Platyhelminthes

Tapeworm taxonomic group

Platyhelminthes is the phylum of flatworms in biological taxonomy.

These are bilaterally symmetrical invertebrates lacking a body cavity, including planarians, tapeworms, and liver flukes.

The name comes from Greek words meaning "flat" and "worm." In formal scientific contexts, phylum names appear capitalized and often italicized: Class Cestoda belongs to phylum Platyhelminthes. (Lowercase platyhelminthes occasionally appears in informal or older texts.)

anatomy

mesoderm

Embryonic tissue forming muscles

tegument · protonephridia · eyespots · auricles · scolex · hermaphroditic · osmoregulation · bilateral · soft-bodied · unsegmented

free-living

planarian

Regenerative freshwater flatworm

predator · scavenger · benthic · aquatic · gliding · cilia · mucus · carnivorous · eyespots · auricles

classes

planarian

Regenerative freshwater flatworm

regeneration

planarian

Regenerative freshwater flatworm

regrowth · immortality · proliferation · transdifferentiation · morphogenesis

parasitic

tapeworm

Segmented intestinal parasite

infection · infestation · larvae · oncosphere · life-cycle · endoparasite · tegument · intestinal

taxonomy

phylum

Major classification rank

kingdom · bilateral · flatworms

Categories
Opposites
body plan complexity

PlatyhelminthesChordata

Phylum featuring notochords

Arthropoda · Mollusca

body shape morphology

Platyhelminthesroundworms

Unsegmented parasitic worms

body complexity and segmentation

Platyhelminthesearthworms

Soil-dwelling segmented invertebrates

leeches · Arthropoda

Familiarity
Top 2,000,000
Profile
Used worldwide · Timeless · Concrete · Rated G