Neoaganides is a small, 1–2 cm diameter subdiscoidal to subglobular goniatitid belonging to the family Pseudohaloritidae that lived from the Late Pennsylvanian to the Late Permian, existing for some 56 million years.

The shell of Neoaganides has a well-developed hyponomic sinus and shallow lateral reentrents at the aperture outlined by growth lines.

The mature peristome rimming the aperture is simple and unconstricted, without pronounced lappets.

The suture is simple, goniatitic, with essentially symmetrical, undivided lobes.

Neoaganitdes is included in the subfamily Shouchangoceratinae, which are pseuohalorids characterized by rounded or attenuate "goniatitic" sutures, and most likely gave rise to the other, more prominently sculptured genera in the same subfamily.