2007-04-13 08:45:19 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Biology
Echinoderms.
If I recall correctly, this includes the platypus and echidna.
EDIT: I recalled incorrectly.
Echinoderms are spiny sea creatures, like sea urchins.
Learn more (like I just did) below:
http://en.wikipedia.org/wiki/Echinoderma
2007-04-13 08:48:36 · answer #1 · answered by Brian L 7 · 0⤊ 0⤋
echinodermata translates as spiny skin and it is mainly star fish that are in that phylum. I've never heard of anything else in the phylum. I apologize, after further researching, there are others, sea urchins and and such. It is one of the most primitive phylums in the Animal kingdom.
2007-04-13 08:54:08 · answer #2 · answered by wildlifenerd 2 · 0⤊ 0⤋
Echinoderms are marine animals with radial symmetry in the adults, bilateral symmetry in the larvae, and spiny skin (some way more spiny than others). The sea urchins can have very long and sharp spines while other sea urchins have thick, stubby spines. Starfish have short spines imbedded in the skin, making them look bumpy. Brittle stars and sea cucumbers are also in this group.
2007-04-13 10:19:30 · answer #3 · answered by ecolink 7 · 1⤊ 0⤋