Redescription of Aphalloides coelomicola Dollfus, Chabaud & Golvan, 1957 (Digenea, Opisthorchioidea) based on specimens from Knipowitschia caucasica (Berg) (Actinopterygii, Gobionellidae) from a Black Sea lagoon, with comments on the systematic position of the genus - Stoyanov, B.; Neov, B.; Pankov, P.; Radoslavov, G.; Hristov, P.; Georgiev, B. B. (Systematic Parasitology, 2015)