Shape variation within the Southern Cavefish, Typhlichthys subterraneus (Percopsiformes: Amblyopsidae)
Hart, P., Burress, E. and Armbruster, J.
The Southern Cavefish, Typhlichthys subterraneus Girard 1859, is one of the most fascinating stygobionts of the Amblyopsidae because of undescribed diversity contained within the species. Previous molecular analysis suggests the presence of at least 10 distinct lineages in the Southeastern United States. Shape variation for this group had not been quantified previous to this study. We studied the morphological variation within the Southeastern populations of the Southern Cavefish using geometric morphometric analysis. Initial analyses of geometric morphometric data uncovered allometry, thus an allometric correction was implemented to recover size-independent morphospace for both the dorsal and lateral views. We then examined if morphological variation corresponded to aforementioned putative genetic lineages as well as aquifer association.
23rd International Conference on Subterranean Biology