Bythograeidae Williams, 1980

Brösing, Andreas, 2010, Recent developments on the morphology of the brachyuran foregut ossicles and gastric teeth, Zootaxa 2510, pp. 1-44 : 21-22

Bythograeidae Williams, 1980

Segonzacia mesatlantica (Williams, 1988) ( Fig. 16 A, B) and Austinograea alayseae Guinot, 1989 ( Fig. 16 C– F)

Ossicles I and II are inclined about 45° in the antero-ventral direction. The zygocardiac ossicle (V) has a semicircular impression antero ventral. The unpaired propyloric ossicle (VI) is nearly vertical. The pectinal ossicle (VIII) is horseshoe-shaped with eight accessory teeth. The inferior lateral cardiac ossicle (XIII) has a connection-pice to the subdentate ossicle (XIV) antero dorsal. Ossicles “XVII–XXIII” are observed as a mixed ossicle. Ossicle XXII is not recognisable.

Figures

FIGURE 16. Foregut ossicles of Segonzacia mesatlantica (Williams, 1988), A. dorsal view, B. lateral view; gastric teeth of Austinograea alayseae Guinot, 1990, C. lateral tooth, D. accessory teeth, E. dorso-median tooth, F. cardio-pyloric valve; scales: A. & B. 1 mm, C. 300 µm, D. 100 µm, E. & F. 300 µm.