Pigments of the hydracarine Eylais extendens (acari: hydrachnellae)

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Abstract

  • 1.

    1. Adults of the water mite Eylais extendens contain the following carotenoids: β-carotene, a keto-carotenoid, a xanthophyll similar to lutein, and astaxanthin, part of which is esterified.

  • 2.

    2. Larvae of the same species contain a keto-carotenoid and astaxanthin, part of which is esterified.

  • 3.

    3. Astaxanthin and its esters form over 70 per cent of the total carotenoids in both adult and larva. In the adult, part of the astaxanthin is linked to a protein.

  • 4.

    4. A non-carotenoid pink pigment of unknown identity is also found in the adult.

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Present address: Westfield College, Kidderpore Avenue, London, N.W.3.

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