Proceratium gibbosum Sadasivan & Kripakaran, 2022: 21371, figs. 1-6 (w.) INDIA (Kerala). Indomalaya.

Primary type information: Primary type material: holotype worker. Primary type locality: India: Kerala State, Idukki District, Periyar Tiger Reserve, Vallakadavu, 900 m, 23.v.2016, tray sifting loose soil under decaying log, forest floor, primary evergreen forest (Kalesh Sadasivan). Primary type depository: NCBS. Primary type specimen: NRC-AA-3758. Secondary type information: Secondary type material: 3 paratype workers (2 in alcohol). Secondary type locality: same as for holotype except 930 m, 28.iii.2021. Secondary type depositories: NCBS, ZSI. Secondary type specimens: NRC-AA-3759, TARG-1009 (in alcohol), TARG-1010 (in alcohol).