Subphylum Chelicerata
Body Forms
Chelicerate's bodies are split into two different regions...
The cephalothorax (prosoma) contains the eyes, the appendages, and the mouth.
The abdomen (opisthosoma) contains every important organ.
Chelicerate's bodies are split into two different regions...
The cephalothorax (prosoma) contains the eyes, the appendages, and the mouth.
The abdomen (opisthosoma) contains every important organ.
Common/Unique Characteristics
- All of their appendages are located on the cephalothorax
- They do not have antennae
- They have six pairs of appendages: Chelicerae (feeding), pedipalps (sensing), and 4 pairs of legs
Important Classes
- Class Acarina (ticks and mites [ectoparasites])
- Class Arachnida (spiders; 60,000 species; breathe with book lungs)
- Class Merostomata (horseshoe crabs; 4 species; last pair of legs changed for swimming)
- Class Scorpionada (scorpions; 2,000 species; pedipalps changed into claws)
Respiration
Chelicerates have "book lungs" which are folded gill-like lungs which they use to breathe.
Chelicerates have "book lungs" which are folded gill-like lungs which they use to breathe.
Subphylum Crustacea
Body Forms
Crustaceans' bodies are split into two different regions...
The cephalothorax contains the maxilliped, the pereopods (walking legs), the maxillae, the mandible, the antennae, and the antennule.
The abdomen contains the pleopods (swimmerettes) and the uropod (tail).
Crustaceans' bodies are split into two different regions...
The cephalothorax contains the maxilliped, the pereopods (walking legs), the maxillae, the mandible, the antennae, and the antennule.
The abdomen contains the pleopods (swimmerettes) and the uropod (tail).
Common/Unique Characteristics
- Have two pairs of antennae rather than one and they have Y-shaped appendages known as "biramous appendages"
- Fairly primitive, but lobsters and a few other crustaceans have slightly more developed brains
- Green glands filter blood and excrete ammonia, similar to human kidneys
- Crustaceans of class Branchiopoda use flat, leaf-like appendages for breathing, moving, and grabbing food
Important Classes
- Class Branchiopoda (fairy shrimp, brine shrimp, and water fleas; live in freshwater)
- Class Malocostraca (crabs, lobsters, crayfish, shrimp, krill, isopods, and amphipods; common food for humans; shield-like carapace; the abdomen of Malocostracans have more appendages and are muscular)
Respiration
Malocostracans simply use their gills to breathe.
Branchiopodans use leaf-like appendages.
Malocostracans simply use their gills to breathe.
Branchiopodans use leaf-like appendages.
Subphylum Hexapoda
Body Forms
Their bodies are divided into three parts: the head (antennae, mouthparts, and eyes), the thorax (legs, wings, and tympanum [detects sound waves], and spiracles [used for breathing]), and the abdomen (reproductive organs).
They also have five pairs of head appendages: the antennae, the mandibles, the maxillae, the labrum, and the labium.
Their bodies are divided into three parts: the head (antennae, mouthparts, and eyes), the thorax (legs, wings, and tympanum [detects sound waves], and spiracles [used for breathing]), and the abdomen (reproductive organs).
They also have five pairs of head appendages: the antennae, the mandibles, the maxillae, the labrum, and the labium.
Common/Unique Characteristics
- Their bodies have three parts, rather than two
- They have one pair of antennae
- Most adults have three pairs of legs
- Almost all insects have wings
Important Classes
Class insecta is the big class that is made up of four important orders: Order Coleoptera (beetles), Order Lepidoptera (moths and butterflies), Order Diptera (flies), and Order Hymenoptera (ants, bees, and wasps).
Class insecta is the big class that is made up of four important orders: Order Coleoptera (beetles), Order Lepidoptera (moths and butterflies), Order Diptera (flies), and Order Hymenoptera (ants, bees, and wasps).
Respiration
Insects don't have lungs, they use tracheae - a system of tubes - to breathe.
Air enters through the spiracles and moves through the tubes and the gases are converted by the cells.
Insects don't have lungs, they use tracheae - a system of tubes - to breathe.
Air enters through the spiracles and moves through the tubes and the gases are converted by the cells.
Sources: http://www.ucmp.berkeley.edu/arthropoda/crustacea/appendages.html
http://animals.about.com/od/arthropods/p/arthropoda.htm
Edmodo notes
http://animals.about.com/od/arthropods/p/arthropoda.htm
Edmodo notes
Representative Organism: Myrmeleontidae
- Class: Insecta
- Scientific name: Myrmeleontidae
- Common name: Antlion
- Is given the name "Antlion" because of its appearance in its larval form and its diet that primarily consists of ants. So, it is a "lion" to ants
- Usually brown and grey, has bristles
- Goes through complete metamorphosis
- Adult antlions look similar to dragonflies and can fly
- It is only active in the evenings
- Antlions are considered beneficial insects
- They are found in North America
Sources: http://www.antlionpit.com/taxonomy.html
http://www.antlionpit.com/what.html