Cooper, C.L. (1947a) Upper Kikaid (Mississippian) Microfauna from Johnson County, Illinois. Journal of Paleontology 21, 81–94.[details] Available for editors
Brandão, S. N.; Antonietto, L. S.; Pereira, J. S.; Pereira, S. G. G.; Sá, H. A. B.; Praxedes, R. A.; Sabater, L. M., Santos, S.G.; Karanovic, I. (2025). World Ostracoda Database. Healdia sulcata Cooper, 1947 †. Accessed through: Marine Species Traits editorial board (2025) Marine Species Traits at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=784707 on 2025-05-21
Marine Species Traits editorial board (2025). Marine Species Traits. Healdia sulcata Cooper, 1947 †. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=784707 on 2025-05-21
original descriptionCooper, C.L. (1947a) Upper Kikaid (Mississippian) Microfauna from Johnson County, Illinois. Journal of Paleontology 21, 81–94.[details] Available for editors
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