The Clathrinida are an order of Calcinea; they have calcareous skeletons, and are strictly marine. These sponges have an asconoid structure and lack a true dermal membrane or cortex. The spongocoel is lined with choanocytes.
Clathrina is a genus of calcareous sponge in the family Clathrinidae. Several species formerly in Clathrina were transferred to the newly erected genera Arturia, Ernstia, Borojevia, and Brattegardia in 2013. The name is derived from the Latin word "clathratus" meaning "latticed".
Spongilla is a genus of freshwater sponges in the family Spongillidae found in lakes and slow streams. Sponges of the genus Spongilla attach themselves to rocks and logs and filter the water for various small aquatic organisms such as protozoans, bacteria, and other free-floating pond life. Unlike marine sponges, freshwater sponges are exposed to far more adverse and variable environmental conditions, so they have developed gemmules as a means of dormancy. When exposed to excessively cold or otherwise harsh situations, the sponges form these gemmules, which are highly resistant "buds" that can live dormant after the mother sponge has died. When conditions improve, the gemmules "germinate" and a new sponge is born.
Homoscleromorpha is a class of marine sponges composed of two families: Plakinidae and Oscarellidae.
Axinellidae is a family of sponges in the order Axinellida.
Leuconia is a genus of calcareous sponges in the family Baeriidae. It was described by English anatomist and zoologist Robert Edmond Grant in 1933.
Amphimedon is a genus of sponges with over 60 described species. The genome of one, Amphimedon queenslandica, has been sequenced.
Ptilocaulis is a genus of demosponges. The species within this genus are usually red or orange. They are often called tree sponges, as they grow many branches from a single stem resembling trees. They can grow to large size.
Chondrilla is a sea sponge genus belonging to the phylum Porifera.
Myxillina is a suborder of poecilosclerid sponges.
Agelas flabelliformis, also known as the elephant ear sponge, is a species of demosponge. It takes the form of a large leathery slender flap and is found in the Caribbean area at depths down to 100 metres (330 ft).
Mycale laevis, the orange icing sponge or orange undercoat sponge, is a species of marine demosponge in the family Mycalidae. Mycale is a large genus and this species is placed in the subgenus Mycale making its full name, Mycale (Mycale) laevis. This sponge is found in the Caribbean Sea and the Gulf of Mexico and usually grows in association with one of a small number of species of coral.
Dictyoceratida is an order of sponges in the subclass Ceractinomorpha containing five families. Along with the Dendroceratida, it is one of the two orders of demosponges that make up the keratose or "horny" sponges, in which a mineral skeleton is minimal or absent and a skeleton of organic fibers containing spongin, a collagen-like material, is present instead.
Petrosina is the name of a suborder of marine haplosclerid sponges. It includes three families.
Amphimedon massalis is a species of sponge in the taxonomic division of Demosponges. The body of the sponge consists of silica needles and sponge fibres and is capable of taking in much water.
Spongillida is an order of demosponges in the subclass Heteroscleromorpha.
Geodia megastrella is a sponge species from the Geodiidae family. It is found in the waters of the North Atlantic. The species was first described by Henry John Carter in 1876.
Trichogypsiidae is a family of poriferans in the class Calcarea.
