Progynotaenia odhneri Nybelin, 1914 and Paraprogynotaenia charadrii (Yamaguti, 1956) are redescribed and figured on the basis of specimens from Charadrius alexandrinus in Bulgaria (new geographical records). P. odhneri of Ryzhikov and Tolkacheva (1981) is considered to represent a heterogeneous group of species. The allocation of P. charadrii to the genus Paraprogynotaenia rather than Proterogynotaenia, as proposed by Jensen etal. (1983), is confirmed. The regularity of the alternation of the genital pores is rejected as a character for distinguishing Progynotaenia and Paraprogynotaenia; for this purpose, (he most reliable character is the position of the seminal receptacle relative to the ovary in female proglottides.
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