(Note:Click the underlined and colored words)
| GROUP | DETAILS |
|---|---|
ACTINOPTERYGII |
Actinopterygians, or 'ray-finned fishes,' are the largest and most successful group of fishes and make up half of all living vertebrates. |
AVES |
The vertebrate class Aves includes the birds, an extremely distinctive and successful clade, with an estimated 9000 species. |
CHONDRICHTHYES |
These are fishlike vertebrates with well-developed fins and teeth, and with 2 pairs of fins, one of them supported by the pectoral girdle, the other by the pelvic girdle. Their most distinctive character, as contrasted with the bony fishes |
CRUSTACEA |
Approximately 30,000 species make up this Subphylum. Most are aquatic; of these, the majority are marine but some are found in fresh water |
HOLOTHUROIDEA |
Holothuroidea, or sea cucumbers, have around 1100 extant species |
INSECTA |
With around one million named species and perhaps several times that number unnamed, insects account for a great majority of the species of animals on earth |
MAMMALIA |
The class Mammalia includes about 5000 species in 26 orders. Systematists do not yet agree on the exact number or on how some orders and families are related to others |
REPTILIA |
Presented as a Class in our classification, includes turtles(Testudines), snakes and lizards(Lepidosauria), crocodiles and their relatives (Crocodilia). |
AMPHIBIA |
Refers to double life or life in water and on land |
ARACHNIDA |
Large class of arthropods includes over 60,000 species |
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