Latreilliidae

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

Latreilliidae de Haan, 1840

The foreguts of Latreillia valida und Latreillia metanesa share two remarkable autapomorphic characters that distinguish them from all other brachyuran species examined here. First, the foreguts are laterally flattened and secondly, the oesophagus is anteriorally-directed.

Latreillia valida de Haan, 1839 ( Fig. 5 ) and Latreillia metanesa Williams, 1982

The paired oval prepterocardiac ossicles (IIa) are joined at the midline. The unpaired propyloric ossicle (VI) is inclined some 10–20° in the posterior direction. The pectinal ossicle (VIII) is horseshoe-shaped with 11 accessory teeth. Ossicle (XXIa) is not recognisable.

Figures

FIGURE 5. Foregut ossicles and gastric teeth of Latreillia valida De Haan, 1839, A. dorsal view, B. lateral view, C lateral tooth, D accessory teeth, E dorso-median tooth, F cardio-pyloric valve; scales: A. & B. 1 mm, C. – F. 100 µm.