Vertebrata

Characteristics 
Vertebrates are usually characterized by an arranged endoskeletal elements flanking the spinal cord. There are two pairs of elements in each metamere and on each side. They are called the interdorsals and basidorsals, and in the gnathostomes there are two additional pairs ventrally to the notochord, called the interventrals and basiventrals. There are other elements called arcuali, and they can fuse to the notochordal calcification. The centrum is the Vertabra, and the Vertabrae is the Vertebral column.


Class Descriptions

There are Four groups of Vertebrates,  reptiles, amphibians, birds, and mammals.


Reptiles
1: Alligator
2: Pseudemys Floridana
Cooters
3:Cheldrya Serpintina
Snapping Turtle4:Gopherus Polyphemus
 Gopher
5:Anolis Carolinenis
 Green Anole
6:Anolis Sagrei
Brown Anole 
7:Boa Constrictor
Snake
8:Coluber Constrictor
Snake
9:Tantilla Relicta Neilli
Crowned Snake
10:Eumeces Laticeps
 Skink


Ampibians
1:Bufo terrestris
Southern Toad

2:Acris gryllus dorsalis
 Cricket Frog

3:Hyla cinerea
 Tree Frog
4:Hyla squirella
 Tree Frog
5:Osteopilus septentrionalis
 Tree Frog6:Eleutherodactylus planirostris
 Neotropical Frogs7:Scaphiopus holbrookii holbrookii
 Spadefoot Toads8:Rana sphenocephala
 True Frogs9:Ambystoma talpoideum
 Mole Salamanders10:Rana catesbeiana
 True Frogs
Birds 
1:Bubo virginianus
 Owl
2:Ardea herodias
 Heron 3:Butorides striatus
 Heron
4:Egretta thula
 Egret
5:Buteo lineatus
 Hawk
 
Mammals 
1:Lasiurus borealis
 Bats
2:Tadarida brasiliensis cynocephala
 Free Tailed Bats

3:Lasiurus intermedius
 Bat
4:Dasypus novemcinctus
 Armadillos5:Procyon lotor
 Racoon
6:Felis domesticus
 Domestic Cat
7:Urocyon cinereoargenteus
 Grey Fox 
8:Sigmodon hispidus
 Rat
9:Sciurus carolinensis 
 Squierrel

10:Scalopus aquaticus
 Mole 

Reference: http://tolweb.org/Vertebrata
 http://natl.ifas.ufl.edu/Vert.htm

Arthropoda

Characteristics
This is the largest phylum with more than 80% of the living animals falling into this category. All members of this phylum have and external skeleton made of chitin ( the principal component of the exoskeletons of arthropods and of the bodies of fungi.) This provides protection for the organism. The body of the arthropods is composed of numerous segments called Somites. They have a dorsal heart, as well as a ventral nervous system. Arthropods have joint appendages , that are modified into organs for walking, eating and grasping purposes.

Major groups

Myriapada (millipedes)
Various wormlike arthropods of the class Diplopoda, having a long body composed of many narrow segments. Most have two pairs of legs.

Crustacia (crayfish)
Closely related to but smaller than the lobsters. 

Insecta (insects)
Any animal of the class Insecta, comprising small, air-breathing arthropods having the body divided into three parts (head, thorax, and abdomen), and having three pairs of legs and usually two pairs of wings.

Arachnidia (spiders)

any of numerous predaceous arachnids of the order Araneae, most of which spin webs that serve as nests and as traps for prey.

Ecological roles
They are of such importance because of their numbers, and diversity (more than 874,000 living.) Insects play an important role in the pollination of vegetation, and some are also a nutritious source of food. More than a thousand Arthropods have not been discovered and named. Most of these insects come from the rain forest, which has not yet been well explored.

References
http://www.entomology.umn.edu/cues/4015/handouts/Orders.htm
http://www.scienceclarified.com/Al-As/Arthropods.html
http://www.dictionary.com

Echinoderms

Characteristics
Echinoderms are usually characterized by radial symmetry, where they have several arms. The body consists of 5 equal segments in an echinoderm, where each holds different sets of internal organs. Echinoderms have no heart, brain, or eyes. Echinoderms have tentacle like structures called tube feet, they are controlled by a hydraulically vascular system. It's mouth is situated in the middle of its body on the bottom. There are about 6,000 known species of echinoderms.

Major groups
Echinoderms are marine invertebrates, with an internal skeleton and are often covered in spines.
The groups that are included in Echinoderms are:
Asteroidea (starfish) usually 5 limbs or more
Crinoidea  (sea lilies, and sand dollars)
Echinoidea (sea urchins)
Holothuroidea (sea cucumbers etc.)

