New Caledonian Giant Gecko Parthenogenesis Update



Thomas Favazza spent months hoping he’d witness a miracle. It apparently came this summer.

Favazza, a hobbyist from Macomb County, Mich., owns a pair of female Nuu Ana New Caledonian giant geckos that he said have never been with a male. Yet since the winter of 2008 these Rhacodactylus leachianus henkeli have produced a few eggs containing partially or fully developed embryos. None had survived -- until a live hatchling emerged on July 7.

New Caledonian Giant Gecko

Thomas Favazza

The owner of R. McCoy, a hatchling New Caledonian giant gecko, believes it’s an example of virgin birth.

A hobbyist for 25 years, Favazza said he never thought he would witness such a rare occurrence as parthenogenesis, when a female’s eggs develop without male fertilization. Some reptiles are capable of it, but currently no Rhacodactylus species has been recorded as parthenogenetic. Now Favazza believes he has witnessed it.

Some geckokeepers and members of the scientific community still have their doubts, but Favazza is undeterred. He named his hatchling R. McCoy, which stands for Real McCoy. “I know personally that this is the real thing,” he said. “We’ll let science catch up.”

More on New Caledonian Giant Gecko Parthenogenesis>>

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