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Science 21 August 1964:
Vol. 145. no. 3634, pp. 829 - 831
DOI: 10.1126/science.145.3634.829
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Articles

Thysanuran Median Frontal Organ: Its Structural Resemblance to Photoreceptors

Rudolph L. Pipa 1, Richard S. Nishioka 2, and Howard A. Bern 2

1 Department of Entomology and Parasitology, University of California, Berkeley
2 Department of Zoology, Cancer Research Genetics Laboratory, University of California, Berkeley

The median frontal organ of Thermobia domestica (Packard) and the median ocellus of Tricholepidion gertschi Wygodzinsky were compared with respect to location, innervation, and fine structure. The data suggest that the two organs are homologous. Elementary neurosecretory granules were not found in the median frontal organ, but multivesicular bodies are present in both the frontal organ and ocellus


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Evolution of Photoreceptors.
R. M. Eakin (1965)
Cold Spring Harb Symp Quant Biol 30, 363-370
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Science. ISSN 0036-8075 (print), 1095-9203 (online)