Summary
Scanning electron microscopic (SEM) observations of brine shrimp nauplii reveal the dorsal surface of the cephalothorax region to be specialized in structure. During larval differentiation the epithelial layer is transformed from a flat caplike structure into a hemispherical dome that has deep channels coursing through the epithelium. A thin cuticular film covers the epithelial cap but a distinct ruffled edge serves as a boundary that identifies the limits of the organ. These morphological observations support previous finding which indicated this area to be the site of the larval salt gland.
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This research was supported by AEC grant RLO 2227-T13-2. One of the authors (FPC) wishes to thank Mr. Michael Nemanic, Dept. of Zoology, University of California for help in preparing specimens and to Dr. Thomas Hayes, Donner Lab, for the generous use of his scanning electron microscope. The authors also wish to thank Dr. Franco Rossi, Mr. Charles Dwire, and Mrs. Joan Dwire of Electros Analytics, A Division of Electros, Inc. Tigard, Oregon for the time and effort given in the preparation of the micrographs of the freeze-dried specimens.
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Hootman, S.R., Harris, P.J. & Conte, F.P. Surface specialization of the larval salt gland inArtemia salina nauplii. J. Comp. Physiol. 79, 97–104 (1972). https://doi.org/10.1007/BF00693621
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DOI: https://doi.org/10.1007/BF00693621