Annelida
E16565
Annelida is a phylum of segmented worms that includes earthworms, leeches, and many marine worms characterized by their ring-like body segments.
Observed surface forms (2)
| Surface form | Occurrences |
|---|---|
| Oligochaeta | 1 |
| Polychaeta | 1 |
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
phylum
ⓘ
taxonomicRank ⓘ |
| bodyPlan |
body divided into head trunk and pygidium
ⓘ
segmented body with repeated units ⓘ |
| characteristic |
bilateral symmetry
ⓘ
body divided into ring-like segments ⓘ closed circulatory system in most groups ⓘ coelomate body cavity ⓘ complete digestive tract ⓘ hydrostatic skeleton ⓘ metamerism ⓘ presence of setae or chaetae in many species ⓘ segmented nervous system with ventral nerve cord ⓘ triploblastic body organization ⓘ |
| circulatorySystem | closed in most annelids ⓘ |
| commonName |
annelids
ⓘ
segmented worms ⓘ |
| describedBy | Jean-Baptiste Lamarck ⓘ |
| development | protostome ⓘ |
| domain |
Eukarya
ⓘ
surface form:
Eukaryota
|
| ecologicalRole |
important prey for many animals
ⓘ
organic matter decomposition ⓘ soil aeration ⓘ |
| economicImportance |
earthworms used in soil improvement and composting
ⓘ
leeches used historically in medicine ⓘ |
| excretorySystem | paired nephridia in many segments ⓘ |
| feedingType |
blood-feeding in many leeches
ⓘ
detritivores in many species ⓘ predators in some species ⓘ |
| habitat |
freshwater environments
ⓘ
marine environments ⓘ terrestrial environments ⓘ |
| includesClass |
Clitellata
ⓘ
Annelida self-linksurface differs ⓘ
surface form:
Polychaeta
|
| includesOrganism |
earthworm
ⓘ
leech ⓘ marine bristle worm ⓘ |
| includesSubclass |
Hirudinea
ⓘ
Clitellata ⓘ
surface form:
Oligochaeta
|
| kingdom | Animalia ⓘ |
| larvalForm | trochophore larva in many marine species ⓘ |
| musculature | circular and longitudinal muscles in body wall ⓘ |
| reproduction |
many hermaphroditic species
ⓘ
mostly sexual reproduction ⓘ |
| respiration |
through gills or parapodia in many marine forms
ⓘ
through skin in many terrestrial forms ⓘ |
| skeletonType | hydrostatic skeleton based on coelomic fluid ⓘ |
| superphylum | Lophotrochozoa ⓘ |
| symmetry | bilateral ⓘ |
| taxonAuthor | Jean-Baptiste Lamarck ⓘ |
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Oligochaeta
this entity surface form:
Polychaeta