Phylum Annelida

What is a Lophophore

A feeding structure made of ciliated tentacles that surround the mouth 

Phylum Annelida Basic Characteristics

• Coelomate, Lophotrochozoans

• Complete Gut w/ paired nephridia (excretion)

• Closed Circulatory System

Asexual and Sexual Reproduction

• Asexual - fission & fragmentation

• Sexual - Monecious sexual reproduction

2 Major Clades

• Errantia: Motile polychaete worms

• Sedentaria: Smooth worms/leeches

What are Polychaetes?

Segmented worms that live in marine habitats

• Have bristles/parapodia

Subgroup Errantia Basic Charactheristics

• Diecious

• Have NO Clitellum

• Many are Euryhaline (tolerate salinity)

• Prostomium (mouth)

Subgroup Serdentia worms

Subgroup Clitella includes

• Lumbricidae

• Hirudinea

Lumbricidae

Earthworms and Blackworms

• Oligocheates

• Terestrail and Freshwater

• Have Clitellum

Hirudinea

Leeches

• Anterior and Posterior suckers

• Hermaphroditic

• Put anesthetic and anticoagulants in their prey

Phylum Sipuncula

Peanut Worms

• Proboscis for feeding (introvert)