Sipuncula

E394914

Sipuncula, commonly known as peanut worms, are a small phylum of unsegmented marine worms characterized by a retractable introvert and burrowing lifestyle in soft sediments or rock crevices.

All labels observed (2)

Label Occurrences
Sipuncula canonical 2
Echiura 1

How this entity was disambiguated

Statements (47)

Predicate Object
instanceOf phylum
taxon
bodySegmentation unsegmented
circulatorySystem lacks closed circulatory system
commonName peanut worms
depthRange intertidal to deep sea
distribution worldwide in marine environments
domain Eukaryota
ecologicalRole bioturbation of sediments
nutrient recycling in benthic ecosystems
economicImportance minor role as fish bait in some regions
environment marine
excretorySystem metanephridia
feedingMode deposit feeder
suspension feeder
feedingStructure ciliated tentacular crown on introvert
firstScientificDescriptionCentury 19th century
gasExchange across body surface
hasAnusPosition terminal
hasBodyCavity coelomate
hasBodyPlan bilaterally symmetrical
hasBodyRegion introvert
trunk
hasBodyWall circular and longitudinal muscles
hasCharacteristic burrowing lifestyle
retractable introvert
hasCuticle thin cuticle covering epidermis
hasMouthPosition at tip of introvert
hasNervousSystem cerebral ganglion
ventral nerve cord
hasNotableOrder Phascolosomatida
Sipunculida
hasSexes mostly dioecious
hasTaxonomicHistory formerly grouped with Annelida by some authors
hasTentacles introvert tentacles around mouth
kingdom Animalia
larvalStage pelagosphera larva
trochophore larva
recognizedAs distinct phylum in most modern classifications
reproduction sexual reproduction
skeletonType hydrostatic skeleton
superphylum Lophotrochozoa
typicalHabitat rock crevices
soft sediments
typicalSubstrate coral rubble
mud
sand

How these facts were elicited

Referenced by (3)

Full triples — surface form annotated when it differs from this entity's canonical label.

Lophotrochozoa includesTaxon Sipuncula
Lophotrochozoa includesTaxon Sipuncula
this entity surface form: Echiura
Spiralia includes Sipuncula