cephalochordata lancelets (habitat/ adaptation)

Cephalochordata lancelets (habitat/ Adaptation)

Lancelets live in sandy bottoms

They live in shallow seawater.

They live in protected coastal beaches.

Urochordata tunicates (habitat) You can find them

deep in the water.

Facts ! Lancelets use cilia to draw water into their

pharynx through there mouth. Lancelets swim weakly. Food particles in the water are trapped as

the water passes through the numerous slits in the pharynx.

Facts (tunicates)

There bodies are covered by a tough covering or tunic.

Tunicates squirt out a stream of water when touched.

Tunicates are adapted for filter feeding. Food is filtered by the pharynx moves into

the stomach.

Chordata Characteristics They have bilateral symmetry Chordate have segmented bodies which included

segmented muscles Chordata have a well-developed coelem They have a hollow never cord that usually ends

with a brain Chordata have a post anal tail at some point in

there life They have an endoskeleton made out of either

bone or cartilage

Vocabulary Atriopore- when the food enters the intestine to

be digested while the water leaves the body Cephalochordata- a chordate subphylum defined

by the presence of a notochord that persists throughout life. It is represented in the modern oceans by the lancelets. Fossil species are also known from the Chengjiang biota.

Urochordata- are members of the subphylum Tunicata or Urochordata, a group of underwater saclike filter feeders with incurrent and excurrent siphons that is classified within the phylum Chordata.

Branchiostoma Belcheri Lancelets

Kingdom: Animalia

Phylum Chordata

Class : Cephalochordata

Family : Branchiostoma

Species: Branchiostoma belcheri

Botrylloides Tunicate

Kingdom:anamalia

Phylum:chordata

Class:ascidiacea

Order:stolidobranchia

Family:styelidae

Genus:botrylloides

Epigonichthys Cultellus

kingdom:anamalia

phylum:chordata

class:cephalochordat a

family:asymmetronidae

species:epigonichthys cultellus.

Resources

• Websites

•www.tolweb.org/Chordata/2499

•www.encyclopedia.com/topic/Chordata.aspx

•biology.clc.uc.edu/courses/bio106/chordate.htm

•animals.about.com/od/identifyinganimals/p/chordates.htm

•www.fossilmuseum.net/Tree_of_Life/PhylumChordata.htm

book

Biology book

videos

http://www.scivee.tv/node/2752

http://www.techvideobytes.com/video/1128075501