FIGURE 2. Placospherastra antillensis n.g., n in New sciophilous sponges from the Caribbean (Porifera: Demospongiae)

FIGURE 2. Placospherastra antillensis n.g., n. sp., SEM images of spicules (Holotype ZMA Por. 08973). A–B. Tylostyle and details of head and apex; C. Group of asters to show diversity and size differences; D. Spheraster of the surface plates (note ring-shaped ornamentation of spines between the rays); E. 'Diplaster', possibly juvenile condition of the spheraster; F. Various types of microstreptasters (microamphiasters and microspirasters)