TetrapocillonTetrapocillon is a genus of sponges belonging to the family Guitarridae.The genus was first described in 1924 by Holger [Valdemar Brøndsted], with the type species being Tetrapocillon novaezealandia.SpeciesSpecies accepted by World [Register of Marine Species|WoRMS] are: Tetrapocillon atlanticus Tetrapocillon kurushimensis Tetrapocillon minor Tetrapocillon novaezealandiae ''Tetrapocillon patbergquistae''