Shells minute, skeneiform, translucent. The animals live in association with sunken driftwood or hydrothermal vents.
Hyalogyrina Pilsbry & McGinty, 1946:
Protoconch smooth, minute, rapidly expanding, with « a very small and finely malleated nucleus » – Romani & al.: “Remarks on the Mediterranean marine Valvatoidea (Gastropoda: Heterobranchia)”, Bollettino Malacologico vol. 57, Milano 2021, p.171.
