of coral Crevices of coral

reefsreefs

Polychaeta DigestionPolychaeta Digestion Free swimming polychaetes are Free swimming polychaetes are

predators, scavenger, and filter predators, scavenger, and filter feeders.feeders.

AnnelidsAnnelids Earthworms and polychaetes have Earthworms and polychaetes have

appendages growing from each of appendages growing from each of the annuli called the annuli called

SetaeSetae

PolychaetesPolychaetes On some On some

polychaetes the polychaetes the (setae) are longer (setae) are longer and are called and are called parapodiaparapodia and are and are used as paddles.used as paddles.

Parapodia are their Parapodia are their most distinctive most distinctive featurefeature

PolychaetesPolychaetes Tube worms are an example of marine Tube worms are an example of marine

species that do not have paddle-like species that do not have paddle-like appendages. appendages.

PolychaetesPolychaetes Another example are Feather DustersAnother example are Feather Dusters

PolychaetesPolychaetes Another example are Christmas Tree WormsAnother example are Christmas Tree Worms

PolychaetesPolychaetes They burrow into the bottom as They burrow into the bottom as

larvae, but as they grow, they make larvae, but as they grow, they make a tube, which serves as a burrow. a tube, which serves as a burrow.

PolychaetesPolychaetes However the tube However the tube

is above the sea is above the sea floor.floor.

They have setae to They have setae to hold themselves in hold themselves in their tube. their tube.

Tube WormsTube Worms Tube is made of Tube is made of

sand, gravel and sand, gravel and bits of shells that bits of shells that stick to the worm’s stick to the worm’s slime. It all slime. It all becomes tough becomes tough and leathery. and leathery.

Tube WormsTube Worms Feathery gills Feathery gills

surround the surround the mouth. mouth.

They form a funnel-They form a funnel-shaped fan shaped fan covered with cilia covered with cilia called Radiolescalled Radioles

Tube WormsTube Worms This creates a This creates a

feeding current feeding current that draws in food.that draws in food.

Food is anything Food is anything that is organic and that is organic and digestable. digestable.