FIGURE 5 in Description and molecular phylogeny of Tethya hibernica sp. nov. (Porifera, Demospongiae) from Northern Ireland with remarks on the European species of the genus Te t h y a *

FIGURE 5. SEM images of T. hibernica spicule morphology. A. Typical megasters. B. Acanthostrongylasters, which represent the major group of micrasters (>95%). C. Acanthotylasters (rarest group of micrasters). D. Oxyasters, which are slightly more frequent than tylasters.