FIGURE 4 in A new species of Oscarella (Demospongiae: Plakinidae) from the Western Sea of Japan

FIGURE 4. The anatomical structures of Oscarella malakhovi sp. nov. A) Light microscopy micrograph, showing the external part of sponge with the ectosome. B) SEM micrograph, showing the ostium, inhalant canal, exopinacoderm and choanocyte chambers distribution. C) SEM micrograph, showing the choanocyte chamber and apopyle. D) SEM micrograph, showing the exopinacoderm with the ostia arrangements. Abbreviation: Ap — apopyle; CC — choanocyte chamber; Ex — exopinacoderm; Ic — inhalant canal; O — ostium.