Dr. Murai Éva szerk.: Parasitologia Hungarica 13. (Budapest, 1980)

still visible in young specimens (Fig. 20). Under that structure, if present, there is the beginning of the excretory ducts (a ventral and a dorsal pair) running down at a distance of about 0. 060 from the scolex external wall and 0.282-0.400 (0.331) from the sexual segments external wall. The diameter of the ventral ducts ranges between 0.038-0.060 (0.045) at the level of the sexual segments. The strobila is made up of 50-70 segments of the craspedote type, with a relative increase length posteriorly. The first proglottids are wider than long; sexual mature ones are almost square, of 1.2-1.6/1. 5-1. 8 (1.5/1.6) of length/width (ratio of length and width 1:1. 1); gravid segments of 2.7-3.4/1.8-2.2 (2.9/2.0) of length/width (ratio of length and width 1. 5:1). The neck is rather short, between 1.0-1. 5 (1.4), variability depending on fixation. The genital pores open at the end of the first third of the proglottids, alternating irregularly (in 50 segments studied, it was 30 times on the right, 20 times on the left; the highest number of consecutive segments with the pore on the same side being 6). The number of the testes ranges from 150-180 (170), the diameter of which being 0.050-0.086 (0.066). About 50 or 60 of them overlap excretory ducts bilaterally (Fig. 22). The cirrus sac measures 0. 164-0. 282/0. 077-0. 096 (0. 229-0. 087) and never reaches the lateral excretory duct. The cirrus is unarmed, ranging from 0. 134-0.268 (0.201). Vas deferens showing prostatic cells clearly visible at its end. The ovary is markedly lobed, occuppying the anterior half part of the sexual proglottid and overlapping excretory ducts bilaterally. The vitelline gland has a diameter ranging from 0. 522-0.671 (0.564); it is always displaced porally and placed behind the ovary, being less lobed than the ovary and overlapping excretory ducts porally. The vagina runs nearly parallel to the male deferent duct, measures 0.345-0. 522 (0. 462) and ends up at an almost completely spherical seminal receptacle of 0.089-0. 134 (0. 108) of diameter. Uterus begins to develop in the 20th or 24th sexual segment. The number of uterine main lateral branches is from 12-15 x 2 (13x2) at the gravid segments (Fig. 23). Lateral branches of uterus always across excretory ducts bilaterally. Eggs rectangular, presenting double external membrane expanding in two lateral alar processes, measuring 0.028-0.033/ 0.11-0.15 (0.030/0.013) (Fig. 24). The oncosphere is of 0. 018-0. 022/0. 007-0. 011 (0,020/ 0. 008). The size of the embryonal hooks is about 0. 004-0. 005 (0. 004). Note: The material found in Spain is in principle identical with C. matovi described by GENOV (1971). It differs particularly in the length of cirrus sac, number of uterine branches and situation of uterine branches in relation to excretory organs. Our study of the material of GENOV (19 71), as well as our correspondence with him, revealed that these data are incorrect in the original description of C. matovi. The species C. matovi was also reported by ZAVALEEVA (1974) from the Crimea Region (USSR). The metrical data are compared in Table 1. The table shows that the material from the USSR, Spain and Bulgaria is not identical in all characters. Since the criteria for species differentitation in the genus Pseudo catenotaenia are not exactly defined, we leave the material from the USSR, Bulgaria and Spain under the name Pseudocatenotaenia matovi (Genov, 1971) for the time being. It is quite likely that more species are involved. 4. Genus Quentinotaenia gen.nov. Description: Cestodes of the family Catenotaeniidae, subfamily Catenotaeniinae. Mature and gravid segments longer than wide. Genital pores in anterior fourth of segments, regularly alternating. Scolex with four large suckers. Neck absent. Ovary in upper half of segments, almost symmetrical, horseshoe-shaped, its larger portion situated under openings of genital organs. Upper portion of ovary overlapping the level of genital openings. Seminal receptacle situated inside horseshoe-shaped ovary. Vitelline gland compact, situated posteriorly to ovary, upper margin reaching lower branches of ovary. Testes lying posteriorly to vitelline gland, between lateral excretory canals. Exact morphology of eggs unknown. Lifecycle unknown. Adult specimens parasitic in Caviomorph of the family Caviidae in the Neotropical Region. Type species: Quentinotaenia mesovitellinica (Arandas Régo, 1967) n. comb. (Fig. 16) Syn. : Catenotaenia mesovitellinica Arandas Régo, 19 67. Deposition of holotype of type species: Institute Oswaldo Cruz, Rio de Janeiro, South America. This genus is monotypic.