Phylum Echinodermata
General Description
Examples of this group are sea urchins, sea cucumbers, sea stars, and sea lilies.
Their name comes from the words echinos- spiny; derma- skin; and ata- to bear.
All are marine.
Examples of this group are sea urchins, sea cucumbers, sea stars, and sea lilies.
Their name comes from the words echinos- spiny; derma- skin; and ata- to bear.
All are marine.
Specific Information
Echinoderms have an endoskeleton composed of ossicles.
All adults are built with pentaraidal symmetry (body parts are in 5's.)
They live a slow or sedentary life.
They have a water-vascular system.
Echinoderms have an endoskeleton composed of ossicles.
All adults are built with pentaraidal symmetry (body parts are in 5's.)
They live a slow or sedentary life.
They have a water-vascular system.
Characteristics of Echinoderms
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Classes of Echinodermata
Taxonomic Relationship Between Echinoderms and Arthropods
Similarities
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Differences
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Phylogenetic Tree of Echinodermata
Paddle-Spined Sea Star (Patiriella parvivipara)
- The smallest Sea Star in the world.
- Measure a half an inch (1/2 in)
- 6 arms, instead of 5
- Reproduction is done by splitting itself right down the middle.
- Found only on the southern coast of Australia.
- They are found in Class Asteroidea