1. Name 5 Arthropods

Arthropods and Echinoderms 2. Without opening your book: Name two ways they are alike. Name two ways they are alike. Name three ways they are different. Name three ways they are different.

Arthropods and Mollusks 3. Without opening your book: Name two ways they are alike. Name two ways they are alike. Name three ways they are different Name three ways they are different

Phylum Arthropoda There are about 125,000,000 (one hundred, twenty-five million) species of animals on Earth. There are about 125,000,000 (one hundred, twenty-five million) species of animals on Earth. Over one million of these Over one million of these are in the Phylum Arthropoda. are in the Phylum Arthropoda. The name Arthropod means "jointed foot.“ The name Arthropod means "jointed foot.“ 4. Why are animals in this group called Arthropods? this group called Arthropods?

Characteristics of Arthropods Segmented bodies Segmented bodies Jointed appendages – Jointed appendages – legs and claws, wings, legs and claws, wings, antennae, mouth parts

Characteristics of Arthropods Bilateral Bilateral symmetry symmetry Exoskeleton Exoskeleton of jointed of jointed protective armor protective armor

Characteristics of Arthropods Compound eye – they are made up of repeating units with a lens, and visual cells. It is excellent for detecting motion. Compound eye – they are made up of repeating units with a lens, and visual cells. It is excellent for detecting motion. Found in all habitats – land, water and air Found in all habitats – land, water and air 5. Name FIVE characteristics of arthropods.

Characteristics of Arthropods Systems:  Circulatory system with gills to obtain oxygen if aquatic  Excretory system  Complete digestive system  Reproduction is sexual

3 Groups of Arthropods Insects – the most numerous Insects – the most numerous Chelicerates – horse shoe crabs, Chelicerates – horse shoe crabs, scorpions, ticks and mites Crustaceans – crabs, lobsters, crawfish and shrimp Crustaceans – crabs, lobsters, crawfish and shrimp 6. Name the 3 groups Of Arthropods and examples Of each.

Insects 3 pairs of legs 3 pairs of legs Metamorphosis Metamorphosis 3 body sections 3 body sections Most species can fly Most species can fly

Chelicerates Horse shoe crabs, Spiders, Scorpions, ticks and mites No antennae No antennae Two body sections Two body sections Feeding appendages Feeding appendages called chelicerae called chelicerae 7. Do spiders have 7. Do spiders have antennae? How do antennae? How do get their food? get their food?

Chelicerates: Horse Shoe Crab They live in coastal waters like The Gulf of Mexico. They live in coastal waters like The Gulf of Mexico. They burrow in soft mud looking for worms, clams and other mollusks. They burrow in soft mud looking for worms, clams and other mollusks. The hard carapace of the exoskeleton is shaped like a horse shoe and offers protection. The hard carapace of the exoskeleton is shaped like a horse shoe and offers protection. The pointed telson or tail is not used for defense or offense and they can be handled safely. The pointed telson or tail is not used for defense or offense and they can be handled safely. 8. Name and describe a marine chelicerate.

Crustaceans : crabs, barnacles, lobsters, crawfish and shrimp 2 pairs of antennae 2 pairs of antennae Chelipeds – claws that are chewing mouth parts Chelipeds – claws that are chewing mouth parts

Crustaceans : crabs, barnacles, lobsters, crawfish and shrimp Two body sections: Two body sections: 1) cephalothorax includes the head and chest fused together. 1) cephalothorax includes the head and chest fused together. 2) abdomen includes the tail. This is the part you eat!. 2) abdomen includes the tail. This is the part you eat!. 9. How is a crustacean crab different from a chelicerate horse shoe crab?

Crustaceans: sex identification in crabs Identify the sex of the Identify the sex of the Crab by looking at the abdomen. Females have wider Females have wider abdomens to carry the eggs. Males have narrower Males have narrower (triangular) abdomen.

Crustaceans: reproduction Sexual reproduction occurs often during the molting of the exoskeleton. Sexual reproduction occurs often during the molting of the exoskeleton. 10. What does the larva ( hatched egg) look like?

Crustaceans: reproduction Barnacles may be hermaphroditic, but sex is more common. A barnacle¹s penis will stretch quite a distance to fertilize a neighbor’s eggs. Barnacles may be hermaphroditic, but sex is more common. A barnacle¹s penis will stretch quite a distance to fertilize a neighbor’s eggs. 11. What does “hermaphroditic” mean?

Crustaceans: decapods Deca means 10 Deca means 10 Lobsters Shrimp Lobsters Shrimp Crabs CrabsCrayfish 12. How many legs do crabs and crayfish have?

PLATES: includes fries and onion rings PLATES: includes fries and onion rings Clam $10.95 Clam $10.95 Shrimp $10.95 Shrimp $10.95 Scallop $10.95 Scallop $10.95 Calamari (squid)$6.95 Calamari (squid)$6.95 Fried Lobster $16.95 Fried Lobster $16.95 Crab cakes $11.00 Crab cakes $11.00 Crawfish bisque $8.00 Crawfish bisque $8.00 Oysters on the half shell $12.00 Oysters on the half shell $ Classify the items on the seafood menu as Mollusks or Crustaceans