per Agnarsson et al 2016 and accepted in WSC, "Argiope argentata" in Cuba were described as a new species, A. butchko that diverged ~3.8 million years ago.

Agnarsson, I., LeQuier, S. M., Kuntner, M., Cheng, R. C., Coddington, J. A. & Binford, G. (2016). Phylogeography of a good Caribbean disperser: Argiope argentata (Araneae, Araneidae) and a new ‘cryptic’ species from Cuba. ZooKeys 625: 25-44. https://zookeys.pensoft.net/articles.php?id=8729

https://wsc.nmbe.ch/species/55226/Argiope_butchko