The Rhabdidae are scaphopod members of the same molluscan family, belonging to the order Dentaliida. It includes only one genus, Rhabdus, and five species, as follows: \n* Rhabdus aequatorius (Pilsbry & Sharp, 1897) \n* Rhabdus dalli (Pilsbry & Sharp, 1897) \n* Rhabdus perceptus (Mabille & Rochebrune, 1889) \n* Rhabdus rectius (Carpenter, 1864) \n* Rhabdus toyamaense (Kuroda & Kikuchi, 1933)