Ptilocaulis

Ptilocaulis is a genus of demosponges. The species within this genus are usually red or orange. They are often called tree sponges, as they grow many branches from a single stem resembling trees. They can grow to large size.

Species
The following species are included in the genus Ptilocaulis:
 * Ptilocaulis aulopora (Schmidt, 1870)
 * Ptilocaulis bistyla (Hechtel, 1983)
 * Ptilocaulis braziliensis (Hechtel, 1983)
 * Ptilocaulis digitatus Topsent, 1928
 * Ptilocaulis echidnaeus (Lamarck, 1814)
 * Ptilocaulis fosteri (Hechtel, 1983)
 * Ptilocaulis marquezii (Duchassaing & Michelotti, 1864)
 * Ptilocaulis spiculifer (Lamarck, 1814)
 * Ptilocaulis walpersii (Duchassaing & Michelotti, 1864)