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"Arturia compacta is a species of calcareous sponge in the family Clathrinidae found in Mauritius. This species is very likely to be synonymous with Arthuria canariensis, differing only in its larger and thicker triactines. However, the type and only known specimen is lost. References World Register of Marine Species entry Clathrina Sponges described in 1877 Fauna of Mauritius "
"Clathrina conifera is a species of calcareous sponge from Brazil. The species name refers to the cone-shaped appearance of the triactines. Description Cormus formed of large, irregular and loosely anastomosed tubes, white in life and beige when preserved. Water-collecting tubes are absent. The skeleton is composed only of triactines without any special organisation. They are equiradiate and equiangular. Actines are conical and straight with blunt tips. References World Register of Marine Species entry Clathrina Fauna of Brazil Animals described in 2001 "
"Ascandra contorta is a species of calcareous sponge belonging to the family Clathrinidae. This is a whitish sponge which appears as a mass of irregular, convoluted tubes. It is very similar to Clathrina clathrus but usually differs in colour (C. clathrus is usually yellow) and by the presence of terminal oscula on vertical tubes (absent in C. clathrus). When viewed microscopically, the spicule structure of the two species is very different, A. contorta possessing two-pointed diactines and four-pointed tetractines as well as the three-pointed triactines which C. clathrus is exclusively made up of. This sponge is found on north-eastern Atlantic coasts from the Arctic to the Mediterranean, usually on rocks at depths of 10–30 m, but occasionally in shallower water. References *Clathrina contorta at Marine Species Identification Portal contorta Taxa named by James Scott Bowerbank "