FIGURE 4 in Desmacella Schmidt, 1870 from Brazil: Description of two new species and a review of records (Desmacellida: Demospongiae: Porifera)

FIGURE 4. Desmacella annexa (MNRJ 2860) in SEM. A, preserved specimen; B, thick section showing the ectosome and choanosome; C, size variation of tylostyles; D, tylostyle base; E, size variation of toxiform microxeas; F, sigma I and sigma II; G, details of sigma I microspines; H, details of toxiform microxea microspines; I, details of sigma II microspines. Scale bars: A = 1 cm; B = 200 µm; C = 100 µm; D = 10 µm; E = 20 µm; F = 10 µm; G–H = 2 µm; I = 1 µm.