Welcome
To the Myriad Worlds
Of the Invertebrates

Most of the things living on this planet are invertebrates, so getting to know a little about them is a good idea. Invertebrates are members of the Kingdom Animalia, they are linked together by the fact that they have no backbone or vertebrae. They do not include the Protozoa who are generally considered to be part of the Kingdom Protista.

The diversity and number of invertebrates is mind boggling, most of them are insect however and you can find out about them at the Wonderful World of Insects

 

 


The Kingdom Animalia is divided into 34 phyla, (singular phylum), below is a list of the phyla with their common name and approximate number of named species. You can follow the links to a page about each phyla. In order to make certain that something is available concerning each phyla quickly I have written a brief introduction to each for the time being and am now involved in expanding these. Hence this part of The Earthlife Web should be considered to be Under Construction

Table of the Phyla of the Animal Kingdom
Scientific NameCommon NameNumber of Species
Phylum PlacozoaPlacozoa 1
Phylum Porifera Sponges 10 000
Phylum Cnidaria Sea Anenomes, Jellyfishes 9 500
Phylum Ctenophora Comb Jellies 90
Phylum Platyhelminthes Flat Worms 25 000
Phylum Mesozoa Mesozoa 50
Phylum Nemertina Ribbon Worms 900
Phylum Gnathostomulida Sand Worms 80
Phylum Gastrotricha Gastrotrichs 400
Phylum Rotifera Rotifers 2000
Phylum Nematoda Nematodes 80 000
Phylum Nematomorpha Horsehair Worms 240
Phylum Kinorhyncha Spiny-crown Worms 100
Phylum Loricifera Brush Heads 10
Phylum Acanthocephala Spiny-headed Worms 1 000
Phylum Cycliophora Cycliophorans 1
Phylum Entoprocta Marine Mats 150
Phylum Ectoprocta Bryozoans 5 000
Phylum Phoronida Phoronans 10
Phylum Brachiopoda Lamp Shells 335
Phylum Mollusca Slugs, Snails, Squid. 110 000
Phylum Priapulida Phallus Worms 16
Phylum Sipuncula Peanut Worms 320
Phylum Echiura Spoon Worms 140
Phylum Annelida Earthworms, Ragworms 9 000
Phylum Tardigrada Water Bears 700
Phylum Pentastoma Tongueworms 70
Phylum Onychophora Peripatus 80
Phylum Arthropoda Insects, Crabs, Spiders etc. 1 000 000
Phylum Pogonophora Beard Worms 120
Phylum Echinodermata Starfish and allies 6 000
Phylum Chaetognatha Arrow-worms 110
Phylum Hemichordata Hemichordates 90
Phylum Chordata Chordates
(Tunicates, Mammals, Birds etc.)
50 000

 

 



 

 

Have You Seen The Other Earthlife Web Chapters
The Home Page of the Fish The Birds Home Page The Insects Home Page The Mammals Home Page The Prokaryotes Home Page The Lichens Home Page







Index Gif               

 

 

This page was designed and written by Mr Gordon Ramel

 

 

Advertising Inquiries

         Disclaimer, Copyright and Privacy