E. D. Vasil’eva and V. P. Vasil’ev. 2006. Cobitis pontica sp. novaa New Spined Loach Species (Cobitidae) from the Bulgarian Waters. Journal of Ichthyology vol. 46 suppl. 1
Abstract—Spined loaches from the Veleka River (Black Sea coast of Bulgaria), earlier confirmed to represent a separate evolution lineage within a 50-chromosome morph occurring in the Black Sea basin, are described as a new species. This species has the karyotype (2n = 50, NF = 90) similar to one from earlier described C. taurica occurring in the Crimean Peninsula, but differs from it by larger and less numerous spots in the fourth Gambetta’s zone of pigmentation and more anterior position of suborbital spine.