Invertebrates are animals without backbones. This simple definition hides the tremendous diversity found within this group which includes protozoa (single-celled animals), corals, sponges, sea urchins, starfish, sand dollars, worms, snails, clams,...

An animal that does not possess a backbone or spinal column. Such creatures as insects and crustaceans are invertebrates. See also: EXOSKELETON;...

Any of the animals without a vertebral column (i.e. a backbone composed of individual vertebrae); not one of the...

Any species of animal lacking a back...

An invertebrate is an animal lacking a spinal column. The group includes 97% of all animal species — all animals except those in the Chordate subphylum Vertebrata (fish, reptiles, amphibians, birds and mammals). Carolus Linnaeus' Systema Naturae...

WHEATER C.P. AND COOK P.A. 2003: STUDYING INVERTEBRATES. Naturalists' Handbooks 28. The Richmond Publishing, Slough, 120 pp. ISBN 0-85546-313-9 (paperback). Price GBP 10.00. This thin handbook is written by two authors from the Department of Environmental and Geographical Sciences, Manchester Metropolitan University, and...

ANDERSON D.T.: INVERTEBRATE ZOOLOGY. Oxford University Press, Melbourne. 1st edition: 1998, 467 pp. ISBN 0-19-553941-9 (paperback). 2nd edition: 2001, 512 pp. ISBN 0195513681 (paperback). Price AU$ 80.00. Fourteen expert authors, mainly professors and associate professors from Australian universities, wrote this textbook under the...

A British zoo announced Wednesday the virgin birth of five Komodo dragons, giving scientists new hope for the captive breeding of the endangered species.In an evolutionary twist, the newborns' eight-year-old mother Flora shocked staff at Chester Zoo in northern England when she became pregnant without...

Two new invasive species have recently been found along the South Carolina coast _ a massive barnacle that dwarfs those found in the state as well as the Asian green mussel, which reproduces quickly and can pose a threat to floating docks.The barnacle is native...