Reptiles and Amphibians

I don't think it's well-studied, but I found a paper stating this:

Turtles and tuatara exhibited greater longevity than most other ectothermic tetrapods, with mean longevities of 39 (SE, ±6 years) and 137 years, respectively, compared with crocodilians (21 ± 5 years), squamates (12 ± 2 years), frogs (8 ± 0.6 years), and salamanders (10 ± 1 years) (tables S1 and S2 and data S1), again when corrected for the potential confounding effects of body size and phylogeny [1, p. 4].

1. Reinke, Cayuela, H., Lemaitre, J.-F., Gaillard, J.-M., Iverson, J. B., Christiansen, D. G., Gutierrez-Rodriguez, J., Rose, F. L., Nelson, N., Keall, S., Crivelli, A. J., Nazirides, T., Mori, E., Guiller, G., Olivier, A., Muths, E., Hossack, B. R., Bonnet, X., Pilliod, D. S., … Gardner, M. G. (2022). Diverse aging rates in ectothermic tetrapods provide insights for the evolution of aging and longevity. Science (American Association for the Advancement of Science), 376(6600), 1459–1466. https://doi.org/10.1126/science.abm0151