Ellisellidae
Ellisellidae is a family of colonial marine invertebrates belonging to the order Ctenostomatida within the phylum Bryozoa. These animals are commonly known as “lace bryozoans” due to the intricate and delicate lace-like appearance of their colonies.
Characteristics
Ellisellids are characterized by their thin, membranous, and often delicate colonies. They exhibit a distinctive branching growth pattern, resembling intricate lace or net-like structures. These colonies are typically attached to hard surfaces such as rocks, shells, or seaweed.
Individual zooids, the tiny animals that make up the colony, are connected by thin, tubular stolons. These stolons form a network that allows for communication and nutrient sharing among the zooids. Each zooid possesses a polypide, a feeding apparatus with tentacles, and a protective structure called a cystid. The cystid can be either chitinous or calcareous, depending on the species.
Environments
Ellisellids are found in a wide range of marine environments, primarily in shallow, coastal waters. They are typically found in habitats with strong currents, as these currents help to transport food and oxygen to the colonies. Some species can be found in deeper waters, up to 100 meters in depth.
Distribution
Ellisellids have a global distribution, with species found in all oceans except the Arctic Ocean. They are particularly abundant in tropical and subtropical regions, where the warm waters provide ideal conditions for their growth and reproduction.