FIGURE 20A–F in Description of new chiactine-bearing sponges provides insights into the higher classification of Calcaronea (Porifera: Calcarea)

FIGURE 20A–F. Sarsinella karasikensis sp. nov. A: SEM image of atrial chiactine and cortical triactine type II. B: SEM image of a chiactine found around the exhalant opening. C: SEM images of the atrial layer including an exhalant opening. D: SEM image of trichoxea. E: SEM images of oscular chiactine. F: SEM images of oscular triactine. Abbreviations: Chi = chiactines; CtrII = cortical triactines II; Exo = exhalant opening.