Cercyra hastata Schmidt, 1861

Gammoudi, Mehrez, Garbouj, Myriam, Egger, Bernhard & Tekaya, Saïda, 2017, Updated inventory and distribution of free-living flatworms from Tunisian waters, Zootaxa 4263 (1), pp. 120-138 : 128

Cercyra hastata Schmidt, 1861

( Fig. 4 e–f)

Habitat. 4 specimens were collected under stones on a sandy beach.

Locality. Berkoukech beach, Tabarka (36° 57' 10.04'' N; 08° 45' 43.99'' E).

Localities in Tunisia from bibliography. No records

Remark. Cercyra hastata is one of the preferred preys of the polyclad Prosthiostomum siphunculus (see Gammoudi et al. 2012a). The polyclad was observed to attack the triclad with its tubular pharynx.

Other localities in the world. Turkey ( Ax 1959); France ( Du Plessis 1907); Spanish Mediterranean coasts; Italian coasts; Atlantic Cantabrian coasts ( Vila-Farre et al. 2009); Black sea ( Sluys 1989) ; Ukraine ( Murina, 1981).

Figures

FIGURE 4. Marine triclads. a Cleared whole mount of Procerodes dohrni. Note the presence of horn-shaped auricles in the anterior margin of body arrowheads. The pharynx ph is located in the second third of body. The testes (arrows) are distributed between intestinal ramifications ir. Penis papilla pp. b Cleared whole mount of Procerodes lobatus. Note the presence of flat auricles appearing as anterior marginal expansions (folds) arrowheads. The pharynx ph is located in the second half of body. Testes (arrows) are superimposed with intestine ramifications ir; penis papillae pp. c Cleared whole mount of Cerbussowia cerruti. The pharynx ph is located in the last third of body. A pair of oval shaped testes t and piriform ovaries ov are located anteriorly to the pharynx; vas deferens vd; intestine ramifications ir. d Procerodes lobatus. Dorsal view e Cercyra hastata. Ventral view showing everted pharynx ph and pigmented anterior end pae. f Cercyra hastata. Dorsal view. g Cleared whole mount of male specimen of Sabussowia dioica. The pharynx ph is located in the posterior part of the body. Testis (arrows) are distributed in all parts of the body. h Cleared whole mount of female specimen of Sabussowia dioica showing spermatophore (arrowhead) being impregnated to the marginal tissue of the body. Ovaries ov are located behind cerebral area. i Cleared whole mount of female specimen of Sabussowia dioica showing cocoon cc in uterus. Scale bars: 4 a – c: 0.5 mm; 4 d: 0.5 mm; 4 e – f: 1 mm; 4 g – i: 1 mm.