Nephrotoma suturalis

Fig. 9. A living crane fly Nephrotoma suturalis) spermatocyte in anaphase I, showing the consequences of displacing a chromosome across the interzonal region. The arrows indicate the kinetochores of the displaced chromosome just before the micromanipulation experiment (0.0-minute print), just after displacement and removal of the needle (1.9 minutes), and during the subsequent steady motion back to the lower pole (4.5 to 17.0 minutes the two sister chromatids are visible throughout). The average velocity was 0.93 p per minute, typical of normal anaphase motion in this material. XI,000. (From unpublished experiments of Forer and Koch.)...

Forer, A. 1965. Local reduction of spindle fiber birefringence in living Nephrotoma suturalis (Loew) spermatocytes induced by ultraviolet microbeam irradiation. J. Cell Biol., 25 (Mitosis Suppl.) 95-117. 

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