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Synchroton image of female H. papillosa including coloured representation of sexual organs.
Matzke-Karasz, R. Smith, R. J. Symonova, R. Miller C.G. and Tafforeau, P. 2009. Sexual intercourse involving giant sperm in Cretaceous ostracode. Science, 24(5934), 1535.
Smith, R. J. 2000. Morphology and ontogeny of Cretaceous ostracods with preserved appendages from Brazil. Palaeontology, 43(1): 63-98.
Bate, R.H. 1972. Phosphatised ostracods from the Cretaceous of Brazil. Palaeontology 15: 379-393.