Euschoengastia mutabilis: Fuller 1952: 192; Wharton & Fuller 1952: 79; Radford 1954: 265, fig. 69.
Schoengastia (Ascoschoengastia) mutabilis: Womersley 1952: 180, pl. 44 (B–E).
Euschoengastia (Helenicula) mutabilis: Audy 1954: 153.
Globularoschoengastia mutabilis: Chen & Hsu 1955: 127; Hsu & Chen 1957: 250.
Helenicula mutabilis Audy 1957: 266; Womersley 1957a: 109; Womersley & Audy 1957: 281; Nadchatram & Traub 1971: 582, figs. 71–78; Nadchatram 1972: 193; Lakshana 1973: 18; Chau et al. 2007: 137; Mohd Zain et al. 2015: tab. 1; Chaisiri et al. 2016: 329.
Helenicula (Helenicula) mutabilis: Vercammen-Grandjean 1965b: 112; 1968b: 101.
Type deposition. BMNH 1932.7.18.17.
Type data. Ex Leopoldamys sabanus (syn. Rattus sabanus vociferans), Malaysia, Selangor State, Sungei Buloh Wetland Reserve.
Hosts. RODENTIA: Bandicota indica, Berylmys bowersi, Callosciurus caniceps, C. notatus, Dremomys pernyi, D. rufigenis, Lariscus insignis, Leopoldamys edwardsi, L. sabanus, Maxomys surifer, Menetes berdmorei, Niviventer cremoriventer, Rattus argentiventer, R. exulans, R. rattus, R. tanezumi, R. tiomanicus, Rhinosciurus laticaudatus, Sundamys annandalei, S. muelleri, Sundasciurus tenuis; CARNIVORA: Hemigalus derbyanus, Paradoxurus hermaphroditus, Prionailurus bengalensis, Prionodon linsang; SCANDENTIA: Ptilocercus lowii, Tupaia glis.
Distribution. Malaysia, Thailand, Vietnam.