Worksheet 2-3/4:Bilateria
(This WS is for the next 2 sessions!)
Supplemental Instruction
Iowa State University / Leader: / Kelly
Course: / Biol 211 (1)
Instructor: / Roe
Date: / 02/4/15 and 02/ 8/15

Review:

Depict the three coelom types: How many tissues are necessary to have any of these?

Parasite Lifecycle:

Animal Phylogeny:

Lophotrochozoa: What does this tell you?

Symmetry______

Tissue Layers______

Coelom Y or N______include specifics in phyla below..

Blastopore fate______

Phyla: What do they all have? / Classes: / What is special?
1. Platyhelminthes:
2.
3.
4.
5.

Ecdysozoa:

Ecdysozoans: What does this tell you?

Symmetry______

Tissue Layers______

Coelom Y or N______include specifics in phyla below..

Blastopore fate______

Nematoda:

Commonly known as: / What is special:

Arthropoda:

Classes:
Commonly known as:
Special things:
Habitat:
# of Regions:
Legs and antennae:

What are the four characteristics of Arthropod Success? Importance?

Deuterostome: What does this mean?

3 Subphyla: / Cephalochordates / Urochordates / Vertebrates
Examples and Anything Special:

Which two subphyla include craniates?

What 4 characteristics of chordates (Circle this clade)? What are their functions?

Vertebrata: What are the four characteristics special to vertebrates?

Define: Why are all of these significant? How did these characteristics come about?

Gnathostomes-

Tetrapoda-

Amniotes-

What are some special characteristics of mammals?

I thought this was a helpful Summary:

Phylum Chordata

1. Deuterostomes (like the echinoderms)

2. All share four features:

•Notochord supports body

•Nervous system develops from dorsal nerve cord

•Embryos have pharynx with slits

•Embryos have tail that extends past anus

Three Subphyla

Two invertebrate subphyla

1. Urochordata (tunicates)

2. Cephalochordata (lancelets) Everything here and below is a craniate

3. Vertebrata (the vertebrates)

-Have backbone of cartilage or bone

-Brain is encased in protective skull

Eight Vertebrate Classes

1. Agnatha - jawless fishes Ex. Lampreys

2. Placodermi - jawed armored fishes (extinct) Everything here and below is a Gnathostome

3. Chondrichthyes - cartilaginous fishes Sharks

4. Osteichthyes - bony fishes (We talked about Actinopterygii, Actinistia, and Dipnoi)

5. Amphibia - Amphibians Everything here and below is a tetrapod

6. Reptilia - Reptiles Everything here and below is an amniote

7. Aves - Birds

8. Mammalia - Mammal