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Supposed Asexual Reproduction in Trilobites


THE study of the newly discovered recent member of the Cambro-Silurian mollusc group Monoplacophora has caused me to extend investigations also to animals other than molluscs of the early Cambrian fauna. Then, I was struck by the appearance of some Olenellid Trilobites figured by Walcott1, showing additional segments behind what usually forms the long spine of the last segment (Fig. 1).

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  1. Walcott, C. D., Smithsonian Misc. Coll., 53, No. 6 (1910).

  2. Malaquin, A., “Recherches sur les Syllidiens”, Mém. Soc. Sci. Arts, Lille (1893).

  3. Störmer, L., “Traité de Zool.”, 6, 159 (1949).

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  4. Snodgrass, R. E., “Textbook of Arthropod Anatomy” (Ithaca, N.Y., 1952).

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  5. Burling, L. D., Ottawa Naturalist, 30 (1916).

  6. Raw, F., J. Palaeont., 31 (1957).

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LEMCHE, H. Supposed Asexual Reproduction in Trilobites. Nature 180, 801–802 (1957).

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