• Pachytheca Canu, 1913 † accepted as Pachythecella Bassler, 1934 † [Family: Tessaradomidae]
• Pachytheca Hooker in Salter, 1861 † [Family: Plantae (awaiting allocation)]
• Pachytheca Qian, Yin & Xiao, 2000 † accepted as Dauritheca Peel & Gubanov, 2022 † [Family: Triplicatellidae]
• Pachytheca Schlüter, 1885 † [Family: Suberitidae]
• Pachytheca Schmidt, 2012 accepted as Bonnetina Vol, 1999 [Family: Theraphosidae]
• Pachythecalidae Cuif, 1975 †
• Pachythecalis Cuif, 1975 † (uncertain)