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This is the main Invertebrate Group section. It displays the various Categories for all Taxonomic Groups as well as their relevant Sub Categories for your selection. You may expand each Sub Phylum heading by clicking each heading and its Sub Sections will become visible. You may also go to individual Sub Sections by clicking on them directly.

A description and/or common name has been added in each Sub Phylum Menu describing each group within it in order to assist the user.
The annelids, also known as the ringed worms or segmented worms, are a large phylum, with over 17,000 extant species including ragworms, earthworms, and leeches.
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The subphylum Chelicerata constitutes one of the major subdivisions of the phylum Arthropoda. It contains the horseshoe crabs, sea spiders, and arachnids.
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Re: Scorpions
by andrewgeorgejones
24 Sep 2017 21:54
Crustacea form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill and barnacles.
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Insects are a class of invertebrates within the arthropod phylum that have a chitinous exoskeleton, a three-part body, three pairs of jointed legs, compound eyes and one pair of antennae.
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by amberJ
04 Oct 2016 21:52
Myriapoda is a subphylum of arthropods containing millipedes, centipedes, and others. The group contains over 13,000 species, all of which are terrestrial.
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The molluscs or mollusks compose the large phylum of invertebrate animals known as the Mollusca. Around 85,000 extant species of molluscs are recognized.
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New Zealand Sub Fossil Id
by BCandusio
02 Aug 2016 21:29

TRILOBITA (1 topic)

Trilobites are a fossil group of extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest known groups of arthropods.
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Illaneus Sp. Trilobite
by bertc
23 Mar 2016 07:49


The velvet worms are a minor ecdysozoan phylum with approximately 180 species. These obscurely segmented organisms have tiny eyes, antennae, multiple pairs of legs, and slime glands.
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TARDIGRADA (No topics)

Tardigrades are water-dwelling, eight-legged, segmented micro-animals.
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