. Bonner zoologische Monographien. Zoology. BONNER ZOOLOGISCHE MONOGRAPHIEN Nr. 54/2007 5. Host data: all specimens were collected free- living. 6. Distribution (Fig. 16): Crozet Is. - Indian sec- tor of the Antarctic region; S. Georgia I. - Atlantic sector. References: Epshtein 1974. Remark: this species has been included in the genus Moorebdellina by Epshtein (1974). However coelomic system differs from those in other members of Pontobdellinae by having only one pairs of pulsa- tile vesicles per somite. Thus, the subfamilia affiliati- on open to question. Moorebdellina meyeri , 1997
. Bonner zoologische Monographien. Zoology. BONNER ZOOLOGISCHE MONOGRAPHIEN Nr. 54/2007 5. Host data: all specimens were collected free- living. 6. Distribution (Fig. 16): Crozet Is. - Indian sec- tor of the Antarctic region; S. Georgia I. - Atlantic sector. References: Epshtein 1974. Remark: this species has been included in the genus Moorebdellina by Epshtein (1974). However coelomic system differs from those in other members of Pontobdellinae by having only one pairs of pulsa- tile vesicles per somite. Thus, the subfamilia affiliati- on open to question. Moorebdellina meyeri , 1997 1. External characters (Figs. 23, 24). Not large leeches. Up to mm in length and mm in width. Body long, cylindrical, distinctly divided into trachelosome and urosome (Figs. 23: 1; 24). Anterior sucker small, distinctly divided from trachelosome, eccentrically attached; with two eye-like spots and papillae; mouth- pore centrally located (Fig. 23: 2). Posterior sucker small, smaller than anterior sucker, centrally attached, facing directly posteriorly, without papillae (Fig. 23: 3). Annulation. Clitellum 6-annulate (Fig. 23: 4). Male gonopore located between annuli 1 and 2, female gonopore between 4 and 5. External copulatory area absent. Complete somite 3-annulate, annulus Ai with 6 tubercles, A2 and A3 with smaller tubercles (Fig. 23: 5). Anus on first annulus from posterior sucker (Fig. 25: 3). Coloration. Anterior sucker with two pigmented area around eye-like spots. Body with light pigment bands (the examined specimens most likely are un- pigmented after alcohol fixation). 2. Digestive system (Fig. 23: 6). Base of proboscis located between ganglia 3 and 4 of ventral nerve cord. Esophageal diverticula absent. Crop chambers weakly developed, without lateral processes. Posterior crop caeca nontotally fused with 5 fenestrae, without la- teral processes, extending to posterior ganglion mass. Posterior portion of posterior crop caeca separated. 5 intestinal chambers wel
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