Early development in DendrasterThese micrographs illustrate interesting features of cleavage stages in the local sand dollar, Dendraster excentricus. Images belong to George von Dassow.

Animals: Part I

http://tolweb.org/tree/phylogeny.html

Phylum: Porifera

Class: Hexactinellida

Typical

Choanoflagellate

Copyright © Stephen Fairclough

Phylum: Cnideria

Class: Scyphozoa

Phylum: Platyhelminthes

Class: Turbellaria

MOLLUSCA

http://www.ted.com/talks/david_gallo_shows_underwater_astonishments.html

http://www.youtube.com/watch?v=1pJPnZFSy5o

Annelida

http://www.youtube.com/watch?v=fWIvV9QlNow

Phylum Arthropoda:

Contains 75-80% of all animal species.

Phylum: Arthropoda

Subphylum: Chelicerata

Class: Merostomata

Class: Arachnida

Order: Aranea

Order: Scorpiones

Order: Opiliones

Order: Acari

Subphylum: Myriapoda Class: Chilopoda

Class: Diplopoda

Subphylum: Crustacea Class: Maxillopoda

Subclass: Cirripedia

Class: Malacostraca

Subclass: Decapoda

Subphylum: Hexapoda Class: Insecta

Order: Key ‘em out!

Arthropoda:

Chelicerata

Arthropoda: Miriapoda

Arthropoda:

Crustacea

http://www.youtube.com/watch?v=Nd7o6ytz_LM

Arthropoda: Hexapoda

Echinodermata