Prehistroic Models: Echinodermata

Echinodermata means “spiny or hedgehog skin” consist of sea stars, sea urchins, sand dollars, sea cucumbers, and crinoids “sea lillyies”. Most animals have bilateral symmetry, adults echinoderms have pentameral (five-point) symmetry. The earliest members of this group appears during the Cambrian Period over 500 million years ago. The four features that define echinoderms are as followed: 1. Calcareous endoskeleton (calcium based) 2. Water vascular system 3. Mutable collagenous tissue 4. Radial symmetrical.

To see my fossil echinoderms click on the group name sea stars/brittle stars, sea urchins/sand dollars/sea cucumbers, and crinoids/blastoids/cystoids. To see my modern echinoderm specimen click on the these names sea urchins/sand dollars and sea stars/brittle stars.

Domain: Eukarya – Kingdom: Animalia – Phylum: Echinodermata – Superclass: Asterozoa – Class: Asteroidea

(sea  stars formally “starfish”)

Triassic to Present

Common name: Sea Star
Previous name: Formerly “Star Fish”
Time range: Triassic to Holocene
Common name: Sea Star
Previous name: Formerly “Star Fish”
Time range: Triassic to Holocene
Common name: Sea Star
Previous name: Formerly “Star Fish”
Time range: Triassic to Holocene
Common name: Sea Star
Previous name: Formerly “Star Fish”
Time range: Triassic to Holocene
Common name: Sea Star
Previous name: Formerly “Star Fish”
Time range: Triassic to Holocene

Domain: Eukarya – Kingdom: Animalia – Phylum: Echinodermata – Class: Rhombifera – Order: Dichoporita – Family: Pleurocystitdae 

(rhombiferan echinoderm)

Ordovician

Genus: Pleurocystites
Meaning: “rib bag or side bladder”
Time range: Late Ordovician
Locality: Europe and North America
Size: 2 centimeters (3/4 inch)
Diet: Plankton

Domain: Eukarya – Kingdom: Animalia – Phylum: Echinodermata – Subphylum: Echinozoa – Class: Holothuroidea

(sea cucumber)

Ordovician to Present

Common name: Sea Cucumber
Time range: Ordovician to Holocene

The video below is from my YouTube Jurassic James 65:

<< Back to Arthropod Models 

Specimen Gallery Homepage

Toys and Models Homepage

Next to Early Chordates Models >>