Trenella is the sole genus in the Trenellidae, an extinct family of paleozoic Yochelcionellids.

The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005[2] categorizes Trenellidae in the superfamilia Yochelcionelloidea within the Paleozoic molluscs of uncertain systematic position.

Parkhaev, the family Trenellidae is in the superfamily Yochelcionelloidea Runnegar & Jell, 1976 within the order Helcionelliformes Golikov & Starobogatov, 1975, subclass Archaeobranchia Parkhaev, 2001, class Helcionelloida Peel, 1991.

Genera in the family Trenellidae include:

This prehistoric mollusc article is a stub.