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Invertebrate is a term coined by Jean-Baptiste Lamarck to describe any animal without a spinal column. It therefore includes all animals except those in the subphylum Vertebrata (fish, reptiles, amphibians, birds and mammals).
Lamarck divided these animals into two groups, the Insecta and the Vermes, but now, they are classified into over 30 phyla, from simple organisms such as sponges and flatworms to complex animals such as arthropods and mollusks.
Since invertebrates include all animals except a certain group, invertebrates form a paraphyletic group, but, despite not forming a "natural group" (that is, monophyletic), "invertebrate" is still a widely used term. Invertebrates include 97% of all animal species.
More on [ Invertebrate ]
Invertebrates :: Exotic
Animalia :: Flora and Fauna
Beautiful hunger: time-lapse photography of Antarctic invertebrates enjoying an oceanic meal http://bit.ly/4Chmhf
edbites (Carrie Arnold) Sun, 13 Dec 2009 22:48:55 -0000
Beautiful hunger: time-lapse photography of Antarctic invertebrates enjoying an oceanic meal http://bit.ly/4Chmhf
Ultimate Secrets To Saltwater Fish And Invertebrates http://bit.ly/GaJdT
AnimalCare20 (Animal Care) Sun, 13 Dec 2009 20:03:17 -0000
Ultimate Secrets To Saltwater Fish And Invertebrates http://bit.ly/GaJdT
Invertebrates Sale:Nutrimar Tigrio Bottled Copepods Starting at $11.99 http://bit.ly/MYScA
reeftankUSA (Guy Clayden) Sun, 13 Dec 2009 17:17:34 -0000
Invertebrates Sale:Nutrimar Tigrio Bottled Copepods Starting at $11.99 http://bit.ly/MYScA
Invertebrates Sale:Blood Red Fire Shrimp Starting at $19.99 http://bit.ly/MYScA
reeftankUSA (Guy Clayden) Sun, 13 Dec 2009 17:16:56 -0000
Invertebrates Sale:Blood Red Fire Shrimp Starting at $19.99 http://bit.ly/MYScA
Ultimate Secrets To Saltwater Fish And Invertebrates. http://bit.ly/5F08gP
ameetroyce (Ameet Royce) Sun, 13 Dec 2009 15:20:33 -0000
Ultimate Secrets To Saltwater Fish And Invertebrates. http://bit.ly/5F08gP
Ultimate Secrets To Saltwater Fish And Invertebrates. - http://bit.ly/8quAiw
RyanTHopkins (Ryan T Hopkins) Sun, 13 Dec 2009 15:14:29 -0000
Ultimate Secrets To Saltwater Fish And Invertebrates. - http://bit.ly/8quAiw
Coleopterists Society - An international organization devoted to the study of systematics, biology and conservation of beetles.
Environmental Entomology - Invertebrate and freshwater macroinvertebrate surveys and databases, environmental impact assessments and invertebrate conservation
Meta Description: [ Environmental Entomology, Invertebrate and Freshwater Macroinvertebrate Surveys, Bird and Insect Databases, Environmental Impact Assessments, Invertebrate Conservation ]
Insect Conservation and the UK - Giving information on the biodiversity action plans and links to sites with biodiversity information.
Invertebrate Conservation Research Centre - University of Natal, Pietermaritzburg, South Africa, established in 1992, aiming to undertake research that directly enhances the continued survival of invertebrates, especially insects.
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Spider Conservation - Information about the threats to US spiders and their conservation.
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