Template:Ijima, 1903

• Ijima, I. 1903. Studies on the Hexactinellida. Contribution III. (Placosoma, a New Euplectellid; Leucopsacidae and Caulophacidae). The Journal of the College of Sciences, Imperial University of Tokyo 18(1): 1–124, pls. I–VIII. BHL  
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Nomenclatural acts

• Date of publication: 1903

New names (7)

• Placosoma [p. 2] (preoccupied by Placosoma Fitzinger in Tschudi, 1847)
• Placosoma paradictyum [p. 2]
• Leucopsacidae [p. 29]
• Chaunoplectella spinifera [p. 71]
• Caulophacidae [p. 78]
• Caulophacus lotifolium [p. 87]
• Sympagella anomala [p. 97]