Procerodes dohrni Wilhelmi, 1909

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 : 129-130

Procerodes dohrni Wilhelmi, 1909

( Fig. 4 a)

Habitat. 20 specimens were collected under stones.

Locality. Lagoon of Tunis (36° 48' 50.60'' N; 10° 16' 47.47'' E), Salambo (36° 50' 46.65'' N; 10° 19' 31.57'' E).

Localities in Tunisia from bibliography. This species was collected previously in Salambo ( Zghal & Tekaya 1980) and recently in lagoon of Tunis ( Charbagi-Barbirou et al. 2011).

Other localities in the world. Naples ( Wilhelmi 1909); Marseille ( Chandebois 1954).

Remark. Chandebois (1954) mentioned that Procerodes lobatus and Procerodes dohrni have never been found in association in the Gulf of Marseille. The author revealed the difference allowing distinction between both species:

Shape: body is more elongated and narrower in P. lobatus than in P. dohrni

Auricles: straight and horn-shaped in P. dohrni ( Fig. 4 a) and flat, broad, triangular in P. lobatus ( Fig. 4 b)

Prepharyngeal area including head is representing third of body in P. dohrni ( Fig. 4 a) and half of body in P. lobatus ( Fig. 4 b)

Testes are smaller in size in P. lobatus than in P. dohrni

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.