Pseudobacciger harengulae ( Yamaguti, 1938 )

Hulak, Bohdan & Kvach, Yuriy, 2018, Finding Of Pseudobacciger Harengulae (Digenea, Faustulidae) In The Mediterranean Horse Mackerel, Trachurus Mediterraneus (Actinopterygii, Carangidae), From The Gulf Of Odessa, Black Sea, Ukraine, Vestnik Zoologii 52 (1), pp. 47-52 : 48

Pseudobacciger harengulae ( Yamaguti, 1938) ( fig. 1 )

Host: Trachurus mediterraneus (Steindachner, 1868) .

S i t e o f i n f e c t i o n: intestine.

L o c a l i t y: Gulf of Odessa, North-Western Black Sea.

Body oval ( table 1; see fig. 1 , A–B). Tegument covered with spines. Oral sucker globular, ventrally subterminal, its posterior part hiding prepharynx and anterior part of pharynx, slightly smaller than ventral sucker. Ventral sucker slightly transversely elongate, almost entirely embedded in body. Gland-cells not observed.

Prepharynx not visible; pharynx oval. Oesophagus short, usually of same length as pharynx, or slightly longer. Caecal bifurcation anterior to ventral sucker. Caeca tubular, arcuate, posterior regions slightly widened, partly overlapping testes, reaching to posterior margin of testes or beyond. Excretory pore terminal; excretory vesicle V-shaped.

Genital pore median, between ventral sucker and intestinal bifurcation. Genital atrium not clearly seen but apparently short. Testes dorso-lateral, symmetrically located at midbody level. Cirrus-sac absent, pars prostatica and prostatic cells not observed. Seminal vesicle voluminous, bipartite (see fig. 1 , C), parts in tandem, anterior part larger than posterior, oval or round, located at level of ventral sucker, posterior part also oval or round, at level of posterior margin of ventral sucker or extending beyond. Ovary 3-lobed, between testes, slightly larger or equal to testes in size, partly post-testicular. Seminal receptacle ventral or ventro-lateral to ovary on either side, almost as large as posterior part of seminal vesicle. Vitellarium follicular, in two lateral, compact clusters located marginally at level of ventral sucker. Uterus in hindbody. Eggs oval, thick-shelled.

Figures

Fig. 1. Pseudobacciger harengulae ex T. mediterraneus from the Gulf of Odessa, Black Sea. A — total view of adult (drawing); B — photograph of adult; C — seminal vesicle: Ap — anterior part, Pp — posterior part.