From the fossil record, two species are known, originally described as
Proargentina inclinata (Danilt'chenko 1960) and
P. nebulosa (Danilt'chenko 1962) from the
Early Oligocene and
Early Eocene Dabakhana Svita Formation of
Georgia respectively. Jerzmanska assigned
Proargentina synonymous with
Glossanodon in 1968. == References ==