Crossotonotidae Moosa & Serène, 1981

Brösing, Andreas, 2010, Recent developments on the morphology of the brachyuran foregut ossicles and gastric teeth, Zootaxa 2510, pp. 1-44 : 28-29

Crossotonotidae Moosa & Serène, 1981 and Palicidae Bouvier, 1898

Based on nearly identical foregut characters, species of both families are described here together. Crossotonotus spinipes ( De Man, 1888) (Crossotonotidae) ( Fig. 24 A, B); Pseudopalicus declivis Castro, 2000 ( Fig. 24 C-F); Parapalicus clinodentatus Castro, 2000 and Micropalicus vietnamensis (Zarenkov, 1968) (last three species = Palicidae )

Ossicles I and II are inclined about 45° in the antero ventral direction. The unpaired propyloric ossicle (VI) is inclined about 10° in the posterior direction. The pectinal ossicle (VIII) is horseshoe-shaped with five accessory teeth. Ossicles “XVII–XXIII” are observed as a mixed ossicle. Ossicle XVIII has a comparatively large surface.

Figures

FIGURE 24. Foregut ossicles of Crossotonotus spinipes (De Man, 1888), A. dorsal view, B. lateral view; gastric teeth of Pseudopalicus declivis Castro, 2000, C. lateral tooth, D. accessory teeth, E. dorso-median tooth, F. cardio-pyloric valve; scales: A. & B. 1 mm, C. 200 µm, D. 100 µm, E. & F. 200 µm.