Kobayashi, T. & K, Ichikawa. 1952. The Triassic fauna of the Heki Formation in the Province of Tamba (Kyoto Prefecture), Japan. Japanese Journal of Geology and Geography 22: 55-96.
Kobayashi & Ichikawa, 1952. Japan Jour. Geol. Geogr. 22: 65.
Type species: Cardinioides japonocus Kobayashi & Ichikawa, 1952 = Cardinioides japonicus
Kobayashi & Ichikawa, 1952. Japan Jour. Geol. Geogr. 22: 66.