Bio 1134 Lab Practical 2: Animals pt 1

What are the key characteristics of the Phylum Porifera?

1) No organs or tissues
2) No apparent symmetry
3) 3 functional layers in "vase" organization
4) Built with loosely organized assemblage of several types of interacting tissues

Name an organism from the Phylum Porifera

Ocean Sponge

What are the key characteristics of the Phylum Mollusca?

1) Unsegmented
2) Bilateral symmetry
3) Share four common features: foot, visceral mass, radula, and dorsal mantle

Name three classes under the Phylum Mollusca

1) Cephalopoda
2) Gastropoda
3) Bivalvia

What are the key characteristics of the Phylum Cnidaria?

1) Diplomatic body
2) Only two embryonic tissue layers
3) Single opening leading to gastrovascular cavity
4) Lives in both fresh water and salt water
5) Radial symmetry

Name an organism from the Phylum Cnidaria

Jellyfish

What are the key characteristics of the Class Cephalopoda?

1) Most complex brain of any invertebrate
2) Head and foot are merged and surrounded by a ring of tentacles

Name two organisms from the Class Cephalopoda

Squids and Octopuses

What is the key characteristic of the Class Gastropoda?

1) Single spiraled shell in which the head and foot can be withdrawn

(slugs, nudibranchs, and see hares have lost this shell)

Name two organisms from the Class Gastropoda

Snails and Slugs

What is the key characteristic of the Class Bivalvia?

1) Has two shells that surround the body and are joined at the back

Name two organisms from the Class Bivalvia

Clams and Mussels

What are key characteristics of the Phylum Arthropoda

1) Highly segmented
2) Obvious exoskeleton
3) Open circulatory system
4) Sets of jointed appendages

Name four classes under the Phylum Arthropoda

1) Chelicerata
2) Myriapoda
3) Hexapoda
4) Crustacea

What are the key characteristics of the Class Chelicerata?

1) Typically has eight legs
2) Has appendages called chelicerae that have modifications for feeding or to deliver venom

Name two organisms from the Class Chelicerata

Spiders and Horseshoe Crabs

What is the key characteristic of the Class Myriapoda?

1) Has many body segments with either one or two legs per segment

Name two organisms from the Class Myriapoda

Centipedes and Millipedes

What is the key characteristic of the Class Hexapoda?

1) Six legs on the thorax (Some have evolved flight)

What organisms come from the class Hexapoda?

Insects

What are the key characteristics of the Class Crustacea?

1) Biramous appendages
2) Primarily aquatic

Name two organisms from the Class Crustacea

Lobsters and Shrimp

What are the key characteristics of the Phylum Chordata?

1) Bilateral symmetry
2) Segmented
3) Closed circulatory system
4) Share four common features: dorsal hollow nerve cord, notochord, pharyngeal slits, and post-anal tail

Name three subphylum under the Phylum Chordata

1) Tunicata
2) Cephalochordata
3) Craniata/Vertebrata

What are the key characteristics of the Subphylum Tunicata?

1) Larvae appear "chordate-like"
2) Has a notochord
3) Adults have soft gelatinous bodies and two siphons used to filter the water column

Name two organisms from the Subphylum Tunicata

Sea Squirts and Sea Salps

What are the key characteristics of the Subphylum Cephalochordata?

1) Has a notochord
2) Has a dorsal hollow nerve cord
3) Pharyngeal Gill Slits'

What are the key characteristics of the Subphylum Craniata/Vertebrata?

1) Possesses either a cranium or vertebrae
2) Has a central nervous system
3) Has dorsal hollow nerve cord
4) Has notochord

What superclass is under the Subphylum Craniata/Vertebrata?

1) Agnatha

What is the key characteristic of the Superclass Agnatha?

1) Jawless Vertebrates

What classes are under the Superclass Agnatha?

1) Myxini
2) Petromyzontida

What are the key characteristics of the Class Myxini?

1) Partial cranium
2) No vertebrae
3) Secretes slime

Name an organism from the Class Myxini

Hagfish

What are the key characteristics of the Class Petromyzontida?

1) No vertebrae
2) Has notochord

Name an organism from the Class Petromyzontida

Lamprey

Name an Infraphylum under the Subphylum Craniata/Vertebrata

Gnathostomata

What is the key characteristic of the Infraphylum Gnathostomata?

1) Jawed Vertebrates

Name one class under the Infraphylum Gnathostomata

1) Chondrichthyes

What is the key characteristic of the Class Chondrichthyes?

1) Skeleton primarily composed of cartilage

Name two organisms from the Class Chondrichthyes

Sharks and Rays

Name two superclasses under the Infraphylum Gnathostomata

1) Osteichthyes
2) Tetrapoda

What is the key characteristic of the Superclass Osteichthyes?

1) They are bony fish

Name two classes under the Superclass Osteichthyes

1) Actinopterygii
2) Sarcpterygii

What is the key characteristic of the Class Actinopterygii?

1) Ray-finned fish

Name two organisms from the Class Actinopterygii

Anglerfish and Catfish

What is the key characteristic of the Class Sarcpterygii?

1) Lobe-finned fish

Name two organisms from the Class Sarcpterygii

Lungfish and Coelacanth

Name an organism from the Subphylum Cephalochordata

Lancelets