See text Omalogyra (Ammonicera) Vayssière, 1893 Ammonicera is a genus of minute sea snails, marine gastropod molluscs or micromollusks in the family Omalogyridae.

[1] This genus comprises the smallest gastropods known, featuring discoid, planispiral shells that typically measure in the adult state 1 mm or even less in size.

The protoconch is characterized by distinct ridges and grooves.

The teleoconch typically displays prominent sculpture, though it is occasionally weak.

[2] Species within the genus Ammonicera include: