an arthropod is an invertebrate with an exoskeleton, a segmented body, and jointed legs
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 areARTHROPODS.
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 )
Trapdoor spider
Black andYellowArgiope
(Garden Spider )
Brown recluse spider
Violin shape on dorsal side
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]
Millipede (Diplopoda)
Centipede (Chilopoda)
Garden centipede
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