The calcareoussponges are members of the animal phylum Porifera, the cellular sponges. They are characterized by spicules made of calcium carbonate, in the form of high-magnesium calcite or aragonite. While the spicules in most species are triradiate, some species may possess two- or four-pointed spicules. Unlike other sponges, calcareans lack microscleres, tiny spicules which reinforce the flesh. In addition, their spicules develop from the outside-in, mineralizing within a hollow organic sheath.
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".
Clathrina aurea is a species of calcareous sponge from Brazil. Specimens of this species were previously misidentified with Clathrina clathrus
Clathrina ceylonensis is a species of calcareous sponge from Sri Lanka. The species name is derived from Ceylon, the former name of Sri Lanka.
Clathrina chrysea is a species of calcareous sponge from New Caledonia. The species epithet refers to the light yellow colour of the sponge.
Clathrina clathrus is a species of calcareous sponge belonging to the family Clathrinidae.
Clathrina coriacea is a species of calcareous sponge belonging to the class Calcarea and family Clathrinidae. Species in the genus Clathrina are composed of calcium carbonate tube-like skeletons containing spicules. The sponge can be located in shallow waters widely distributed along North Atlantic coasts, as well as on other coasts.
Arturia hirsuta is a species of calcareous sponge from South Africa. The name refers to the hispid surface of the sponge.
Clathrina hondurensis is a species of calcareous sponge from Belize. The species is named for British Honduras, the former name of Belize, at the time the holotype was collected in 1935.
Ascandra izuensis is a species of sea sponge in the family Clathrinidae. The species is named after the Izu peninsula where the holotype was collected.
Clathrina jorunnae is a species of calcareous sponge from Norway. It is only known from Trondheimsfjord, its type locality, where it was dredged from depths of 25–250 m (82–820 ft). The specimen was attached to a bryozoan of the genus Reteporella. The species is named after Jorunn Berg, Hans Tore Rapp's grandmother, who introduced Rapp to marine animals.
Clathrina laminoclathrata is a species of calcareous sponge from Australia. The species name is in reference to its unusual lamina.
Clathrina lacunosa is a species of calcareous sponge from the British Isles. The species name means "having holes" and refers to the perforations found in the sides of the sponge. It is usually found on vertical solid surfaces at depths down to 220 m. It is distributed in the north-eastern Atlantic from the Arctic to the Mediterranean. It is a fairly common sponge but is often overlooked due to its small size.
Clathrina mutsu is a species of calcareous sponge from Japan. The species is named after the type locality, Mutsu Bay
Clathrina sulphurea is an unaccepted scientific name and may refer to three species of calcareous sponge:
Arturia tenuipilosa is a species of calcareous sponge from Sri Lanka. The name refers to the very thin, hair-like oxea present in this species.
Borojevia tetrapodifera is a species of calcareous sponge from New Zealand. The species is named after the presence of tetrapods, the only Clathrinid sponge known to possess such spicules.
Aegires sublaevis is a species of sea slug, a nudibranch, a marine, opisthobranch gastropod mollusk in the family Aegiridae.
