Neumayr (1883) and Odhner (1930) regarded the genus
Margarya as being closely related to several fossil European
viviparids, which Neumayr (1883) had assigned to the
extant, monospecific genus Tulotoma from Alabama (USA;
Hershler et al. 1990) (e.g., Viviparus zelebori Neumayr,
1869). In a series of studies, based on fossil gastropod faunas
from Southeast Asia and on the evolution of shell sculpture
in the Viviparidae, Annandale (1919, 1924) rejected these
misinterpretations and classified the evolutionary lineage of
Margarya as distinct from that of the fossil viviparids from
Europe. Obviously, his results were disregarded by Odhner
(1930), as well as many later scholars