What is "numaegilina"

Numaegilina is a small genus of very small sea snails, pyramidellid gastropod mollusks or micromollusks. This genus is currently placed in the subfamily Chrysallidinae of the family Odostomiidae. It was originally described as a subgenus of ''Chrysallida" but was raised to generic status by Schander et al. (1999).A junior synonym is Paregila Laseron, 1951.