Dynomenidae Ortmann, 1892

Brösing, Andreas, 2010, Recent developments on the morphology of the brachyuran foregut ossicles and gastric teeth, Zootaxa 2510, pp. 1-44 : 9-10

Dynomenidae Ortmann, 1892

Dynomene filholi Bouvier, 1894 ( Fig. 3 A, B) and Dynomene praedator A. Milne-Edwards, 1879 The unpaired prepterocardiac ossicle (IIa) consists of a single narrow strip in front of the mesocardiac ossicle (I). The very small pectinal ossicle (VIII) has a triangular shape with four accessory teeth. An anteriorly directed spine extends from the middle of the subdentate ossicle (XIV). Ossicles XVII and XXII are not recognisable.

Paradynomene tuberculata Sakai, 1963 ( Fig. 3 C–F)

The very small pectinal ossicle (VIII) has a triangular shape with five accessory teeth. The lateral mesopyloric ossicle (XIXa) and the preampullary ossicles (XXII) are only present in this species in contrast to the above described dynomenid species. The infra-uropyloric fragment (XXIa) is short and comma-shaped. The middle pleuropyloric ossicle (XXXII), as in the other species of dynomenids, is more extensive.

Figures

FIGURE 3. Foregut ossicles of Dynomene filholi Bouvier, 1894, A. dorsal view, B. lateral view; gastric teeth of Paradynomene tuberculata Sakai, 1963, 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. 200 µm, F. 500 µm.