There is an very good paper about twinnings in turtles and you have information about twinnings in reptiles in the introduction:

Piovano, S., Kaska, Y., Prazzi, E., Nannarelli, S., & Giacoma, C. (2011). Low incidence of twinning in the loggerhead sea turtle. Folia Zool, 60, 159-166.

It is available online in research gate:

https://www.researchgate.net/publication/236960562_Low_incidence_of_twinning_in_the_loggerhead_sea_turtle

Sincerely,

Marc Girondot

Article Low incidence of twinning in the loggerhead sea turtle

Dear Marc,

Thank you for your answer.

I will check that paper. I have found some twinning papers on reptiles, however most of them turned out to be monozygotic twinning.

Kind regards,

Attila Salamon

Hi,

this paper

Langford, M. 1985. Husbandry and captive breeding of the sand lizard (L. agilis) as an adjunct to habitat management in the conservation of the species in Britain. British Herpetological Society Bulletin, No. 13: 28-36.

contain potentially useful information:

"25 eggs produced normal hatchlings and, strangely, two eggs produced twins (i.e. two hatchlings from a single egg. These twins were ca. 2/3 of normal hatchling size. They emerged from apparently normal sized eggs."