montis Matthew, 1889 is known from the Middle Cambrian of the Russian Federation (Kounamkites-zone, Daldyn river Basin, and Nekekit River; Ovatoryctocara-zone, Molodo River, Olenik Uplift, Yakutia; Shistocephalus antiquus-zone, Lena River), and Canada (Mount Stephen, British Columbia; Bathyuriscus-Elrathina-zone, Rocky Mountains).
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deons Jell and Webbers, 1992 has been collected in the Middle Cambrian of Antarctica (Triplagnostus gibbus-zone, Edson Hills, Ellsworth Mountains, West Antarctica).