animal kingdom

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animal kingdom

A main classification of living organisms that includes all animals.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

animal kingdom

a category of living organisms comprising all animals. The classification of animals into major groups is now generally agreed by most biologists, unlike the situation in the PLANT KINGDOM where there are several alternative systems of classification. The system below places the Protozoa in the animal kingdom, as in the older classical approaches to the classification, but in more modern approaches only the Parazoa and Metazoa are considered to be animals and the Protozoa are placed in several groupings of kingdom-equivalent status. See CLASSIFICATION.

Protozoa - single-celled animals

Parazoa - sessile, aquatic, porous animals

Porifera - sponges

Metazoa -

Coelenterata - two-layered, sac-like animals possessing a MESOGLOEA and stinging cells

Hydrozoa - hydra, colonial hydroids, siphonophores

Scyphozoa - jellyfish

Anthozoa - corals Phylum

- flattened, wormlike animals

Turbellaria - flatworms

Trematoda - flukes

Cestoda - tapeworms

Nematoda - roundworms

Nemertea - bootlace worms

Annelida - segmented worms

Polychaeta - paddle worms

Oligochaeta - earthworms

Hirudinea - leeches

Mollusca - soft-bodied animals often possessing a shell

Gasteropoda - snails

Lamellibranchiata - bivalves

Cephalopoda - squids and octopus

Arthropoda - jointed-limbed animals with an exoskeleton

Crustacea - water fleas, barnacles, crabs, etc.

Myriapoda - centipedes, millipedes

Arachnida - mites, ticks, scorpions, spiders

Insecta - insects

Echinodermata - spiny animals with a penta-radiate symmetry

Asteroidea - starfish

Ophiuroidea - brittle stars

Echinoidea - sea urchins

Holothuroidea - sea cucumbers

Crinoidia - feather stars and sea lilies

Chordata - animals possessing a notochord at some stage during their development

Protochordata - sea squirts, Amphioxus


Agnatha - jawless fishes, e.g. lamprey

Chondrichythyes - sharks

Choanichthyes - coelacanth, etc.

Actinopterygii - bony fish

Amphibia - salamanders, frogs, toads

Reptilia - reptiles

Aves - birds

Class Mammalia - mammals

Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
The ( "Animal Kingdom" Season 3 finale airs Tuesday at 9 p.m.
Both Ceredigion council and Borth Wild Animal Kingdom were contacted for further comment.
"Borth Wild Animal Kingdom operators have 28 days to consider the proposals and can either accept them in their entirety or lodge an appeal with the Magistrates Court."
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Michod, 41, wrote the lead specifically for Pearce, who was the lone established star in "Animal Kingdom.'' The movie brought international renown to the loose Aussie filmmaking collective dubbed Blue-Tongue Films, of which Michod and Edgerton are members.
"Disney's Animal Kingdom is already home to some of our guests' favorite attractions," said Tom Staggs, chairman of Walt Disney Parks and Resorts.
Animal Kingdom pulled furiously in the early stages and emptied out alarmingly as he beat only a couple of stragglers home, while O'Brien's son Joseph had given a beautiful demonstration of patience to produce Declaration Of War (15-2) to lead shortly before the line, rocketing clear of Aljamaaheer.
Betfred were on the front foot thanks to Animal Kingdom's poor show.
Victory, though, will not come easy for Animal Kingdom, who has been made the odds-on favorite by British bookmakers.
Ascot: American raider Animal Kingdom's bid to add a Royal Ascot victory to his Kentucky Derby and Dubai World Cup successes ended in huge disappointment when he finished unplaced in the Queen Anne Stakes on Tuesday.
AMERICAN raider Animal Kingdom has been attracting all the headlines since shipping to Britain and market support suggests he will be the star turn at Royal Ascot this year.
ANIMAL KINGDOM is heading for a possible showdown with last year's 2,000 Guineas and dual Derby winner Camelot in the Group 1 Prince of Wales's Stakes at Royal Ascot in June.