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Castillo-Fernandez, D.; Lambshead, P. J. D. (1990). Revision of the genus Elzalia Gerlach, 1957 (Nematoda: Xyalidae) including three new species from an oil producing zone in the Gulf of Mexico, with a discussion of the sibling species problem. Bulletin of the British Museum (Natural History), Zoology Series. 56(1): 63-71.