Ocypodidae Rafinesque, 1815

Brösing, Andreas, 2010, Recent developments on the morphology of the brachyuran foregut ossicles and gastric teeth, Zootaxa 2510, pp. 1-44 : 29-30

Ocypodidae Rafinesque, 1815

Ocypode gaudichaudi Milne Edwards & Lucas, 1843 ( Fig. 25 A, B) and Ocypode cursor (Linnaeus, 1758) ( Fig. 25 C–F)

Ossicles I and II are inclined about 45° in the antero ventral direction. The unpaired propyloric ossicle (VI) is inclined a few degrees in the posterior direction. The urocardiac ossicle (VII) has an oval non-calcified area antero median. The pectinal ossicle (VIII) is ring-shaped with 13 accessory teeth. The dorsal part of the prepectinal ossicle (IX) is elongate and curves towards the post-pterocardiac ossicle (IIb); its ventral part is significantly widened and has postero ventral a hook-shaped structure. The inferior lateral cardiac ossicle (XIII) has the shape of an elongate oval shape. Postero dorsal it has a triangular, posteriorly directed connection-piece to the subdentate ossicle (XIV). Ossicles XIXa and XXIa are not recognisable.

Uca (Minuca) rapax (Smith, 1870) ( Fig. 26 A, B) and Uca (Gelasimus) tetragonon (Herbst, 1790) ( Fig. 26 C– F)

Ossicles I and II are inclined about 45° in the antero ventral direction. The pterocardiac ossicle (II) is nearly completely connected with the entire antero lateral margin of the mesocardiac ossicle (I); laterally it extends in the form of two projections to the ossicles V and IX. The unpaired propyloric ossicle (VI) is nearly vertical. The pectinal ossicle (VIII) is ring-shaped with 11 accessory teeth. The median and postero ventral parts of the prepectinal ossicle (IX) are enlarged. The inferior lateral cardiac ossicle (XIII) has a long oval shape and two ventrally crossed, rounded tips; the ossicle has a clear connection-piece to the subdentate ossicle (XIV). The lateral ossicle of the cardio-pyloric valve (XVIII) is greatly increased in size and covers the lateral side of the cardio-pyloric valve. Ossicles “XXI–XXIa” are observed as a mixed ossicle.

Figures

FIGURE 25. Foregut ossicles of Ocypode gaudichaudi H. Milne Edwards & Lucas, 1843, A. dorsal view, B. lateral view; gastric teeth of Ocypode cursor (Linnaeus, 1758), C. lateral tooth, D. accessory teeth, E. dorso-median tooth, F. cardio-pyloric valve; scales: A. & B. 1 mm, C. 400 µm, D. 100 µm, E. 1 mm, F. 300 µm.

FIGURE 26. Foregut ossicles of Uca (Minuca) rapax (Smith, 1870), A. dorsal view, B. lateral view; gastric teeth of Uca (Gelasimus) tetragonon (Herbst, 1790), 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.