Letter | Published:

Nitrogenous Excretion in Arachnids

Naturevolume 207pages10031004 (1965) | Download Citation

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Abstract

ANIMALS are known to excrete ammonia, urea, or uric acid as end-products of protein metabolism. So far as we can ascertain, the problem of nitrogenous excretion in arachnids needs more investigation. Since the work of Gorup-Besanez and Will1 in 1849, guanine was regarded as taking the place of uric acid as the main nitrogenous end-metabolite in arachnids. The method of synthesis of guanine in these animals is unknown2.

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References

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Affiliations

  1. Department of Zoology, Faculty of Science, University of Cairo, Giza, Egypt

    • GABER HAGGAG
    •  & YVON FOUAD

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https://doi.org/10.1038/2071003b0

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