Eciton (Aenictus) fergusoni var. sundaica Karavaiev, 1927f: 7 (w.) INDONESIA (Java). Indomalaya.

Primary type information: Primary type material: syntype workers (number not stated, “several”). Primary type locality: Indonesia: Sunda Strait, Prinsen I. (= Panaitan I.), 5.i.1913, Nr. 2398 (W. Karawajew). Primary type depositories: MZSP, SIZK. Primary type specimens: CASENT0916859, MZSP0082267. Type notes: 1) Radchenko et al., 2023: 17, cite 17 worker syntypes in SIZK. 2) Ulysséa et al., 2025: Table S1, cite 1 syntype worker in MZSP.