English: FIGURE 2. Leuclathrina translucida sp. nov. A: Typical growth form in situ (holotype). The inset shows an opening at the end of an exhalant tube of another specimen, possibly an osculum; B: Specimen (SNSB-BSPG 30280) with a hanging growth form and smaller exhalant tubes. C: Detail of the outer sponge wall of the inhalant region with inhalant openings; C: Detail of the outer sponge wall of the exhalant tubes, showing the hexagonally arranged triactines around the translucent tissue areas (C-D: material fixed in 80 % ethanol); E-G: Section through the sponge wall at different regions of the sponge body; E: In the inhalant region the skeleton consists of several layers of tangential triactines, the choanosome is free of spicules; F: Transition between the inhalant and exhalant region: the choanosome gets thinner and is replaced by a layer of endopinacoderm. G: The thickness of the sponge wall is strongly reduced in the more distal parts of the exhalant tubes. H: Spicules (triactines); I: 3D reconstruction of the skeleton and the choanosome (coloured). Abbreviations: c= canal (inhalant or exhalant); ch= choanosome; enp= endopinacoderm; ex= exterior of the sponge wall; exh= exhalant body part; exp= exopinacoderm; inh= inhalant body part or inhalant opening; sk= skeleton.