One of the main challenges in the conservation of biodiversity is to overcome inadequate knowledge about species and
their intra-specific diversity. In the present study, we attempted to assess morphological distinction of the two previously
identified genetic clades within the Luristan newt (Neurergus kaiseri, Schmidt 1952) endemic to Iran, which is essential
for its conservation planning. Signals of the morphological variation in N. kaiseri were evaluated using landmark-based
geometric morphometrics of body shape and characters of osteological structures. Morphological approaches revealed
consistent groupings within the species, confirming the presence of two distinct lineages (previously named as the northern
and southern clades). The morphological and genetic data provide evidence for the possible co-existence of two species in
N. kaiseri and we recommend assigning the newly recognised forms to the species level.
