Extinct genus of molluscs
Trenella is the sole genus in the Trenellidae, an extinct family of paleozoic Yochelcionellids.
2005 taxonomy.
The taxonomy of the Gastropoda by Bouchet &amp; Rocroi, 2005 categorizes Trenellidae in the superfamilia Yochelcionelloidea within the 
Paleozoic molluscs of uncertain systematic position. This family has no subfamilies.
2006-2007 taxonomy.
According to P. Yu. Parkhaev, the family Trenellidae is in the superfamily Yochelcionelloidea Runnegar &amp; Jell, 1976 within the order Helcionelliformes Golikov &amp; Starobogatov, 1975, subclass Archaeobranchia Parkhaev, 2001, class Helcionelloida Peel, 1991.
Genera.
Genera in the family Trenellidae include:
References.
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