Agelas sansibarica sp. n. a skeletal network of spongin fibres echinated by spicules (SEM) b detail of fibres surface echinated by verticillate spicules (SEM) c section of a primary fibre cored by a verticillate acanthostrongyle d–e skeletal network (LM).

  Part of: Manconi R, Pronzato R, Perino E (2016) A new species of Agelas from the Zanzibar Archipelago, western Indian Ocean (Porifera, Demospongiae). ZooKeys 553: 1-31.