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Middaugh, Douglas P., John W. Fournie and Michael J. Hemmer. 1990. Vertebral Abnormalities in Juvenile Inland Silversides Menidia beryllina Exposed to Terbufos During Embryogenesis. EPA/600/J-90/382. Dis. Aquat. Org. 9(2):109-116. (ERL,GB 695). (Avail. from NTIS, Springfield, VA: PB91-163956)

Embryos of the inland silverside, Menidia beryllina, were exposed to a nominal concentration of 50 µg terbufos 1-1 during the first five days of embryogenesis. Silversides were maintained in clean dilute seawater until 37 days after hatching. Radiographs revealed compressed and fused vertebrae and dorsal-ventral misalignment of pre- and post-zygapophyseal processes. Histopathological examination of individuals exposed to terbufos during hyperostoses to almost complete fusion of some vertebrae.

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