Presentation on theme: "An arthropod is an invertebrate with an exoskeleton, a segmented body, and jointed legs."— Presentation transcript:
An arthropod is an invertebrate with an exoskeleton, a segmented body, and jointed legs.
There are more than 1 million kinds of arthropods on Earth.
An exoskeleton is a hard, outer covering.
Molting is to leave an exoskeleton and grow a new one.
A crustacean is an arthropod that has a hard, exoskeleton, two pairs of antennae, and a mouth for crunching and grinding.
Crustaceans can _____________ certain parts of their body. A ___________ can re-grow its claws. Most crustaceans live in ____________ and get oxygen from the water through _________. Gills are
What is Entomology? The study of insects (and their near relatives). What are insects (and near relatives)? Insects and their relatives are ARTHROPODS.
4 Orders - Spiders Araneae Scorpions Scorpionida Daddy Long legs Opiliones Ticks and Mites Arcarina
Characterisitics of spiders ( Order Araneae ) 6 pairs of appendages 4 pairs of walking legs 1 pr. of chelicera ( most anterior head appendage) 1 pr. of pedipalps no antennae no segmentation head-chest fused to form cephalothorax breathe with book lungs or trachea poison glands with fangs ( on the chelicera )
Black and Yellow Argiope (Garden Spider )
Brown recluse spider Violin shape on dorsal side
Female Black Widow Spider
Order Scorpionidae - segementation prominent
Harvestmen – Daddy Long legs Order Opiliones - feed more as scavengers
Adult female deer tick Order Arcarina
Cutting proboscis in mouth of tick
Female dog tick
Classes of Myriapods (many legged arthropods) (all have one pair of antennae, a head region, and trunk with many pairs of legs, use trachea) Diplopoda - millipedes Chilopoda - centipedes
Myriapods Millipede (Diplopoda) Two pair of legs per visible segment, attached under body. Centipede (Chilopoda) Pair of fangs under head, one pair legs per visible segment - attached to side of body. No fangs, no eyes, legs attached to side of body. [one pair of antennae, head & trunk regions, trunk with many pairs of legs]
Classes of Crustacea mostly marine, fresh water, a few terrestrial all have two pair of antennae five or more pairs of legs segmented abdominal appendages head & trunk or cephalothorax & abdomen body arrangement have gills Sowbugs or pillbugs Sand fleas Barnacles Crabs, lobster, shrimp
Crayfish cephalothorax (Decapoda) Sowbug (Isopoda), a terrestrial crustacean