Ecological roles
They have ecological importance in mainly just surviving, or being eaten. Humans use echinoderms are food, medicine, and research.

Referances
http://www.starfish.ch/reef/echinoderms.html
http://www.daviddarling.info/encyclopedia/E/echinoderm.html

Mollusca

Characteristics
Mollusks are bilaterally symmetrical, and has more than two cell layers, organs, and tissues. The body of mollusks has no cavity. They have a through gut, with a mouth and an anus. They have a pair of kidneys, and reproduce normally.Mollusks have an open circulatory system and have gaseous exchange organs called ctenidial gills. They feed on a wide range of materials, and live in various environments.

Major groups
Mollusca is a very wide range group that includes clams, snails, and octopus. Gastropods (snails) are coiled while bivalves (clams) have two shells that are bilaterally symmetrical.
All Mollusca:
Abalone
Bivalves (ribbed)
Bivalves (smooth)
Bivalves (mussel)
Bivalves (scallop)
Gastropods (high spiral)
Gastropods (low spiral)

Ecological roles
Mollusks which include land snails, freshwater snails, mussels, clams, and slugs, are vital to healthy ecosystems. Land snails, for example, not only provide food for a host of small mammals and birds, but they play vital roles in recycling nutrients in forests. Freshwater snails also provide food for fish, including trout and salmon, and recycle plant and animal waste. Mollusks are also considered ecological  indicators, providing a window into the health of and entire ecosystem

Referances
http://www.earthlife.net/inverts/mollusca.html
http://www.msnucleus.org/membership/html/jh/biological/mollusca/lesson1/mollusca1a.html

Aschelminthes (Nematode)

Parasite/Unifying
Many nematodes are microscopic. Many nematodes are parasites, and need a host to survive, and thrive. Some nematodes can be harmful to the host while others aren't at all. Nematodes will mainly compete with their host for nutrients. They can also block the lymphatic system (the system in which white blood cells are made to prevent swelling, disease, viruses etc.) which can cause swelling that is dangerous. There are four different types of parasites, human, animal, plant and insect.

References
http://classes.seattleu.edu/biology/biol235/hodin/nematodePriapulidGroup/nematodes/parasite.htm

Annelida

Characteristics
They are bilaterally symmetrical, and vary in form. Annelids have more than two cell layers tissue, and organs located in its body. It has two openings in its body, a mouth, and an anus. Its nervous system possesses an anterior nerve ring, ganglia and a ventral nerve chord. It also has a closed circulatory system. Annelids also possesses no true respiratory organs. Annelids are true coelomates and possess true coelom in their body. They are also hermaphrodites. In the end, these creatures live in most environments, like your back yard. 


Life function
These worms most of the time prefer to  live in aquatic locations. There are over 9,000 species known. Annelids vary in sizes, from the giant earthworms al the way down to the bloodworm. They live quietly in holes or they live more active lives. Growth occurs more laterally than in width. The most common known Annelid is the earth worm, which eats, and re-enriches soil.


Ecological roles


Earthworms have an important ecological role as they eat decomposing organic material. As well as they are decomposers. Many other Annelids have important ecological roles from making nutrient rich soil, to decomposing composts.

Referances
http://www.earthlife.net/inverts/annelida.html

Platyhelminthes

Platyhelminthes 

The members of Platyhelminthes are Nematoda, and Rotifera have a vermiform or wormlike shape. They are also the first to have third layer of cells, the mesoderm, instead of the epidermus and gastrodermis. The mesoderm in they're bodies produces muscular layers, an excretory system and a reproductive system. They have complex body cavitys that hold specialized organs, and the fluid for the cavitys act like an hydrostatic skeleton. Flatworms have their bodies loosly filled with cells and have a acoelomate body plan. The cells that fill them up, are called parenchyme, witch is one way of organizing they're body structure. Another way is a plan called pseudocoelomate body plan, witch has a fluid filled cavity full of pseudocoelom. The last body plan is the coelomate body plan,  they have they're tissues  lined with  mesodermal tissue. 

Parasites 

They also have many parasites, but not all are extremely dangerous. The most watched out are, Trematoda, Cestoda, often called tapeworms as well, and Digenea, also called Flukes.

Reference: http://cas.bellarmine.edu/tietjen/images/platyhelminthes.htm 

http://www.mcwdn.org/Animals/Flatworm.html