Imogine nebulosa ( Girard, 1853 )

Bulnes, V. N., Faubel, A. & Park, J. - K., 2005, Two new marine species from South Korea with remarks on the family Stylochidae (Acotylea, Polycladida, Plathelminthes), Journal of Natural History (J. Nat. Hist.) 39 (23), pp. 2089-2107 : 2099-2100

Imogine nebulosa ( Girard, 1853)

( Figure 2B )

Planocera nebulosa Girard 1853, p 367 .

Planocera (Planoceropsis) nebulosa: Verrill 1892, p 471 –474, Plate XL: Figure 4 .

Stylochus nebulosus: Meixner 1907, p 431 , Plate XXV: Figure 3 , Plate XXVI: Figure 14, Plate XXVII: Figure 7.

Material examined

Voucher specimen. No. 2948, one sagittally sectioned specimen, locality: New Haven , Connecticut, USA, deposited in MNHV .

Morphological notes

In the following, only morphological characters which deviate from the description of Meixner (1907, p 431–433) are added or re-described.

Reproductive system. Tripartite, anchor-shaped seminal vesicle. Free prostatic vesicle roundish oval with finger-like extensions and interior lining of polyglandular type. The extra-vesicular glands lie at a short distance from the muscular wall of the prostatic vesicle in the parenchyma ( Figure 2B ).

Figures

Figure 2. Diagrammatic reconstruction of prostatic vesicles of Stylochidae. (A) Cryptostylochus coseirensis (Bock) after Meyer, 1921; (B) Imogine nebulosa (Girard); (C) Imogine oculifera Girard; (D) Stylochus alexandrinus Steinböck; (E) Stylochus frontalis Verrill; (F) Stylochus ellipticus (Verrill).

Figure 3. Diagrammatic reconstruction of prostatic vesicles of Stylochidae. Monoglandular types: (A–C) Cryptostylochus koreensis sp. nov.: (A) medio-sagittal section through the prostatic vesicle, (B) peripheral section through the prostatic vesicle, (C) diagrammatic reconstruction of the prostatic vesicle; (D) Cryptostylochus hullensis Faubel and Gollasch. Polyglandular types: (E) Stylochus neapolitanus (Delle Chiaje); (F) Distylochus pusillus Bock. Scale bars: 70 mm.

Figure 4. Cryptostylochus koreensis sp. nov. (A) Dorsal view of fixed specimen; (B) sagittal reconstruction of whole organism; (C) sagittal reconstruction of male and female apparatus. Scale bars: 20 mm (A); 8 mm (B); 4 mm (C).