Formica caespitum Linnaeus, 1758: 581 (w.) SWEDEN. Palearctic.

Primary type information: Primary type material: neotype worker (by designation of Schlick-Steiner et al., 2006: 270). Primary type locality: neotype Sweden: Floghult Bohuslan, 100 m., 21.vi.2000, # il32 (C.A. Collingwood). Primary type depository: NHMW. Primary type specimen: CASENT0919632 (neotype).

Infrasubspecies

• T. c. c. brevicorne Emery, 1916
• T. c. c. debile Emery, 1909
• T. c. c. diverses Emery & Forel, 1879
• T. c. c. flavidulum Emery, 1909
• T. c. c. fusciclavum Emery, 1925
• T. c. c. hispanicum Emery, 1909
• T. c. c. rhodium Emery, 1915
• T. c. c. syriacum Emery, 1909
• T. c. c. turcomanicum Emery, 1909