The Caudal ParaHox gene is required for hindgut development in the mollusc Tritia (a.k.a. Ilyanassa).
Johnson AB, Lambert JD. The Caudal ParaHox gene is required for hindgut development in the mollusc Tritia (a.k.a. Ilyanassa). Dev Biol. 2021 02; 470:1-9.