Definition

Noun: 1. A small, sessile aquatic invertebrate animal belonging to the phylum Entoprocta. These animals are characterized by having a U-shaped gut, with both the mouth and the anus opening inside a crown of ciliated tentacles used for filter-feeding. They often live in colonies attached to submerged surfaces.

Usage

• The term "entoproct" is a specific zoological term used primarily in scientific contexts, such as biology, marine biology, and taxonomy.
• It refers to the individual animal (zooid) or can be used collectively for members of the phylum.

Examples

• Under the microscope, the researcher observed a colony of entoprocts attached to the seaweed.
• The defining feature of an entoproct is its lophophore, a feeding structure that encircles both the mouth and the anus.
• Entoprocts are sometimes confused with bryozoans, but their anatomical differences are significant.

Advanced Usage

• In taxonomic classification: "The phylum comprises fewer than 200 described species."
• In ecological studies: "The distribution of entoproct colonies can be an indicator of water quality."

Variants and Related Words

• Entoprocta (noun): The phylum name to which entoprocts belong.
• Kamptozoan (noun): An alternative, less common name for an entoproct.

Synonyms

• Kamptozoan (scientific synonym)

Notes on Meaning

• The name "entoproct" derives from Greek words meaning "inside" and "anus," directly referring to the internal position of the anus within the tentacular crown. This is the key feature distinguishing them from the similar-looking bryozoans (ectoprocts), which have the anus outside the tentacle crown.

Noun

1. any of various moss-like aquatic animals usually forming branching colonies; each polyp having a both mouth and anus within a closed ring of tentacles