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Spermatozoon, spermatodesmids and spermatophore in Ypresian amber from Southern France: a: acrosome; b: head of the sperm cell containing the nucleus; c: connecting piece; d: flagellum; e: optical section of a crack in the amber, probably induced by the sperm cell; i: immature spermatozoa; s: bag-like likely spermatophore covering the heads of the sperm cells (D); d: poorly preserved spermatodesmid. A. Isolated spermatozoon, unknown producer. B. Spermatodesmid, unknown producer. C. Two spermatodesmids, one poorly preserved, the other with immature 214 spermatozoa, unknown producer. D. Spermatodesmid and possible spermatophore, unknown producer.
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