カルー超層群
Permian-Triassic vertebrate footprints from South Africa: Ichnotaxonomy, producers and biostratigraphy through two major faunal crises(Lorenzo Marchetti:2019)
The Rubidge Collection of fossil Karroo vertebrates(SH Haughton:1965)
↑ 超層群とは、地層区分で最も大きい単位で、紀や代を超えた長い地質時代に亘る。
↑ Biostratigraphy of the Cistecephalus Assemblage Zone (Beaufort Group, Karoo Supergroup), South Africa (RMH Smith:2020)