Robert O. Schuster

• A revision of the genus Pselaptrichus Brendel (Coleoptera: Pselaphidae)
• Tardigrada from the Galápagos and Cocos Islands
• Tardigrada from western North America
• The mite family Heterocheylidae Trȧgärdh
• The mite family Heterocheylidae Tragärdh