FIGURE 11 in Diversity and distribution patterns of Calcareous sponges (subclass Calcinea) from Martinique

FIGURE 11. Leucaltis clathria (UFRJPOR 7671). A. Specimen in situ. B. Specimen in ethanol. C. Larvae in the choanosome. D. Cross-section showing tangential cortical triactines and a large tetractine whose apical actine crosses the choanosome and penetrates the atrium. E. SEM micrograph of a tangential section of the atrial wall with sagittal triactines and tetractines and with two apical actines of cortical tetractines protruding into the atrium. F. SEM micrograph of a tangential section of the atrial wall showing sagittal triactines and tetractines. G. Choanosomal skeleton composed of small regular triactines and tetractines.