Arachnida: Spider
- Most are eight legged organisms
- Most are terrestrial
- Lack antennae and wings
- Have lungs
- Mainly carnivores
- Many have the ability to release venom into predators and prey
- Can be parasites
- Have two types of eyes: lateral and median ocelli
- Posses sensory hairs
- Some have fangs
- Fused head and throat known as cephalothorax
- Have an abdomen
- Lay eggs
- Scorpion
- Opiliones
- Solifugae
- Amblypygi
- Schizomida
- Palpigradi
- Ricinulei
- Dipluridae
- Araneae
- Acari
Insecta: Divided body
- Six-legged
- 1/2 pair(s) of legs
- Three main body segments: head, thorax, and abdomen
- Aquatic, terrestrial, and air organisms
- Over a million species
- Most hatch from eggs
- Move by walking, swimming, and flying
- Few species are parasitic
- Can go through complete or incomplete metamorphosis
- Have compound eyes
- Have antennae
- Some insects drink their food
- Some insects chew their food
- Many are ecologically beneficial
- Large biodiversity
- Beetle (Coleoptera)
- Ants (Formicide)
- Mosquito (Culicidae)
- Bee (Anthophila)
- Butterfly (Rhopalocera)
- Ladybug (Coccinellidae)
- Fly (Diptera)
- Crickets (Gryllidae)
- Fleas (Siphonaptera)
- Mantis (Mantodea)
- Heteroptera
- Cicada
- Dragonfly (Anisoptera)
Crustacea: Flexible shell
Examples:
- Posses swimmerets
- Most are aquatic organisms
- Two compound eyes
- Pair of green glands to assist with releasing waste
- Over 30,000 species
- Some are parasitic
- Can be as small as 0.01 millimeters and as large as 3.5 meters
- Have two-parted limbs
- Reproduce sexually
- Four pairs of walking legs
- Two chelipeds
- Have the ability to self amputate (autonomy)
- Scavengers
Examples:
- Crab (Brachyura )
- Caridea
- Isopoda
- Amphipoda
- Copepods
- Barnacles
- Malacostraca
- Woodlice (Oniscidea)
- Krill (Euphausiacea)
- Cladocera
- Ostracods
- Maxillopoda
Diplopoda: Foot, leg
Examples:
- Two pairs of legs per body segment; legs are tucked under body
- Can have anywhere from 80-400 legs
- Antennae
- Lack poisonous claws
- Herbivores and scavengers
- Cylindrical body shape
- Terrestrial organisms
- Can burrow
- 10,000 different species
- Known as “millipedes” or “thousand-leggers”
- Move slowly
- Clean structures
- Reproduces sexually
- Lay eggs in soil
Examples:
- Julida
- Polydesmida
- Glomerida
Chilopoda:
Examples:
- One pair of legs per segment; legs stick out
- Over 100 legs
- Antenna
- Simple eyes; most species are blind
- Can be as small as 5 centimeters and as large as 10 centimeters
- Sexual reproduction
- Posses venom to use against predators and prey
- Move easily through
- Terrestrial organisms
- Have clawed legs
- Normally are out at night
- Divided into two parts: head and trunk
Examples:
- Scutigeromorpha
- Scolopendromorpha
- Lithobiomorpha