Agelas axifera. a living specimen b skeleton fragment with two spicular types, axially embedded in a fibre and arming the surface c acanthostyles d acanthoxea (a modified from an original underwater shot by J. Hooper b–d modified from Hentschel 1911).

  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.