..."Petrushevskaya (1975) synonymized the genera Spongodiscus Ehrenberg, 1854 (type species = Spongodiscus resurgens Ehrenberg, 1854, pl. 35B, IV, fig. 16) and Spongopyle Dreyer, 1889 (type species = Spongopyle setosa Dreyer, p. 119, pl. 11, figs. 97, 98). This synonymy is based on the belief that a pylome may or may not be present."
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