Marine Biology - Arhropod

Name characteristics of the Phylum Arthropoda

Jointed legs, exoskeleton, ecdysis (molting), segmented body, bilateral symmetry, dioecious, sexual external fertilization, open circulatory system.

Examples of Hexapoda

Grasshopper, butterfly, beetle, bee, moth, ant

Examples of Myriapoda

Centipede and Millipede

Examples of Crustaceans

Crab, Lobster, Shrimp, Barnacle

Examples of Chelicerates

Spider, Scorpion, Tick, Mite

Define Molting

Shedding exoskeleton

Define Dioecious

Having separate male & female

Define Carapace

Hard, protective covering

Define Cheliped

A large claw used by crustaceans

Define Maxilliped

Used for feeding

Define Pereopod

Used for walking

Define Pleopod

Used for swimming

Define Uropod

Used for locomotion

Define Chitin

Tough, flexible, makes-up exoskeleton

Define Decapod

Crustacean with 10 legs

Define Cephalothorax

Head and Thorax fused together

Define Mandibles

Jaws used for crunching and grinding

Define Rostrum

Long, Spiky projection of the carapace

What types of eyes do arthropods have

Compound (image forming) or Simple (detect movement)

What is the difference between American Lobsters and Spiny Lobsters

American are solitary with 2 large claws living in cold NE waters. Spiny Lobsters are social, have no claws, are covered in spines and live in warm SE waters.

How can you tell the difference between a male and female crab?

Males have triangular abdomens and Females have round abdomens

Describe the appearance of Copepods

Small, Planktonic, Transparent, Single Eye, Benthic

Describe the appearance of Barnacles

Heavy, hard calcareous shell, use cirri, feathery structures to filter feed

Describe the appearance of Amphipods

Laterally compressed, greater than 2cm, curved body

Describe the appearance of Isopods

Bigger than 2cm, flattened dorsoventrally, giant isopod

“Living Fossil”

Horseshoe Crab

Crustacean that uses sessile organisms as camo

Decorator crab

Related to ticks and spiders

Horseshoe crab

Food for baleen whales

Krill

Small, laterally compressed

Amphipods

Blue Blood

Horseshoe crabMin

Mini-lobster

Crayfish

Roly-poly, pill bug

Wood Louse

Attaches to whales ,sea turtles, manatees

Barnacles

Crustacean that eats and becomes the tongue of other organisms

Parasitic fish louse isopod