Smith, A. B. & Crimes, T. P. 1983. Trace fossils formed by heart urchins - a study of Scolicia and related traces. Lethaia 16, 79-92.[details]
Kroh, A.; Mooi, R. (2021). World Echinoidea Database. Cardioichnus Smith & Crimes, 1983 †. Accessed through: Marine Species Traits editorial board (2021) Marine Species Traits at: http://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=758981 on 2024-04-18
Marine Species Traits editorial board (2024). Marine Species Traits. Cardioichnus Smith & Crimes, 1983 †. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=758981 on 2024-04-18
original descriptionSmith, A. B. & Crimes, T. P. 1983. Trace fossils formed by heart urchins - a study of Scolicia and related traces. Lethaia 16, 79-92.[details]
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