A review of Phylum Echinodermata. ... Reproduction; Echinoderms have the ability to regenerate new parts asexually. They also have separate sexes with sex organs in each arm. Sexual reproduction involves releasing gametes into the water (external fertilization).
library.thinkquest.org/28751/review/animals/7.html
The phylum Echinodermata, which contains about 6000 species, gets its name from the Greek, literally meaning "spiny skin." This phylum exists exclusively in the sea and includes sea stars, urchins, brittle stars, and sea cucumbers. ... Although reproduction is usually sexual, involving fertilization of eggs by...
www.oceaninn.com/guides/echino.htm
PHYLUM ECHINODERMATA ... Hence some asexual reproduction is done by fission in asteroids and brittle stars. Sexual reproduction, however, predominates. Most are gonochoristic. Most have true gonads. Fertilization is usually external, though occasionally eggs are brooded on or in the body.
faculty.vassar.edu/mehaffey/academic/animalstructure/ou... faculty.vassar.edu/mehaffey/academic/animalstructure/outlines/echinodermata.html
Echinoderm - Wikipedia, the free encyclopedia
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Echinoderms (Phylum Echinodermata ) are a phylum of marine animals. Echinoderms are found at every ocean depth, from the intertidal zone to the abyssal zone. Aside from the problematic Arkarua , ...
en.wikipedia.org/wiki/Echinoderm
There are 5 related classes in the phylum Echinodermata (the Latin name means "spiny-skinned"). For a detailed list with all classifications click here: ... Reproduction is carried out by the release of sperm and eggs into the water. Most species produce pelagic (= free floating) planktonic larvae which feed on plankton.
www.starfish.ch/reef/echinoderms.html www.starfish.ch/reef/echinoderms.html
The Echinodermata, (from the Greek meaning spiny skin), ... Reproduction in Echinoderms reproduction is usually via external fertilization through eggs and sperm discharged into the water, and the majority of echinoderms have several planktonic larval stages before reverting to a sessile existence on the seafloor.
www.fossilmuseum.net/Tree_of_Life/Phylum-Echinodermata.... www.fossilmuseum.net/Tree_of_Life/Phylum-Echinodermata.htm
Echinodermata has approximately 7000 described living species and about 13,000 extinct species known from the fossil record. This phylum is the largest without any freshwater or terrestrial forms. (Brusca and Brusca, 2003;
animaldiversity.ummz.umich.edu/site/accounts/informatio... animaldiversity.ummz.umich.edu/site/accounts/information/Echinodermata.html
Reproduction in echinoderms is typically by external fertilization; eggs and sperm are freely discharged into the water. A few sea urchins brood their eggs in special pouches, but most provide no parental care. Most echinoderms go through several planktonic larval stages before settling down.
www.ucmp.berkeley.edu/echinodermata/echinolh.html www.ucmp.berkeley.edu/echinodermata/echinolh.html
• Deuterostome = blastopore develops into anus ... • Characteristic of the Phyla Echinodermata and Chordata ... Asexual Reproduction...
faculty.shc.edu/cchester/BIO205/Outlines/23echinoderm1.... faculty.shc.edu/cchester/BIO205/Outlines/23echinoderm1.htm
Characteristics of Echinodermata:-; 1)Possess 5-rayed symmetry, mostly radial, sometimes bilateral. ... 9)Without excretory organs. 10)Normally possesses a subepidermal system of calcareous plates ; 11)Reproduction normally sexual and gonochoristic. 12)Feeds on fine particles in the water, detritus or other animals.
www.earthlife.net/inverts/echinodermata.html www.earthlife.net/inverts/echinodermata.html