cheilostome

Colonial marine invertebrate

A cheilostome is a type of bryozoan—a tiny colonial marine invertebrate that forms encrusting or branching structures on rocks, shells, and seaweed.

Cheilostomes are distinguished by a hinged lid that can close over each zooid's opening.

They're the most diverse and abundant bryozoans in modern oceans, often appearing as lacy or moss-like growths on underwater surfaces.

bryozoan

polymorphism

Many forms, one interface

calcification · exoskeleton · stolon · operculum · orifice

marine

reef

Underwater rock or coral formation

filter feeder · calcium carbonate · invertebrate · marine ecosystem · substrate · kelp forest · fouling · larvae · settlement · pilings

fossil

paleontology

Study of ancient organisms

fossilization · sediment · extinction · petrification · mineralization · paleobiology · limestone · marl

Opposites
bryozoan taxonomy

cheilostomefenestrate

Having window-like openings

colonial marine invertebrate type

cheilostomecoral

Marine skeletal formation

hydrozoan · tunicate · sponge

Familiarity
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