Coenogonous: oviparous at one season of the year, ovoviviparous at another, as in Aphididae.
"Explanation of Terms Used in Entomology" by John. B. Smith
Some of the dinosaurs may have been ovoviviparous, like some modern serpents.
"Through Nature to God" by John Fiske
Descending a little lower, we come to the oviparous and ovoviviparous tribes.
"The Religion of Geology and Its Connected Sciences" by Edward Hitchcock
All the garter snakes are ovoviviparous, i.e., hatch eggs within the body-cavity.
"Elementary Zoology, Second Edition" by Vernon L. Kellogg