Echinodermata
E12809
Echinodermata is a phylum of marine invertebrates that includes starfish, sea urchins, sand dollars, and sea cucumbers, characterized by radial symmetry and a water vascular system.
Observed surface forms (3)
| Surface form | Occurrences |
|---|---|
| Crinoidea | 1 |
| Holothuroidea | 1 |
| Ophiuroidea | 1 |
Statements (53)
| Predicate | Object |
|---|---|
| instanceOf |
phylum
ⓘ
taxonomic rank ⓘ |
| characteristic |
bilateral symmetry in larvae
ⓘ
calcareous endoskeleton ⓘ coelomate body plan ⓘ deuterostome development ⓘ lack of cephalization ⓘ marine invertebrates ⓘ mostly benthic lifestyle ⓘ ossicles in body wall ⓘ pentaradial symmetry in adults ⓘ regenerative abilities ⓘ tube feet ⓘ water vascular system ⓘ |
| circulatoryFeature | lack of true blood vascular system ⓘ |
| circulatorySystem | water vascular system for locomotion and feeding ⓘ |
| commonName | echinoderms ⓘ |
| domain |
Eukarya
ⓘ
surface form:
Eukaryota
|
| ecologicalRole |
bioturbation of sediments
ⓘ
grazers on algae and biofilms ⓘ important benthic ecosystem engineers ⓘ |
| etymology | from Greek 'echinos' (spiny) and 'derma' (skin) ⓘ |
| feedingModes |
deposit feeding
ⓘ
predation ⓘ scavenging ⓘ suspension feeding ⓘ |
| fossilRecord | well represented in Paleozoic and later marine sediments ⓘ |
| gasExchange | via tube feet and body surfaces ⓘ |
| habitat |
deep sea
ⓘ
intertidal zones ⓘ marine environments only ⓘ |
| includesClass |
Asteroidea
ⓘ
Echinodermata self-linksurface differs ⓘ
surface form:
Crinoidea
Echinoidea ⓘ Echinodermata self-linksurface differs ⓘ
surface form:
Holothuroidea
Echinodermata self-linksurface differs ⓘ
surface form:
Ophiuroidea
|
| includesOrganismType |
basket stars
ⓘ
brittle stars ⓘ sand dollars ⓘ sea cucumbers ⓘ sea stars ⓘ sea urchins ⓘ starfish ⓘ |
| kingdom | Animalia ⓘ |
| larvalSymmetry | bilateral symmetry ⓘ |
| nervousSystem | decentralized nervous system without true brain ⓘ |
| notableFeature |
ability to evert stomach in some starfish
ⓘ
evisceration defense in some sea cucumbers ⓘ |
| reproduction |
mostly sexual reproduction with external fertilization
ⓘ
some asexual reproduction by fragmentation ⓘ |
| sisterGroup | Hemichordata within deuterostomes ⓘ |
| skeletonType | endoskeleton of calcium carbonate ⓘ |
| symmetry | radial symmetry in adults ⓘ |
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Ophiuroidea
this entity surface form:
Holothuroidea
this entity surface form:
Crinoidea