| Summary: | FIGURES 7–15. Halisarca dujardini. Ultrastructure of epithelial cells. TEM of choanocyte chamber of sponge from Barents Sea (Fig. 7); SEM of choanocytes of sponge from White Sea (Fig. 8); TEM (Fig. 9) and SEM (Figs. 10, 11) of exopinacocytes of sponges from White Sea; TEM (Fig. 12) and SEM (Fig. 13) of endopinacocytes of sponges from Japan (12) and White (13) Seas; TEM (Fig. 14) and SEM (Fig. 15) of basopinacocytes of sponges from Barents (14) and White (15) Seas. Abbreviations: B—symbiotic bacteria; Bp—basopinacocytes; C—external cuticle; CB—cytoplasmic bridge; CS—periflagellar cytoplasmic sleeve; EC—external cytoplasmic part; Enp—endopinacocyte; Exp—exopinacocytes; F—flagellum; Mv—microvilli; Nnucleus; Ph—phagosomes. Scale bars: 7—7 µm; 8—2 µm; 9—3 µm; 10—2 µm; 11—7 µm; 12—3 µm; 13—7 µm; 14— 1.5 µm; 15—10 µm. Published as part of Ereskovsky, Alexander V., Lavrov, Dennis V., Boury-Esnault, Nicole & Vacelet, Jean, 2011, Molecular and morphological description of a new species of Halisarca (Demospongiae: Halisarcida) from Mediterranean Sea and a redescription of the type species Halisarca dujardini, pp. 5-31 in Zootaxa 2768 on page 14, DOI: 10.5281/zenodo.206842
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