Figure 4.

Embryonated Aspiculuris tetraptera ova on day 3 of culture in distilled water at room temperature. (A) 2 live ova. (B) 2 live and 1 dead ova. Embryonated Aspiculuris tetraptera ova on day 5 of culture in distilled water at room temperature. (C) 2 live ova. (D) Multiple live ova with one dead ovum. Bar, 50 µm. The unembryonated ova prior to day 3 of culture have a round nucleus inside an ellipsoidal outer shell. The embryonated ova have an elongated embryo which can be seen moving inside the outer shell. The embryonated ova look very similar to each other from day 3 to day 5 of the culture. Magnification, 40×.