The curious case of Charles Darwin’s frog, Rana charlesdarwini Das, 1998: Phylogenetic position and generic placement, with taxonomic insights on other minervaryan frogs (Dicroglossidae: Minervarya) in the Andaman and Nicobar Archipelago

Morphological variation observed among individuals of Minervarya andamanensis. A Lectotype (ZSIC 3539 / ZSIC 8539). B–H Dorsal views. B SDBDU 2020.4181 (♀). C SDBDU 2020.4154 (♂). D SDBDU 2021.4207 (♀). E SDBDU 2020.4171a (♀). F SDBDU 2020.4179 (♀). G SDBDU 2020.4155 (♂). H SDBDU 2020.4180 (♂). I–K Ventral views. I SDBDU 2020.4180 (♂). J SDBDU 2020.4154 (♂). K SDBDU 2020.4171a (♀). L Lateral view, SDBDU 2021.4291 (♀). M–N Ventral view of hand, SDBDU 2021.4207 and SDBDU 2000.4179, respectively). O Schematic illustration of foot webbing, SDBDU 2021.4207 (♀). P–Q Ventral view of foot, SDBDU 2020.4179 and SDBDU 2001.4207, respectively. R Posterior view of thigh, SDBDU 2020.4179 (♀). S. Dorsal view of thigh, SDBDU 2021.4207 (♀). Photographs: S. D. Biju.