Monoplacophora
E97472
Monoplacophora is a small, primitive class of deep-sea molluscs characterized by a single cap-like shell and serially repeated internal organs, offering key insights into molluscan and bilaterian evolution.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| Nautilus (marine mollusk) | 1 |
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
class of molluscs
ⓘ
taxonomic class ⓘ |
| ancestralStatus | considered primitive within Mollusca ⓘ |
| belongsTo |
Lophotrochozoa
ⓘ
surface form:
clade Lophotrochozoa
subkingdom Eumetazoa ⓘ |
| bodyPlan | low, limpet-like profile ⓘ |
| bodySymmetry | bilateral symmetry ⓘ |
| characteristic |
multiple pairs of gills
ⓘ
multiple pairs of muscles ⓘ multiple pairs of nephridia ⓘ primitive molluscan features ⓘ serially repeated internal organs ⓘ |
| circulatorySystem | open circulatory system ⓘ |
| coelom | reduced coelom ⓘ |
| commonName | monoplacophorans ⓘ |
| distribution | worldwide oceans ⓘ |
| environment |
abyssal zone
ⓘ
bathyal zone ⓘ |
| feedingType |
detritivores
ⓘ
grazers ⓘ |
| fossilRecord | known from Paleozoic fossils ⓘ |
| habitat |
benthic zone
ⓘ
deep sea ⓘ |
| kingdom | Animalia ⓘ |
| larvalStage | trochophore-like larva ⓘ |
| lifestyle | slow-moving ⓘ |
| locomotion | muscular foot ⓘ |
| nervousSystem | simple nervous system ⓘ |
| notableGenus | Neopilina ⓘ |
| phylum | Mollusca ⓘ |
| rediscovery | rediscovered as living species in the 20th century ⓘ |
| reproduction |
separate sexes
ⓘ
sexual reproduction ⓘ |
| researchRelevance | important for phylogenetic analyses of Mollusca ⓘ |
| researchUse |
comparative anatomy of bilaterians
ⓘ
study of segmentation in molluscs ⓘ |
| respiration | ctenidia (gills) ⓘ |
| scientificImportance |
key to understanding bilaterian evolution
ⓘ
key to understanding molluscan evolution ⓘ |
| shellComposition | calcareous shell ⓘ |
| shellType | single cap-like shell ⓘ |
| size | small-bodied molluscs ⓘ |
| skeleton | shell as external skeleton ⓘ |
| substrateAssociation | soft sediment seafloor ⓘ |
| taxonomicRank | class ⓘ |
| thoughtStatus | long thought extinct ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Nautilus (marine mollusk)